Originally posted by Taylor-Racing
Nah, doesn't sound like an air leak to me.
When you say "struggle to get to top revs" that indicates it's too rich.
It may be too rich on top and on the bottom needle - impossible to tell from here. 
I'd take it to a friend or your LHS to get it sorted. It doesn't sound like there is anything fundamentally wrong with it.
Thanks for your advise do you have one of these and what are your carb settings?
