  ***NEW**Race head for 88cc (52mm) bore kits - NEW Race Head – Larger valves (now 25/22mm) and better flow for increased performance. Also has bigger cooling fins. Includes all necessary parts and comes assembled! - 52mm piston with rings, pin, & clips. - Head gasket kit. It has 25/22mm valves with better porting/flow. We also kept the combustion chamber the same size and changed the angle of the valves slightly. *****This kit is for upgrading 88cc bore Race head. You should have your existing cylinder honed (unless its new) prior to installing this kit. And have a TBW0300 Race Head Camshaft. We recommend purchasing a high volume oil pump kit (available in this section). Installation Note: It will save a lot of time and effort if the oil pump is installed while installing the bore kit (requires cylinder removal). NOTE: Trail bikes does not offer any installation instructions with there products. Kit includes: TBW0365, TBW0206, and TBW0385 |
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