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Hop Up Kit - GX390 and 13/15hp OHV, Stage 3
Hop Up Kit - GX390 and 13/15hp OHV, Stage 3


 
Our Price: $377.00

Stock Status:In Stock
Part #: STAGE3KIT390

Select Flywheel

No Flywheel
Add Aluminum Flywheel - Recoil Start [+$166]
Add Aluminum Flywheel - Electric Start [+$202]
Ignition Coil Option

Add UT2 Coil w/o Rev Limiter, for UT2 Hondas Only [+$66]
Add Genuine Honda UT1 Coil [+$36]
None Included
Header & Exhaust Options

No Exhaust
Add Header, Kart & Mini-Bike [+$41]
Add Mud Motor Header & Muffler (390) [+$48]

Qty:
Description -
 

As step up from the Stage 2, this kit is designed towake up 390s allowing 20+ hp

Includes

Race/Open Air Filter & Adapter

  • 24mm Race carb (Bored
  • HD Valve Springs
  • Offset Timing Key
  • 280 Lift Cam
  • Reinforced Rockers
  • Billet Rod +(.040 longer)
  • Carb and Side Cover Gaskets
  • Optional Header/Exhaust
  • Optional Aluminum Flywheel

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

Note: Use of the Choke Bracket requires use of a stock Honda (or Chinese OHV) "Air Filter to Carb Gasket". This is not included in the kit. You can use the one that came with the motor, or can purchase one at

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.

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