Hot Rods Transmission Bearing Kit TBK0105 — Yamaha YZ250F / YZ250FX / WR250F 2014-2019

Product Description

Note: This kit includes transmission-specific bearings only; it does not include the water pump bearing, counter balancer bearings, or engine oil seal kit.

Rebuild your gearbox with ultimate confidence and eliminate sloppy shifting with the Hot Rods Transmission Bearing Kit. When spliting your crankcases for an engine overhaul or transmission gear repair, replacing your high-hour bearings is mandatory to prevent premature failures. This kit is a heavy-duty transmission replacement solution engineered to withstand the relentless high-RPM loads, hard shifting, and massive torque outputs delivered by modern Yamaha 250cc four-stroke platforms.

This premium overhaul kit contains trusted, precision-manufactured Hot Rods bearings explicitly selected for the primary and secondary shafts of the transmission. It also includes the specialized needle bearing for the shift drum, along with a fresh output shaft collar and washer to round out the installation. Built to meet strict factory tolerances, this kit ensures silky-smooth gear engagement, reduces internal friction drag, and keeps your shafts spinning perfectly true under severe racing conditions.

Top Features: Hot Rods Transmission Bearing Kit
o Comprehensive kit containing trusted Hot Rods bearings for the primary and secondary transmission shafts.
o Includes the specialized precision needle bearing necessary for smooth shift drum rotation.
o Supplied complete with a replacement high-grade output shaft collar and vital lock washer.
o An absolute must-have package for any new transmission repair, gear swap, or engine case replacement.

Please review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.

Fitment List

Frequently Asked Questions

Q: Does this kit include all the engine bearings needed to split the cases?
A: No, this kit is highly specialized for the gearbox layout. It includes the primary and secondary transmission shaft bearings, shift drum needle bearing, and output collar hardware. It does not include crankshaft main bearings, counter balancer bearings, or water pump bearings.

Q: Why should I replace my transmission bearings if they still spin?
A: Transmission bearings undergo extreme side loads during aggressive shifts. Over time, microscopic pitting and ball wear occur, which can cause shaft deflection. This deflection misaligns gear engagement, leading to rounded engagement dogs and skipped gears.

Q: Are the collars and washers included in this package up to factory quality standards?
A: Yes, Hot Rods builds all their collars and washers out of hardened steel to ensure they resist grooving from the countershaft sprocket seal and hold proper torque settings over hours of hard riding.

Expert Pro-Tip: When installing new transmission bearings into aluminum case halves, never try to force them in cold with a standard hammer or punch—you will gall the bearing journals and permanently ruin the case alignment. Instead, utilize thermal expansion: clean the case halves completely, place them in an oven at 250°F (120°C) for about 15 to 20 minutes, and keep your new bearings in the freezer. The heated case journals will expand slightly, and the frozen bearings will drop right into position effortlessly with minimal force required.

Recommended Pairings:
o Yamaha YZ250F / YZ250FX Performance Parts & Upgrades
o Yamaha 4-Stroke Performance Parts
o Premium Case Splitter & Trans Tools

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