Stuffed 28mm stroke crankshaft for marine engines. Full-circle crankshaft with stuffing reduces case volume, increasing primary compression and increasing power.
Also fits Zenoah G231PUM and G260PUM with minor crankcase modification - you will need to slightly carve out the cases under the crankshaft flyweights to allow for proper clearance. Installing this crankshaft has a significant performance gain for the Zenoah engines.