1985-1986 Honda ATC250R Shop Manual, Page 27Get this manual
MAINTENANCE ADJUSTING TOOL ADJUSTER
P.DJUSTMENT
Loosen the two lock bolts using the tool provided in the tool kitTurn the adjuster to decrease or increase chain slack using the adjusting tool commercially availableINCREASE: Turn the adjuster clockwise DECREASE: Turn the adjuster counterclockwise Then tighten the lock boltsNOTE
If drive chain slack is excessive when the adjuster is moved to the limit of adjustment, the is worn and mtJst_be _J
LOCK BOLTS
Clean the drive chain with non-flammable or high flash poinl solvent that will not damage the O-rings, and wipe dryC,II.UTION
Do not washers or solpents as these will damage the O-rings_ _