Yamaha Jog / Horizontal Minarelli Top Performance Black Trophy 40mm "50cc" Cylinder Kit cooler If your exhaust slips into

If your exhaust slips into the exhaust port- not for you

These have been tossed in and abused in several Flat Reeds in Atlanta

Pretty basic port map but should give a solid boost to your Vespa

Now in black

Yamaha Jog / Horizontal Minarelli Top Performance Black Trophy 40mm "50cc" Cylinder Kit cooler If your exhaust slips intoTop Performance Black Trophy 40mm 50cc cylinder kit for Yamaha Jog and other scooters powered by the Horizontal Minarelli engine. High quality, cast iron replacement cylinder kit. Ideal alternative to replacement stock cylinders in order to both increase power output while remaining reliable. Teflon coated, 2 ring, piston with 10mm wrist pin. High compression, o ring head. Comes with cylinder, piston, rings, pin clips, gasket set, and high compression