Engine

Driven engine block off plates will stop the annoying and possibly damaging backfires from occurring while allowing you to remove a few pounds in associated valves and hoses from your bike. On late model EFI bikes with 02 sensors, ESPECIALLY when using Dynojet's Power Commander V with the Autotune feature, the air injection system MUST be blocked as it will introduce additional oxygen into the system which will skew your 02 sensor's values and make it impossible to get a correct tune.

An easy big bore kit that increases your KLX110cc motor to 130cc. Includes piston, rings, pin, clips, and gaskets. A quick and inexpensive way to really improve your engine.

• 57mm aluminum piston with pin, clips, and rings
• Includes base, head, and side cover gaskets
• Requires boring of your stock cylinder

If you want a fire breathing KLX110, the BBR 160cc kit is the right choice. This kit allows the largest possible displacement available without the headaches of running a stroked crankshaft.

• Aluminum Cylinder w/ oversized sleeve
• Requires boring of your stock engine cases for the larger sleeve

High quality bore kit that shows substantial power gains throughout the RPM range. 63mm piston. 10.5:1 compression ratio allows use of premium pump gas. Complete kit includes: cylinder, piston, ring set, pin, clips and gaskets.

• Brand new high quality BBR aluminum cylinder
• 10.5:1 compression ratio
• 63mm piston
• Includes cylinder, piston, pin, rings, and gaskets

Big bore kit for the 2003-2005 CRF150F. A simple bore in bore kit that includes BBR's high performance camshaft and valve springs for added performance. This cam features higher lift and duration than stock. Complete kit includes piston, rings, pin, clips, BBR MX cam, valve springs and gaskets. This is the quickest way to add the most power to your bike. Great when combined with our exhaust system, Rev-Box, and Free-Flow airfilter. Requires machining of stock cylinder for installation.

• Adds up to 3.5 HP
• 67mm piston, pin, clips, and rings
• 10.75:1 compression ratio
• Includes head and base gaskets
• Makes more aggressive style of power
• Bike still starts easily and idles smooth
• Same camshaft as used by the BBR Race Team
• Requires professional boring of your stock cylinder

High quality bore kit that shows substantial power gains throughout the RPM range. 65mm piston. 9.8:1 compression ratio allows use of premium pump gas. Complete kit includes: cylinder, piston, ring set, pin, clips and gaskets.

• All new design
• Brand new high quality BBR aluminum cylinder
• 9.8:1 compression ratio
• 65mm piston
• Includes cylinder, piston, pin, rings, and gaskets

CRF230F 240cc Kit:

• 67mm piston, pin, clips, and rings
• New (not reground) high-performance camshaft
• Includes heavy-duty valve springs
• Includes head and base gaskets
• Requires boring of your stock cylinder to fit the new piston

• Aluminum cylinder designed with wider water jackets for better cooling
• Forged hi-compression piston
• Includes all necessary Rings, Clips, and Gaskets

You will need to tune your EFI with something like the Power Commander V to get the most out of your Big Bore kit.

For riders looking for advanced performance. Kit comes with everything you need to turn your XT250 into a rocket.

• 81mm piston kit
• 11:1 compression
• Big bore sleeve
• Top end gasket kit

 As with any engine or exhaust modification, you will need to re-tune your fuel delivery system for optimum performance.

Includes forged Wiseco 83mm Piston, Rings, Clips, Pin and top end gasket set.

• Direct bolt-on, ready-to-install cylinder; requires no replating and looks virtually identical to the OEM
• Nickel Silicon Carbide plated for long life
• Honed to exact size for easy piston installation
• Big bore cylinders do not require any machine work
• Come complete with gaskets, cylinder, 94mm piston, rings, pin and clips

Includes forged JE 89mm piston 10.5:1 piston, Rings, Clips, Pin, big bore sleeve and top end gasket set. You will have to have the big bore sleeve installed in your cylinder and bored to fit the larger piston.

