460cc Go Kart Racing Engine - DIY Assembly
**OUT OF STOCK UNTIL 9/14/19**
These engines are custom made to our specifications and are the only 458cc Honda GX390 "big bore clones" available for purchase in the United States.
- Heavy Duty 10-Bolt Engine Block (Modified Extra-Thick & Reinforced Casting) - The strongest clone engine block on the market!
- 92mm Bore x 69mm Stroke
- Billet 4.51" Rod w/Bearing
- Flat Top Piston (~10:1 Compression)
- 24mm 3-Circuit Carburetor (Will need to be jetted to local climate)
- 35lb HD Valvesprings
- Cut-To-Length Chromoly Pushrods
- Uses all GX390 Performance Parts (Cams, Valvetrain, etc)
- Electric Starter NOT included (Block has all provisions to install one, Flywheel has starter ring.)
- No Charging Coil
Upgrade to 1.1:1 Shaft Rockers for $19.99
Add 11 Degree Adjustable Timing Bracket for $39.99
The builder kits are designed for those who are advanced or experienced engine builders. We can only provide minimal tech support.