motor/speed help

[kalleb01]

Hey I have a motorised push bike this is my 3rd one now it has apparently had a racing cylinder and a larger cylinder bore to fit new larger cylinder the problem is it keeps cutting out? And its not as fast as my previous bikes? Please help

 

[crassius]

never heard of such a thing - what kind of engine?

 

[Deleted member 12676]

details please
at what rpm range does it "cut out"?

 

[HeadSmess]

sounds more like you fell for the advertising hype