Engine, 460cc, Chinese OHV, 25hp, Assembled with Billet Rod

  • Sale
  • Regular price $619.00


These Built engines are custom made to our specifications and are the only 458cc Honda GX390 "big bore clones" available for purchase in the United States.

Finish Machined & Assembled in Las Vegas, NV...All Engines are test ran to ensure you dont receive a defective engine!

  • 92mm Bore x 69mm Stroke = 458cc
  • 246 Duration .260" Lift
  • 4.45" Billet Connecting Rod w/Bearing Installed & Clearanced
  • Chrome moly Push rods Installed
  • 35lb Heavy Duty Valve Springs Included
  • 10.5:1 Compression (7cc Dished Piston)
  • 0.020" MLS (Multi-Layer Steel) Head gasket Included - The strongest head gasket on the market!
  • Tuned Carb Included
  • 1" Shaft with 1/4" Keyway
  • No Rev Limiter or Governor
  • Heavy Duty 10-Bolt Engine Block (Modified Extra-Thick & Reinforced Casting) - The strongest clone engine block on the market!
  • Inulator with Pulse Fitting Installed (No need to drill and tap your isolator to get engine vaccuum to your fuel pump!)
  • 91 Octane Recommended


*Engine does not come with an electric-starter. Due to an elevated compression ratio,use of an electric start is not recommended.