• Includes aluminum cylinder, piston kit, and special gasket set designed for larger water jackets
• Bolts on with no machining required
• 94mm big bore piston
• Aluminum cylinder designed with wider water jackets for better cooling.
• Forged hi-compression piston  12.8:1
• Includes all necessary Rings, Clips, and Gaskets.

Wiseco 96mm piston with rings, wrist pin, circlips, head gasket, and base gasket. Requires your cylinder to be bored to fit the larger piston.

Special order item. Allow 10 extra days for delivery.

2mm oversize from stock. Requires cylinder boring only. 12.5:1 compression. Includes pistons, rings, pins, clips and head gaskets.

The 790cc Big Bore Kit includes a custom made, forged 9.5:1 piston with rings, wrist pin and circlips. A custom made multi-layer steel head gasket, OEM metal base gasket, tensioner gasket, and cam bolt lock plate and a ProCycle specific big bore cylinder sleeve. We recommend adding a KRAMM-Lox tool for easier piston circlip instalation.

Cylinders with 790 sleeves installed are usually in stock, but we must have your original cylinder as a 'core'. These cores allow us to keep up this program and it is nothing more than an exchange - we give you ours, you give us yours.

Complete big bore kit. Bolt it on and ride!

• Includes a pre-bored, big-finned aluminum cylinder for improved cooling
• Cylinder, rings, piston pin, & clips
• BBR exclusive performance camshaft
• Heavy-duty valve springs
• Rockers with tappet adjusters
• Gasket kit

This kit provides much of the performance gain of the more expensive 150 (143cc) kits. But gives better reliability due to the thicker wall of the cylinder sleeve.

• Wiseco 55mm high compression 11:1 piston, rings, wrist pin, and clips
• HotCams stage 1 performance camshaft
• Includes top end gasket set
• Requires cylinder to be bored to fit the larger piston

New aluminum cylinder with plated aluminum liner. High performance camshaft with lightweight piston. This is the largest bore kit available for the KLX110 that does not require boring your engine cases.

• Aluminum cylinder with plated aluminum sleeve
• BBR high-performance camshaft
• 60mm lightweight aluminum piston
• Includes gaskets

Complete kit with custom made cylinder and camshaft.

• BBR aluminum cylinder with steel liner (bored, honed and ready to use)
• 58mm piston, pin, clips, and rings
• Includes head and base gasket
• New (not reground) high-performance camshaft

285cc big bore kit includes Wiseco piston (with rings, pin & clips), HotCams stage 1 camshaft and complete top end gasket set. This is a great combination and a big 'bang for the buck' performance increase. No re-sleeving required. You will have to have your cylinder bored to fit the larger piston.

ProCycle 425cc BIG BORE 88mm KIT With Cam Complete kit with 11:1 Wiseco piston (with rings, pin & clips), HotCams stage 1 performance camshaft and gaskets. No re-sleeving required. You will have to have your cylinder bored to fit the larger piston.

ProCycle 440cc BIG BORE 89mm KIT 1 With Cam. Complete kit with 12.5:1 Wiseco piston (with rings, pin & clips), big bore cylinder sleeve, HotCams stage 3 camshaft and top end gasket set. You will have to have the larger sleeve installed in your cylinder.

ProCycle 440cc BIG BORE 89mm KIT 2 With Cam Complete kit with 11:1 Wiseco piston (with rings, pin & clips), big bore cylinder sleeve, HotCams stage 3 camshaft and top end gasket set. You will have to have the larger sleeve installed in your cylinder.

Replacement piston kit and gasket set to freshen up your BBR 150 motor. Includes piston, rings, wrist pin, clips, head gasket and base gasket. This piston will not fit in the stock cylinder.

Piston, Rings, Wrist Pin, Wrist Pin Bearings and Circlips included.

• This is a 2.41mm, oversized piston, so the cylinder will need to be bored.
• Displacement will go up to 675cc.

