Home > Hop Up Kits > GX390, GX340, 420 Predator, & 11 hp up Chinese OHV > Stage 1
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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,
  • Honda Jet for application,
  • Choke Hold Down Bracket
  • Optional Header/Exhaust
  • Optional Carbs (includes insulators)

Picture for reference only and may show optional parts. See above description for actual content.
Header not included unless specified.

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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
.

Our Price: $43.99