TTR125: Engine

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

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

This kit provides much of the performance gain of our 130 kit but keeps you legal for racing classes that do not allow motors over 125cc.

• Stock bore size Wiseco 54mm high compression 11:1 piston, rings, wrist pin, and clips
• HotCams stage 1 performance camshaft
• Includes top end gasket set
• Piston fits into the stock bore; requires no modification to your cylinder!

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

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°

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.

Replacement friction plates and drive plates.

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

If you need a new clutch, you probably need a new gasket to seal that cover when you are all done. Genuine Yamaha part.

High quality stator cover gasket. Genuine Yamaha part.

A head gasket and base gasket to fit the Big Bore cylinder.

GoldPlug is the gold standard in engine protection.

Stainless steel drain plug with an extremely strong magnet that picks up metal flakes in your oil.

12mm Thread, 17mm Head.

• Bolts are CNC-machined from high-quality aluminum
• Embedded magnet helps keep bolt in place
• Pre-drilled holes make for easy installation of safety wires

Hardened chrome vanadium steel with built in rubber insert to hold spark plug steady.

Thin wall bi-hex sockets designed to access narrow spark plug holes.

Fits 3/8" square drive and hex drive, 14mm, 16mm, 18mm, 21mm.

Keep your motor running right with fresh spark plugs!

NGK is one of the world's largest manufacturer of spark plugs, whose products are used as original equipment (OE) on countless motorcycle and automobile models.

• High-quality materials and superior construction for serious power and reliability
  • Pure alumina silicate ceramic insulator provides high strength and better heat transfer
  • Deep-seated copper core for a wider heat range
  • Nickel alloy tip for longer life
  • Trivalent metal plating provides superior anti-corrosion and anti-seizing properties
• Choosing the right high-quality plugs prevents fouling from running too cool and preignition from running too hot
• NGK plugs available for almost every application and riding style

Clymer manuals are the most user-friendly repair manuals. They are written for the do-it-yourself-er as well as the experienced mechanic by industry experts. Step-by-step instructions based on the complete disassembly of the machine.

With a Haynes manual, you can do it yourself…from simple maintenance to basic repairs. Haynes writes every book based on a complete teardown of the motorcycle. Haynes books have clear instructions and plenty of photographs that show each step.

• Step-by-step procedures
• Easy-to-follow photos
• Complete troubleshooting section
• Valuable short cuts
• Color spark plug diagnosis

Complete coverage for your Yamaha Trail Bikes covering PW, RT, TT-R and XT225/350 models for 1981 thru 2000.

• Contains degree wheel, standard unit indicator, adjustable magnetic stand, and three positive stops (10 mm, 12 mm and 14 mm threads)
• Can be used to install and adjust timing of any cam
• Wooden carrying case

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.

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 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.

Universal 3 bolt flywheel puller.

Complete with hardware kit and adapter for male or female removal.

For easy removal of recessed oil filters.

Conical point screws pierces and grabs the metal end cap of the filter.

reduces potential damage to the engine cases.

NOT for use on re-usable oil filters.

A 3-pack of easy to apply strips measure the temperature of engine, suspension, and radiator components. Temperature range 149° to 248°

Thread Chasers are designed to clean and re-cut damaged aluminum threads.

This kit contains the two sizes most common on metric motorcycles, M6x1.0 and M8x1.25.

Thread Chasers also remove dirt and metal shavings that become captured in thread grooves.

Uses 8mm or 10mm hex sockets, a Must for all tool kits.

• 26 straight blades
• SAE and metric markings
• Check for clearance on valves, ignition points etc.
• Includes 26 blades varying in thickness from .0015"/.038 mm to .025"/.635 mm