G260PUM BZ1 Engine Modification | Zenoah


Looking for an upgrade? The BZ1 adds reliability and better fuel economy to your stock engine. With two oil grooves cut into the piston, this mod helps prevent galling. This mod also includes an advanced exhaust port timing; an advanced intake timing; a flow-ported exhaust; increased compression, and additional piston clearance.

It comes with a Walbro WT-644 Carb but can be upgraded to the WT-257, WT-813A, or the WT-1048 for an additional cost.

4.5HP at 16 200 RPM (with a G260PUM)

Hardware Color

Drill & Tap for Water Pump

Add “Very Cool” Water Jacket

Upgrade to WT-813A Carb

Add BONZI Break-In Oil

Upgrade to WT-257 Carb

Aluminum Velocity Stack

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 BZ1 Engine Modification includes the Zenoah G260PUM & the Walbro WT644 Carburetor. Adds an approximate 5MPH increase over the stock Zenoah G260PUM.

Includes: Advanced exhaust timing, flow port exhaust, flow port intake, piston clearance mod & 2 oil groves cut into piston.


Contact us with any questions.

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