GX390 16

Starter Nut for Metric Animal and Honda GX390  16 x 1.5mm thread pitch. 1.375" overall length. Uses 3/4" socket wrench.

Extended Starter Nut  for Metric Animal/Honda GX340/39016 X 1.5mm Thread Pitch and 2.625" overall length. Uses 3/4" socket wrench.

GX390 +.200 Stroker Crankshaft. 2.720"(69mm) stroke with standard crank pin diameter. Machined in house from hardened 4340 Chromoly to the exact standard you have come to expect from ARC. Dual plane balanced to eliminate the need for the OEM counter...