performance 139qmb cam fit question

[seaquell]

I am about to buy a perf. cam for my big bore 80cc+ qmb139.
I see a lot of cams listed that fit 50 and 150 motors. they both have 34 teeth and the same bearings will any 150ccGY6 cam fit in a qmb139head. I understand the 150 lobes are probb. larger.
Thx.

[usmcdoc]

No they are identical in tooth number and gear size.....BUT the 150 cam is wider. It won't fit a 50 cc engine....

[seaquell]

Thank You --I will go with the scrappydog A9 50cc cam. I used their BBK and head kit and they both work good.

[usmcdoc]

The A9 cam works WELL...in all of our BBK scoots.... :riding: