SL/TL125 gear selection problems

[JC]

Bro has gear selection problems on his little Honda engines (SL & TL125s) - changes up OK but difficulty shifting down, especially selecting 3rd gear.

 Any Honda officiandos know if this is a common problem on these engines and what the fix is?
cheers

[matcho mick]

those boxes are usually pretty bulletproof,if the 6mm bolt retaining the "star" quadrant thingy on the end of the shift drum is loose that will cause weird shifts & would do as you describe,it's a pretty common scenario??,