Engine Kit, GX390 Stroker, 420 cc (+.200), Cast Crank

420cc Engine kit. for GX390s

Choice of

• Aftermarket Cast Crank with .200 More Stroke, producing 420cc
• ARC Billet Rod
• OEM Honda Piston machined to fit kit
• OEM Honda Rings
• Wristpin & Clips

Puts piston at TDC, Note: This is not a bolt in kit, but for experienced engine builders.

Available unbalanced or Fully Balanced.

Also available for GX340, please email.

Engine Kit, GX390 Stroker, 414 cc (+.160), Honda Crank

414cc Engine kit. for GX390s

• Genuine Honda Crank welded and ground for +.160 more Stroke, producing 414cc
• ARC Billet Rod
• OEM Honda Piston machined to fit kit
• OEM Honda Rings
• Wristpin & Clips

Puts piston at TDC, Note: This is not a bolt in kit, but for experienced engine builders.

Available unbalanced or Fully Balanced.

Also available for GX340, please email.

Engine Kit, GX390 Stroker, 420cc (+.200), Billet Crank & Forged Piston

420cc Engine kit. for GX390s. The ultimate kit for high Revving GX390s

• Billet Steel Crank producing 420cc
• ARC Billet Rod
• Forged Diamond Flat-Top
• Piston Rings
• Tool Steel Wristpin & Clips

Puts piston at TDC, Note: This is not a bolt in kit, but for experienced engine builders.

Available unbalanced or Fully Balanced (not needed for most appications) .