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Engine

Big Bore

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
Ships in 3-5 business days
$320.95

Cam

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

Note: This camshaft has been designed to work with the OEM Yamaha piston, or the BBR big bore kit piston, with OEM sized valves. Any other combination of parts will require that you manually check valve to piston clearance.

Please contact us for availability information
$178.95

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°

Ships in 3-5 business days
$229.95

Clutch

TTR125LE '03 - '26

Replacement friction plates and drive plates.

  • Pro Friction Discs use specially blended cork-based materials that are designed and manufactured to meet or exceed OEM clutch requirements
Choose Option
Add Clutch Holding Tool, EBC
Ships same business day
$25.95

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
Ships in 3-5 business days
$41.95
TTR125LE '03 - '26

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.
Add Clutch Holding Tool, EBC
Ships same business day
$132.95

Clutch, Engine & Maintenance

TTR125LE '03 - '26

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.

Ships in 3-5 business days
$24.95

Drain Plug

TTR125LE '03 - '26
  • 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
Choose Color
Please contact us for availability information
$25.95

Engine & Maintenance

TTR125LE '03 - '26

Universal 3 bolt flywheel puller.

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

Ships in 3-5 business days
$79.95

Gasket

TTR125LE '03 - '04

High quality stator cover gasket. Genuine Yamaha part.

Choose Year
Add Gasket Remover
Ships same business day
$10.95

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

Add Gasket Remover
Ships in 3-5 business days
$26.95
TTR125LE '03 - '04

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

Choose Year
Add Gasket Remover
Ships in 1-2 weeks
$25.95

Repair Manuals

TTR125LE '04 - '17

This Clymer Repair Manual is an essential resource for anyone looking to service or repair their motorcycle at home. Whether you're riding at the weekend or using your bike for a daily commute, you don't want your plans disrupted - performing regular maintenance is crucial to keep things running smoothly.

Every Clymer workshop manual is the result of a full stripdown and rebuild, allowing you to really know the detail behind your bike. Alongside step-by-step instructions and expert advice, you'll find a wealth of images that help to guide you through repairs and servicing tasks, even on small and complex parts.

What's Included

  • Step-by-step instructions based on a full stripdown and rebuild of the bike
  • Tips and techniques written by Clymer's motorcycle experts
  • A time saving troubleshooting guide with common issues for your motorcycle
  • Wiring diagrams for key vehicle systems
  • Pictures and illustrations to make tricky jobs easier
  • A printed book, dispatched from our US warehouse

(This manual's year range represents the years of coverage available when the manual was written. The vehicle or machine's production years may extend beyond these dates.)

Ships in 3-5 business days
$51.95

Spark Plug

TTR125LE '03 - '26

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
Add Anti-Seize
Ships same business day
$3.95

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!
Ships in 3-5 business days
$344.95