Home > Engine Family >

Hop Up Kit - GX240 - GX270 and 8/9hp Chinese OHV, Stage 3
Hop Up Kit - GX240 - GX270 and 8/9hp Chinese OHV, Stage 3


 
Our Price: $399.99

Stock Status:In Stock
Part #: STAGE3KIT270

Choose Engine Type

GX240
GX270
301 Predator with small journal cam
301 Predator & LCT with large journal cam [ $40]
Select Carburator

GX390 Carb - Gas
GX390 Bored - Gas [+$35]
GX390 Bored - Methanol [+$55]
28mm Flat Slide Mikuni - Gas [+$115]
28mm Flat Slide Mikuni - Methanol [+$135]
Header & Exhaust Options

No Exhaust
Add Header, Kart & Mini-Bike [+$35]
Add Header, Muffler, and Clamp: Kart & Mini-Bikes [+$80]
Add Mud Motor Header & Muffler (390) [+$35]
Select Rocker Arm Type

Reinforced
Reinforced 1.1
1.2 Billet Roller Tip, includes CM Pushrods & Guide Plate [+$90]
Select Camshaft

280 RPM (Med to large tracks, 7000+ )
280 TQ (Hi Torque, Small tracks, 6000 rpm)
306 TQ (Small Tracks)
280 Marine (Super Low end,5000 rpm)
306 RPM (Med to large tracks) BEST
Select Flywheel

No Flywheel
Add Aluminum Flywheel - Recoil Start [+$180]
Additional Options

Add UT2 Coil w/o Rev Limiter, for UT2 Hondas Only [+$70]

Qty:
Description -
 

As step up from the Stage 2, this kit is designed to improve the power for the GX340s and GX390s along with improving the durability.


Includes:


  • Race/Open Air Filter & Adapter

  • Choice of Carbs

  • HD Valve Springs

  • Offset Timing Key

  • 280 Lift Cam

  • Reinforced Rockers

  • Billet Rod

  • 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

    http://www.nrracing.com/product-p/16220-za0-702.htm


    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).

    Chinese Engines usually have UT1 style coils already. However some Lifans and 420s have a digital ignition and will need a Honda UT1 coil to run the billet flywheel.

    If ordering for a 301, be aware some engines have large Cam Journals (.6357), most 301s have standard cam journals (same as GX270s). If you have a 301, we recommend you measure your cam journals before ordering this. (if in doubt, order the small journal).



Share your knowledge of this product. Be the first to write a review »