QMB139 72cc cylinder/piston kit
Untitled document This kit serves as a replacement cylinder/piston kit to our Powerpack part number 840001.
This kit can be used by itself with the stock valve head, but I do recommend upping the weight of the stock 50cc variator rollers to an 8 gram (see part number 220016).
The picture is actually of a 150cc kit, but what is included is the same; Cylinder, Piston, Pin, Gaskets & Rings.