Zenoah G260PUM BZx4 Engine Modification


Do you have a need for speed? The BZx4, aka the Classic BonzÍ Racing Mod, features upgrades to give you max speed and reliability. This mod includes a raised exhaust timing port; an enlarged exhaust port; a machined, lightened, and top relieved piston; two (2) oil grooves optimized for high RPM lubrication, along with increased compression.
It comes with a Walbro WT 257 Carb, BonzÍ Very Cool Water Jacket, ZeroDrag Seals, Stainless Steel Hardware Kit, Aluminum Velocity Stack, and NGK CMR7H Spark Plug.

5.5+ HP at 16 800 RPM. (with a G260PUM)

Hardware Color

Drill & Tap for Water Pump

Upgrade to WT-813A Carb

Add BONZI Break-In Oil

Upgrade to WT-1048 Carb

Mounting Package

Shipping Disclaimer: Due to the Covid-19 Pandemic, many shipments have been delayed. UPS, Fedex and USPS are currently unable to guarantee shipping dates/time frames until further notice.    Please contact us if you have any questions. (317)844-4695 We are open and processing orders as quickly as possible however, once in the hands of the shipping service we have no control over time and delivery.  Thank you for your patience and understanding. All the best, The Bonzi Sports Team  

This BZx4 Ultra Engine Modification includes the Zenoah G260PUM & the Walbro WT-257 Carburetor. Adds an approximate 10-15+MPH increase over the stock Zenoah G260PUM. 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, 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 stackand NGK CMR7H spark plug!


Contact us with any questions.

Additional information
Weight 5 lbs
Dimensions 8 × 8 × 8 in
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