NOTE: A top end gasket set is required for installation.

• Includes pistons, ring sets, piston pins, retainer clips and head gasket
• Wiseco pistons are forged from aerospace aluminum alloys for reliable operation and longevity
• Hi-Compression pistons fit in the stock bore, providing a horsepower boost without the need for boring your cylinder
• Big Bore pistons requires boring/replating of the stock cylinder

All in one package.

• Hot Rods complete +4mm stroker crank assembly
• 94mm big bore cylinder and piston kit
• Complete gasket set with seals
• Includes new crank bearings

We suggest adding a set of HotCams camshafts and a new clutch kit for the best results.

The Complete Top End Performance Kit includes:

• 102.4mm Wiseco piston 9:1 compression (up from 8.3:1) with rings, wrist pin and circlips
• Stage 1 camshaft for more power
• Top end gasket set

This kit boosts your displacement from 644cc to 675cc. Your cylinder must be bored to fit the larger piston.

This is the little rubber plug on the right hand side of the cylinder head. Replace this plug to avoid having an oil leak after disassembling your top top end.

CNC machined from billet aluminum and then finished in a beautiful gunmetal color. These replace the factory automatic tensioners that can fail. These tensioners eliminate the timing problem that can be caused by the automatic devices. Also gets rid of the excessive tension and premature engine wear caused by the stock unit.

• Includes 2 tensioners, and gaskets

Solid reliability and easy installation. This manual tensioner is a good upgrade for any modified motor, especially if it is ridden hard.

A new gasket is included.
 

A Suzuki OEM gasket for the Cam Chain Tensioner. You are going to need it if you work on your starter motor. It is not a good idea to re-use this gasket. If it blows out, it will dump a large amount of oil onto your right foot.
 

Your automatic cam chain tensioner is spring loaded. This can make it difficult to install as it wants to extend before you have it bolted into place. This handy tool will back off the cam chain tensioner mechanism and hold it for you. No more awkward 3-handed contortions are required to get the tensioner installed.
 

A high quality cam chain from the folks at Wiseco. New cams, big bore kit, high-mileage motor, you might want to think about a new cam chain. Direct replacement for stock unit.

Includes degree wheel, dial-gauge, multi-position stand, extension, 3-sizes of positive-piston stops, and a handsome wooden carrying case.

High performance camshaft for the CRF150F 03'-05' and CRF230F. Higher lift and duration than stock.

• Adds 1+ HP to fully modified motor
• Makes more aggressive race-style of power
• Bike still starts easily and idles smooth

Designed to enhance mid-range and top-end power. Manufactured using the highest quality standards. No core required.

High performance camshaft for the KLX/DRZ110. Higher lift and duration than stock.

• Makes more aggressive "race" style of power
• Bike still starts easily and idles smooth

A brand new camshaft purpose built for the KLX140! The KLX140 is the ultimate trail bike. It just needs a little more power.

• Adds 1+ hp to fully modified motor (170cc Big Bore kit)
• Makes more aggressive race-style of power
• Bike still starts easily and idles smooth
• Same camshaft as used by the BBR Race Team
• No exchange required
• 92 octane ok

Note: The BBR KLX140 Performance Camshaft installs the same as the OEM camshaft (valve clearance IN: .002"-.003" / EX: .004"-.006"). We recommend you purchase an OEM Kawasaki KLX140 Service Manual to assist you when installing this camshaft.

• High performance racing camshaft
• No core required
• Designed to use stock valve springs and rockers in most applications
• Improved Throttle Response (ITR) technology

Stage 1 - Excellent mid-range and top-end power increase.

Uses stock valve springs and rockers.

• Exhaust Cam Lobe Duration at 1mm 258°
• Exhaust Cam Lobe Lift 8.800mm
• Exhaust Cam Valve Lash 0.200mm
• Intake Cam Lobe Lift 8.800mm
• Intake Cam Valve Lash 0.150mm
• Intake Lobe Duration at 1mm 258°

 Does not incorporate compression release.

