Engine Kit, GX390 Stroker, 420 cc (+.200), Cast Crank, 88mm Cast Flat-Top

Choose your options:

Crankshaft Balancing(optional):

Do Not Balance

Electronic Balance Crankshaft (w/mallory)[Add $140.00]

Product Code: BILLETSTRKIT420C

Qty:

420cc Engine kit. for GX390s

Comes With:

Aftermarket Cast Crank with .200 More Stroke, producing 420cc
ARC Billet Rod
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.

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Engine Kit, GX390 Stroker, 420 cc (+.200), Cast Crank, 88mm Cast Flat-Top

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