Cylinder kit 67mm NIKASIL plated 187cc or 200cc 2V
2 Valve kit to fit the YX, HO & Zongshen engines
Compleate kit
1 x Cylinder 67mm
1 x Head and base gasket
1 x Piston kit with rings 13 pin 2V
Skirt 70mm Later YX engines have a 70mm opening so check what you have in case you have to bore them out.
See below engine size to stroke
53mm stroke = 187cc
57mm stroke = 200cc