Bolt on horsepower! Stage 1: single-cam motor. Excellent midrange and top-end power increase. Uses stock valve springs and rockers.

Fitment Specs: Exhaust Lift: 5.9; Exhaust Duration at 1.00mm: 223°; Intake Lift: 6.8; Intake Duration at 1.00mm: 227°

As the leader in innovation, design and development of aftermarket high-performance camshafts, Hot Cams is certain to provide the added boost that enthusiasts are looking for.

Designed, dyno proven and made in the USA, Hot Cams performance camshafts are one of the most economical, reliable and easy to install ways to add a 5-10% power gain to your bike.

Stage 1: These cams provide better low RPM torque, pulling power, and throttle response.

Stage 2: These cams will provide improved full throttle torque and horsepower starting at 4000 RPM and up.

A pair of stage 2 intake and exhaust 'drop-in' camshafts. Great mid-range and top-end increase. Uses stock valve springs. Modifying the airbox and rejetting will be required to realize power improvements with these cams. These are new billet cams - No core return required!

Excellent midrange and top-end increase. Uses stock valve springs and rockers.

• Our own #190 cam profile offers more lift to give better low-end and mid-range punch and more duration to keep the motor pulling hard in the upper RPMs.
• Our performance cams are reground from OEM camshafts - no core charge or return required.
• We recommend a high compression or big bore piston to get the most out of your performance camshaft.

We strongly recommend checking valve to piston clearance when installing a non-standard camshaft.

An upgrade over stock, these hard-welded premium rockers are highly recommended when upgrading your camshaft.

Kit includes all new OE adjuster screws and lock nuts.

Please see required core information below.

Need to remove your clutch assembly? This holder is the quickest and easiest tool out there to get a grip on that hard to handle hub. Laser cut to the exact pattern that EBC makes their clutch plates from, it makes loosening and re-tightening the clutch nut easy. All of that and no worries about doing any damage to your expensive clutch hub.

Convenient tool to hold the clutch basket when servicing your clutch

This holder is the quickest and easiest tool out there to get a grip on that hard to handle hub.

Laser cut to the exact pattern that EBC makes their clutch plates from, it makes loosening and re-tightening the clutch nut a breeze, and minimizes the likelihood of damaging the clutch hub.

Need to remove your clutch assembly to get at that dreaded neutral safety switch? This holder is the quickest and easiest tool out there to get a grip on that hard to handle hub. Laser cut to the exact pattern that EBC makes their clutch plates from, it makes loosening and re-tightening the clutch nut easy. All of that and no worries about doing any damage to your expensive clutch hub.

Bottom line, if you have to hold your clutch hub to remove it, there is no better way to do it.

Made from medium carbon steel with hardened jaws. It features spanner pins and the jaws open up to 5" wide. It's ideal for holding clutch hubs, flywheels, gears, sprockets, etc. Made by Motion Pro.

This tool helps ease the pain of accessing the neutral safety switch. This holder is the quickest and easiest tool out there to get a grip on that hard to handle hub.

Laser cut to the exact pattern that EBC makes their clutch plates from, it makes loosening and re-tightening the clutch nut a breeze, and minimizes the likelihood of damaging the clutch hub.

Our kit includes 5 EBC friction plates which eliminates the judder spring assembly by replacing it with a 5th friction plate.

Heavy duty clutch springs by Barnett are included it this kit which will significantly decrease wear under high stress conditions.

Kit includes friction plates and drive plates.

• Hardened steel drive plates Steel clutch plates won’t expand or deform like aluminum drive clutch plates
• 3 times the life of the stock clutch plates

Complete set of clutch friction plates for your V-Strom.

