59mm Aluminum Cylinder, with a cast iron sleeve (w/o head).
Give your Yamaha Zuma 125 some extra kick with this bolt on 158cc Big Bore kit.
Contains all gaskets needed.
Don't forget that unlike most scooters, the Yamaha Zuma 125 is a Fuel Injected Scooter, and in order to get this cylinder kit to perform properly, you should purchase a Fuel Injection Module.
We recommend the Two Brothers Juice Box.
( 59mm = 158CC )