66cc,48cc bottoms

[flyinbrian]

was wondering if anyone knew if there is a difference between a 66cc engine bottom and a 48cc bottom. bought a used bike while back withh 66cc engine before had a 48 cc engine never any problem with bottom always with head and piston camn use bottom of my 48cc for my 66cc.
thanks all keep biking
Brian

 

[MotorBicycleRacing]

A 48cc bottom will not accept a 66cc cylinder without some machining.

The stud centers are wider on a 66 cc. Try laying a 50 cc head gasket over a 66 cc.