• High quality EBC friction plates
• Genuine Yamaha drive plates
• High performance springs by KG Power Sports

From Barnett, the number one name in motorcycle clutches since 1948, we now offer a complete high performance clutch set. This includes Kevlar friction plates, steel drive plates and stronger springs.

Since 1948, Barnett clutch plates and springs have been made from the finest materials available.

• 6 Kevlar friction plates
• 5 Steel drive plates
• Clutch springs
• Clutch cover gasket

Barnett high performance clutch set. Includes 8 Kevlar friction plates, the 7 'loose' steel drive plates, stronger springs and a high quality clutch cover gasket.
 

Designed to improve the life and durability of your clutch, Barnett's "Dirt Digger" provides better rideability with less slippage compared to stock.

• Carbon fiber friction plates
• Tempered steel drive plates go through a vibratory de-burring process and then are quality checked for flatness to provide optimum performance.
• Heavy duty clutch springs are pre-set, shot-peened, and heat treated for performance and durability.

Barnett high performance clutch kit includes drive plates, carbon fiber friction plates, and heavy duty springs.

Designed to improve the life and durability of your clutch, Barnett's "Dirt Digger" provides better rideability with less slippage compared to stock.

• Kevlar friction plates
• Tempered steel drive plates go through a vibratory de-burring process and then are quality checked for flatness to provide optimum performance.
• Heavy duty clutch springs are pre-set, shot-peened, and heat treated for performance and durability.

Replace your worn clutch plates and springs to reduce fade and slip.

• Complete set of friction plates, steel plates, and springs
• Heavy-duty springs help prevent clutch slip
• Restores proper stack height, fixes clutch slip caused by wear and tear

• The Core Manual TorqDrive clutch delivers unprecedented performance, tuning and durability
• TorqDrive provides more disks in less space, allowing up to four additional friction disks over stock
• More frictions = more torque capacity, thus unlocking the full power of your engine without the need to add stiffer pressure plate springs
• Provides more consistent clutch lever feel and behavior
• Can be set up to maintain a stock, or lighter than stock, lever pull depending on engine tuning
• Rekluse sleeves eliminate basket wear and notching
• Proven in racing at the highest levels
• Made in the U.S.A.

Replace your worn out clutch with a high quality Clutch Kit. This kit includes new friction discs for your clutch pack.

Please note: kit includes friction discs only, steel plates and springs not included.

A full set of EBC friction plates. Make sure to order a new gasket as well.

• Complete set of friction plates, steel plates, and springs
• Heavy-duty springs help prevent clutch slip
• Restores proper stack height, fixes clutch slip caused by wear and tear

• Complete set of friction plates, steel plates, and springs
• Heavy-duty springs help prevent clutch slip
• Restores proper stack height, fixes clutch slip caused by wear and tear

The Dirt Racer Complete Clutch Rebuild Kit is the ultimate package for your Yamaha, here's why:

'Stack Height' is the all important factor when renewing a clutch and riders are always best to buy a complete kit instead of separate single plates as sold by manufacturers. Replacing just the worn plate (or plates) may not even get close to rebuilding your clutch to its original stack height and all you get is clutch slip and the job has to be done again.

• Complete set of stack height controlled anti-swell friction plates
• The friction plates are forged allow with wide "Ear" construction to spread the load in the clutch basket and prevent "Dogging" (when the ears cut into the allow clutch basket) which causes a rough clutch, promotes slippage plus it ruins an expensive part of your engine
• EBC unique alloy article impregnated clutch facings that wear longer and resist burning
• 15% stronger heavy duty, shot peened clutch springs to clamp those plates together firm and strong for the life of your clutch

Complete set of friction plates, HD springs and steel separator plates prevent premature driven plate wear, oil muddying and loss of stack height.

Built with swaged aluminum carriers that spread the load on the clutch basket and prevent clutch basket "dogging".

Anti-swell, alloy impregnated heavy-duty, cork-based facings for smooth clutch take-up, and allows engagement modulation, unlike paper clutches which tend to snatch.

