Hop Up Kit - GX240 - GX270 - GX340 - GX390, 420 Predators and 13/15hp, Stage 1
Basic kit for improving the performance of GX270, 390s, and Chinese OHVs. Simple to install, you can expect significant performance increases.
Stage 1 Kit includes
- Race/Open Air Filter & Adapter,
HD Valve Springs
Offset Timing Key,
Choke Hold Down Bracket
- Optional Carbs (includes insulators)
Picture for reference only and may show optional parts. See above description for actual content.
Header not included unless specified.
Filter should be sprayed with K&N type oil, especially in dirt applications. Oil not included click here
Billet Aluminum flywheel recommended. Stock flywheels, esp "Clone" are prone to failure and very DANGEROUS
Note: UT2s series Hondas (2012 & up) or later have a built in Rev Limiter in the coil and will require a new coil to exceed 4000 rpm. The UT2 coils (4 wire) can only be used with stock flywheels.
If using a Billet Flywheel, you must run a UT1 style coil (single wire).
13/15 Chinese Engines (414, 420, 460) usually have UT1 style coils already. However some Lifans and 420s have a digital ignition and will need a Honda UT1 coil to run t he billet flywheel.