TBparts V2 Race Head Kit for YX125 & YX140 – High Performance Upgrade

Unlock next-level performance with the TBparts V2 Race Head Kit for YX125 & YX140 engines. Engineered for riders demanding serious power and faster revs, this kit features a high-flow V2 cylinder head with 28.5mm intake and 23.5mm exhaust stainless steel valves (21-4N), precision porting, a race camshaft, and forged aluminum roller rocker arms for maximum efficiency and durability.
Designed to bolt on with ease for experienced builders, this kit transforms your engine into a track-ready machine without breaking the bank. The package includes a race camshaft and 57mm top-end gasket kit, with all necessary valve seals and springs pre-installed. Replacement parts are always in stock—no long waits or high prices.

Note: This is not a complete bolt-on kit. You'll need a compatible piston, cylinder, and cam gear. If you’re unfamiliar with engine work, professional installation is highly recommended.