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Basic kit for improving the performance of GX270 & 270/301cc OHVs. Simple to install, you can expect significant performance increases.
Stage 1 Kit includes
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 have Rev Limited coils and will require a new coil to exceed 4000 rpm. The UT2 coils (4 wire) can only be used with stock flywheels. If billet Flywheels, you must run a UT1 style coil (single wire). Most “clones” & 301s have UT1 style coils already (However some Lifans have a rev-limited digital ignition)
Step up from the Stage 1, this kit is designed to further improve the power for the GX240s and GX270s by adding a larger carb and cam.
Includes:
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
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).
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.
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
For building a serious a GX270 or 301, the 4 kit starts with package similar to that of the stage 3 kit but adds a Ported and Milled Head with stainless, stainless valves, stud kit, & HD valve train components.
