dd355 - TS 4-Bolt Billet Reed Induction Crankcase for PUM / Marine Applications (backorder)
$335.00100% billet reed valve inducted G260PUM style (4-bolt style cylinder mount) crankcase from legendary 2-stroke engine builder Trevor Simpson. Kit includes billet case with bearings, seals, and gaskets, billet reed valve with 2 carbon fiber petals, mounting hardware, billet ignition coil mount with adjustable timing, and engraved block-off plate to cover the old cylinder intake (carburetor now mounts to reed valve on the crankcase). Interior case volume has been reduced compared to regular G260PUM cases to increase performance. Gives much more power from low RPM's all the way up to full speed. No cylinder modifications needed - just bolt on and go! For ultimate performance, however, additional gains can be realized with proper cylinder modifications (boost port, piston windowing, etc). Compatible with Zenoah 4-bolt style marine top ends - fits Zenoah G231PUM / G260PUM engines. Can also be used with Zenoah aircooled top-ends: G231PUH / G260PU / G260PU. Note: these cases feature custom crankcase extrusions to allow for easy mounting in a wide variety of boats and other marine applications. Carburetor position is substantially the same as a stock G260PUM.
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