Engine

WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

Air Injection Block Off Plate, Driven Billet

CRF250L '13 - '20 CRF250L Rally '17 - '20
$46.95

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.

WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

Big Bore Kit, 130cc BBR

KLX110 '02 - '20 DRZ110 '03 - '05
$109.95

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
WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

Big Bore Kit, 160cc BBR

KLX110 '02 - '20 DRZ110 '03 - '05
$199.95

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
WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

Big Bore Kit, 175cc BBR

CRF150F '03 - '05
$289.95

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

 

    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

    Big Bore Kit, 195cc BBR

    CRF150F '06 - '20
    $249.95

    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
    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

    Big Bore Kit, 240cc BBR

    CRF230F '03 - '20
    $299.95

    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
    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

    Big Bore Kit, 290cc Athena

    WR250R '08 - '18 WR250X '08 - '11
    Add EFI Programmer, Dynojet Power Commander V
    $989.95
    • 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.

    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

    Big Bore Kit, 300cc Wiseco

    XT250 '13 - '20
    $399.95

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

    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

    Big Bore Kit, 385cc

    DR350 '90 - '99 DR350S '90 - '99 DR350SE '90 - '99
    $189.95

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

    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

    Big Bore Kit, 434cc Cylinder Works

    DRZ400 '00 - '03 DRZ400S '01 - '20 DRZ400SM '05 - '20 DRZ400E '00 - '07
    $629.95
    • 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
    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

    Big Bore Kit, 440cc

    DR350 '90 - '99 DR350S '90 - '99 DR350SE '90 - '99
    $369.95

    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.

    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

    Big Bore Kit, 440cc Athena

    DRZ400 '00 - '20 DRZ400S '00 - '20 DRZ400E '00 - '20 DRZ400SM '05 - '20
    $789.95
    • 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
    • Includes all necessary Rings, Clips, and Gaskets.
    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

    Big Bore Kit, 660cc Wiseco

    DR650 '90 - '95
    $268.95

    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.

    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

    Big Bore Kit, 677cc

    SV650 '99 - '06
    $449.95

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

    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

    Big Bore Kit, 700cc

    SV650 '99 - '06
    $449.95

    3mm oversize. Requires cylinder boring only. 12:1 compression. Includes pistons, rings, pins, clips and head gaskets.

    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Made in USA ProCycle Approved

    Big Bore Kit, 790cc

    DR650 '96 - '20
    Sleeve/Cylinder Options
    $699.95

    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.

    Cylinders with 790 sleeves installed are 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.

    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

    Big Bore Kit w/ Camshaft, 120cc BBR

    XR100 '81 - '20 CRF100 '81 - '20
    $329.95

    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
    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

    Big Bore Kit w/ Camshaft, 130cc

    TTR125 '00 - '20
    $289.95

    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
    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

    Big Bore Kit w/ Camshaft, 143cc BBR

    KLX110 '02 - '09 DRZ110 '03 - '05
    Choose Year
    $359.95

    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
    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

    Big Bore Kit w/ Camshaft, 150cc

    DRZ125 '03 - '20 KLX125 '03 - '06
    $329.95

    Bores into the stock cylinder - no re-sleeving necessary.

    • Wiseco 61mm high compression 11:1 piston, rings, wrist pin, and clips
    • Performance camshaft
    • Includes top end gasket set
    • Requires cylinder to be bored to fit the larger piston
    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

    Big Bore Kit w/ Camshaft, 150cc BBR

    TTR125 '00 - '20
    $369.95

    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
    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

    Big Bore Kit w/ Camshaft, 285cc

    XR250R '96 - '04
    $439.95

    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.

    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

    Big Bore Kit w/ Camshaft, 425cc

    XR400R '96 - '04
    $429.95

    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.

    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

    Big Bore Kit w/ Stage 3 Camshaft, 440cc High Compression

    XR400R '96 - '04
    $539.95

    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.

    Big Bore Kit w/Camshaft, 440cc

    XR400R '96 - '04
    $519.95

    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.

    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

    Big Bore Piston & Gaskets, 150cc BBR

    TTR125 '00 - '20
    $155.95

    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.

    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

    Big Bore Piston Kit, 675cc Wiseco

    XR650L '97 - '20
    Add Gasket Set, Top End
    $199.95

    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.

    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

    Big Bore Piston Kit, High-Compression Wiseco

    CRF150R '07 - '09
    Choose Bore Size/ Compression
    $185.95
    • 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
    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

    Big Bore Stroker Kit, DRZ462

    DRZ400 '00 - '03 DRZ400S '00 - '20 DRZ400SM '05 - '20 DRZ400E '00 - '07
    $1,099.00

    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.

    WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

    Big Bore Top End Performance Kit

    XR650L '93 - '20
    $399.95

    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.