Complete set of friction plates, HD springs and steel separator plates prevent premature driven plate wear, oil muddying and loss of stack height. Built with swaged aluminum carriers that spread the load on the clutch basket and prevent clutch basket "dogging". Anti-swell, alloy impregnated heavy-duty facings for smooth clutch action. Allows modulation, unlike paper clutches which tend to snatch. Don't forget to add a fresh gasket.

Complete set of friction plates, HD springs and steel separator plates prevent premature driven plate wear, oil muddying and loss of stack height. Built with swaged aluminum carriers that spread the load on the clutch basket and prevent clutch basket "dogging". Anti-swell, alloy impregnated heavy-duty cork-based facings for smooth clutch take-up. Allows modulation, unlike paper clutches which tend to snatch.

Complete set of friction plates, HD springs and steel separator plates prevent premature driven plate wear, oil muddying and loss of stack height. Built with swaged aluminum carriers that spread the load on the clutch basket and prevent clutch basket "dogging". Anti-swell, alloy impregnated heavy-duty facings for smooth clutch action. Allows modulation, unlike paper clutches which tend to snatch. Don't forget to add a fresh gasket.

Hinson Clutch Plates available as a set of just Fiber Plates or just Steel Plates or as a complete set including both.

Hinson Clutch Components sells the best clutch components available in the world. Hinson equipped machines have won 224 National and World Championships in our 20 years of business.

• Optimum hook up with minimum heat build up provides high performance
• Developed with and recommended to enhance the performance of Hinson clutch baskets, inner hubs, and pressure plates
• Exceptional production tolerances and flatness
• All fiber plates use organic non-abrasive materials to avoid damage to rest of motor as plate materials break down and are circulated through engine by oil
• Can be used with OEM baskets, inner hubs, and pressure plate

Includes genuine Honda friction plates, drive plates, and clutch springs.

Top quality friction plates, steel plates and heavy duty springs from Dunlop. Don't forget to use a new clutch cover gasket.
 

The Rekluse EXP employs the same EXP assembly as their premier product; the difference is that it fits into your stock clutch assembly, saving you money! Now you can enjoy the benefits of Rekluse auto-clutch technology on your KLR.

An auto-clutch automatically feeds out the engagement of the clutch using centrifugal force. This allows you to start and stop without touching the clutch lever. The automatic feed is fully adjustable to suit the rider's needs while retaining full manual override with the clutch lever. This automatic feed delivers easier on/off throttle transitions, improved traction, better control, and more confidence.

RadiusX is a high performance centrifugal auto clutch combining our TorqDrive and EXP technologies. TorqDrive provides more clutch disks in less space, allowing for maximum performance within your bike’s existing clutch footprint. You retain full control of shifting and use of your clutch lever with no compromise in power delivery.

Features:

• Dead-on clutch engagement every time
• Take off and stop in gear without using clutch lever – no more stalls
• Experience maximum power delivery
• Confidently navigate traffic and slow speed conditions
• TorqDrive® clutch pack delivers higher torque capacity and increased power transfer
• Rekluse sleeves eliminate basket wear and notching
• Standard clutch lever function with full override
• No modification to stock components
• Shifting transmission remains unchanged (clutch lever use is recommended for shifting)

This kit includes one OEM drive plate retaining wire & one OEM inner steel drive plate. 

If you've ever changed the clutch on a DR650 you will be familiar with the extra steel plate at the bottom of the stack that is locked in place by a very thin metal wire. 

Generally, when you do a clutch replacement on the DR650, you do not need to remove or replace these items. If you do need to (or if you have already) you will come to realize this wire is not very strong and is prone to breaking if not treated with care during the removal / installation process.

Heavy-Duty clutch springs

• 15% stiffer than original
• Minimize clutch slip
• Reduce plate wear
• Improve power to ground

• 15% stiffer than original
• Minimize clutch slip
• Reduce plate wear
• Improve power to ground

Barnett clutch springs are made from the finest materials available.

