The BZx2 Engine Modification includes the Zenoah G260PUM & the Walbro WT644 Carburetor. Adds an approximate 8-10MPH increase over the stock Zenoah G260PUM engine. Add an optional WT257/WT1027 carb for additional power & performance. Includes: Advanced exhaust timing, flow port exhaust, advanced intake timing, flow port intake, piston clearance mod, 2 oil groves cut into piston, port matched case & jug. 5.2HP@16,500RPM Contact us with any questions.
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