Inspect the gear selector forks. All bent forks must be changed as they may lead to difficulties in gear changing or may suddenly disengage the gears under load.
Use a feeler gauge to check the clearance of each fork in its gear groove.
If its exceeds the clearance limit, establish whether it is necessary to change the gear or the fork by referring to the limits for each part.
Groove width of a new gear: L=4.070-4.185 mm
New fork pad thickness: S=3.90-4.00 mm
Clearance between new fork and gear: 0.070-0.285 mm
[The original article is posted on the website: Motoinstruction.ru]