Heavy Duty Barnett clutch springs are pre-set, shot-peened, and heat treated for performance and durability.
 

Heavy duty springs help prevent clutch slip in high-performance motors.

• Custom wound from chrome-silicon wire
• Preset for long life
• Higher spring seat pressure to resist clutch slip

Heavy duty springs help prevent clutch slip in high-performance motors.

• Custom wound from chrome-silicon wire
• Preset for long life
• Higher spring seat pressure to resist clutch slip

Heavy duty springs help prevent clutch slip in high-performance motors.

• Custom wound from chrome-silicon wire
• Preset for long life
• Higher spring seat pressure to resist clutch slip

Heavy-duty springs help prevent clutch slip in high-performance motors.

• Custom wound from chrome-silicon wire
• Preset for long life
• Higher spring seat pressure to resist clutch slip

Dragging clutch? Hard to find neutral? Maybe it feels like it doesn't fully release. These problems can be caused by worn thrust washers in the clutch assembly. Most DR650s show wear on these items. Kit includes #1, #2 and #3 in the diagram.
 

This is a genuine Suzuki part. We recommend installing a countershaft seal retainer to prevent the countershaft seal from popping out while riding.

Here's another item you might want to replace when you are changing out your front sprocket. Because of it's big back tire, the chain is further away from the center of the engine than most bikes. The engineers at Yamaha decided they had better support the end of the countershaft since it is cantilevered out there so far. They also figured they had better feed some oil out there as well. These Countershaft Seals keep that oil where it belongs, lubricating the countershaft outer support.

OEM Suzuki seal retainer for the DR650. Simple insurance against your countershaft seal popping out of its bore.

This is not a common problem but for those folks who have had the seal come out it has proven to be quite difficult to get it to stay in place. This steel retainer eliminates any possibility of the seal coming out and ruining your day by coating your rear tire with oil.

This tool is designed to separate vertically split crank case halves on two and four stroke engines. Adjustable arms allow it to be used on multiple bolt patterns found on a variety of makes and models of motorcycles. Industrial grade steel construction with black oxide finish for long service life. Comes with 8mm mounting bolts and 6mm adapters. Protective carrying case included.

This is a completely rebuildable stroker crank (3mm additional stroke) turns your mild mannered 250cc motor into a 263cc trail shredding monster! OK, maybe not, but sure makes it a fun machine.

Want the COMPLETE package? Order a Big-Bore kit to go with your stroker! That will give you a 308cc ripper! That is 24% larger than the stock 250. This package includes the Athena Big Bore Kit plus the 3mm Hot Rods Stroker Crank with new Genuine Yamaha crank bearings.

You will need to tune your EFI with something like the Power Commander V to get the most out of your Stroker kit.

• Hot Rods complete stroker crank assembly includes +4mm stroke for maximum power and performance output.
• Hot Rods constructs their complete stroker crank assembly to meet or exceed OEM specifications for maximum durability.
• Hot Rods stroker cranks are completely rebuildable and have been trued to within 0.001" from the factory.
• The Hot Rods stroker crank increases the stock displacement to 424cc when used with the stock bore piston or 462cc when used with a 94mm big bore kit.
• Main bearings sold separately.

This Will Not Fit The DRZ400 Kick Start Models Nothing Available For The Kick Start Models

New Bearings for your DRZ400.

If you are in the lower end doing work, new bearings are cheap insurance for all that hard work.

Complete Doohickey Replacement Kit now includes the outside cover gasket. Complete kit includes:

• Doohickey from Eagle Manufacturing (No longer includes extension springs.  The torsion spring is far superior)
• Torsion spring with drill bit
• Wrench to hold the rotor
• Puller to remove the rotor
• Replacement bolt for rotor
• Generator cover gasket
• Left side outer cover gasket