The problem is probably the Shift forks most likely like Mike said (DOOD) but one thing to take note on is the fact that the Takagawa Shift drums are made of aluminum, which are lighter then the other shift drums on the market but it isn't as durable and with time the shift fork guide grooves in the Takagawa Shift drum will wear an indention/bump into the grooves and cause the shifting to not be as smooth and hang up at times once this happens.
I've seen those aluminum drums F%&@ up after a crash on the shifter side of the bike. BBR sent me one of those Tak drums a long time ago when I was first doing the 4th gear drum thing. I looked at it, then called them and sent it back to them as I wanted the nice steel (I think the BBR drums are the OEM drums from Thailand) stock drum-- more durable. I had my motor all apart, and I had to wait a week and a half to get one-- I was kinda pissed. --- L*64
yea i had the chp qiuck shift but i wud slip out of the shift star with the washer... wierd so i sold it... and its gradually gettin worse but over time and i dont wanna split my cases to put a new one in... thats alot of work for a lil problem.