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).