414cc Stroker Crank, OEM Honda Crankshaft welded and ground producing +.160 more stroke for a total of 2.68" (68mm), Puts piston at -.010 to TDC on Honda Blocks (Chinese OHVs will Vary),Use with stock length rod and OEM Piston (piston must be cut .040)Crank requires balancing
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 balance system. Design for use with the ARC 6272 rod and the 27-3464 (88mm) piston. 1" PTO shaft. Some internal engine clearancing may be required. If using piston bigger than 90mm, re-balancing may be required.