Drive Chain - Baja motorsports Phoenix 250 Owner's Manual

Drive Chain

There is a riveted master link on the chain which connects the
countershaft to the rear wheel sprockets. To keep out moisture
and dirt the O-ring chain uses rubber rings between the side
plates of the pin and roller links to seal in the lubricating grease.
Proper lubrication and adjustment will help extend the life of
the chain. You should always perform the pre-ride inspection to
check the adjustment and lubrication before riding. If you are
riding in dusty or muddy conditions remember to maintain and
service the chain more often that usual.
Before any servicing to the chain occurs be sure the engine is off
and in neutral.
You do not need to remove the chain to perform service in the
Maintenance Schedule.
Inspection
1) Check the slack of the lower drive chain right between the two
sprockets.
Slack (allowing vertical movement by hand): 9/16in(15-30mm)
2) The slack should remain consistent along the entire chain,
if not, check to make sure their are no kinks or binds. You can
sometimes eliminate kinks or binds by lubricating the chain.
3) Inspect chain for:
Chain
-Damaged rollers
-kinks or binds
-dry or rusty links
-improper adjustment
-excessive wear
-damaged or missing o-rings