Zenoah G260PUM BZx2 Engine Modification


Wanting an upgrade to your top end? The BZx2 has all the features of the BZ1 mod – an advanced exhaust port timing, an advanced intake timing, a flow-ported exhaust, increased compression, additional piston clearance; but also features a port matched case.
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.

5.0 HP 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

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  

The BZx2 Engine Modification includes the Zenoah G260PUM & the Walbro WT644 Carburetor. Adds an approximate 8-10MPH increase over the stock Zenoah G260PUM engine.

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.


Contact us with any questions.

Additional information
Weight 5 lbs
Dimensions 8 × 8 × 8 in
Reviews (0)


There are no reviews yet.

Be the first to review “Zenoah G260PUM BZx2 Engine Modification”