Is it the bike or the rider?

[Trek420]

I take it to the mechanics at Performance Bike - where I purchased it.

Ah. With all due respect to Performance, I'm sure there are wrenches at there who are good. It's just that I personally don't know of them, my encounters at Performance they have not seemed the best. I've met many who had bike purchase and maintenance issues from them.

I agree with others: find a another shop.