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Hop Up Kit; GX240, GX270, 9/11hp OHV, & 301; Stage 3
Hop Up Kit; GX240, GX270, 9/11hp OHV, & 301; Stage 3

Our Price: $345.00

Stock Status:In Stock

Part #: STAGE3KIT270

Select Flywheel

Add Aluminum Flywheel - Recoil Start [+$194]
No Flywheel
Ignition Coil Option

Add UT2 Coil without 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 (GX390) [+$46]

Description -
Stage 3 Hop Up Kit for GX240, GX270, 9/11hp OHV, and 301s
A step up from our Stage 2 kit, this is designed to improve the power and durability of GX240s and GX270s.

  • Race/Open Air Filter & Adapter
  • 390 Race Carb (Includes Insulator & Studs)
  • Heavy Duty Valve Springs
  • Offset Timing Key
  • 280 Lift Cam
  • Reinforced Rockers
  • Billet Rod
  • Carb and Side Cover Gaskets
  • Optional Header/Exhaust
  • Optional Aluminum Flywheel
  • Optional Ignition Coil

Use of the choke bracket requires 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 you may purchase one here.

UT2 series Hondas (2012 & up) have a built-in rev limiter in the coil and will require a new coil to exceed 4000rpm. 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), but most 301s have standard cam journals (same as GX270s). If you have a 301, we recommend you measure your cam journals before ordering this!

Filter should be sprayed with a K&N type oil, especially for dirt applications. Oil is not included - click here to purchase.

Although optional, a billet aluminum flywheel is recommended. Stock flywheels, especially "clones", are prone to failure and are dangerous.

Pictures are for reference only and may show optional parts. Please see above description for actual contents.

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