The Counter-rotated Bonzi BZx4 Ultra Engine Modification comes standard with a Zenoah G260PUM engine. You can upgrade to the G300PUM for an additional cost. It adds an approximate 10-15 MPH increase over stock Zenoah engines. Proven performance and reliability (actual performance based on your boat, prop, pipe, weight, etc). Includes: Bonzi BZX4 RACE ENGINE: raised exhaust timing and enlarged exhaust port, a reverse starter, reverse mounts, reverse clutch, and reverse integrated collet. port matched intake manifold, machined lightened and top relieved piston, two oil grooves for lubrication at high RPM, increased intake volume in jug, modified flow direction, jug base machined for increased compression, zero drag seals, Walbro WT-257 big bore carb, Bonzi “Very Cool” Water Jacket, Stainless Hardware Kit and Bonzi carb velocity stack, NGK CMR7H spark plug, round collet insert and your choice of colors. 6.0HP@16,800RPM All Bonzi modified engines are custom-built and therefore will take up to one (1) week from time of order to time of shipment. Contact us with any questions.
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