bike studders
 

I have a 02 f4i. Replaced the CCT with the manual one. Chain is really bad, since previous owner. (Got new one coming ) But I think the bike has a slight studder when I have a constant throttle in the low gears from 1-3. I thought it was just me but my brother also noticed without me pointing it out, but he said might be because he has not ridden in awhile. I have been riding it hard up mountains, staying in low gear.


Is there anything I should look for?