TBparts V2 Race Head Kit & 54mm/114cc Bore Kit. Converts the following stock model/engines to 114cc: TRX90 & Chinese 86cc – 107/110cc (49.5mm Stroke)

Want to double the power of your TRX90 or Chinese 86-107cc engine?! Start with the V2 cylinder head’s larger stainless steel (21-4N) valves, better porting, roller cam, and forged aluminum roller rocker arms that allow the engine to rev quicker, farther, and make much more power than the stock setup. Add the high compression 54mm bore kit that brings up the bore to 114cc and makes for a strong power band adding up to a professional level of performance at an affordable price for the privateer rider. These are high quality parts and require no machining to the cases or other modifications – bolt on and go! There are no installation instructions, but if you can replace your piston, you can install this kit. If you don’t have any experience working on your engine, we highly recommend having a professional technician install this kit or, at a minimum, purchasing the shop manual.

Key Features:

• Race Head V2 – Aluminum roller rockers, 28.5mm intake valve, 23.5mm exhaust valve, 26mm intake port, 23mm exhaust port, covers and hardware included (valve, seals, and springs installed).
• Race Camshaft
• 54x69mm 114cc Aluminum Steel Sleeve Cylinder
• 54mm/114cc High Compression Light Weight Piston Kit (91+ octane pump fuel friendly)
• 114cc Top End Gasket Kit
• No case boring

Note: This kit is for TRX90 & Chinese 86cc – 107cc engines with a 49.5mm Stroke ONLY

Kit Contents by Part Number: TBW0750, TBW0755, TBW0752, TBW1441, TBW0788, TBW0859, TBW0721