SG250 Owner’s and Service Manual
www.CSCMotorcycles.com
27
After moving the rear wheel, put a screwdriver between the
chain and the rear wheel sprocket (as shown below) and
sharply rotate the rear wheel. This will remove any kinks in
the chain. Note that this photo shows the TT250
motorcycle, but the procedure is the same for either the
TT250 or the SG250 motorcycle.
Check the alignment of the rear wheel by comparing the
scribe marks on the rear axle adjustors with the scribe marks
on the swingarm. This photo shows the right side of the
motorcycle and the scribe lines.
This photo shows the left side of the motorcycle and the
scribe lines.
You do not need to remove the rear axle to adjust the chain. Just loosen it and use the adjustor nuts to
move the wheel to its required location.
When the rear wheel is aligned and the chain slack is correct, tighten the rear axle to 35 ft-lb. Tighten
the rear axle adjustors’ positioning nuts, and then tighten the rear axle adjustors’ locknuts (the outer
nuts) to lock the adjustors in place.
Lube the chain every time it is adjusted. You can use either a wax-based or an oil-based chain lube; CSC
stocks both types. You can call us at 909 445 0900 if you need chain lube.
Sprocket and Chain Inspection
The SG250 has a 428 chain, a 17-tooth front sprocket, and a 50-tooth rear sprocket. If you keep your
chain properly adjusted and lubed, the chain and sprockets will last much longer than they would if you
don’t maintain these items, but they still won’t last forever. You can expect the chain and sprockets to
wear more quickly if you ride in dusty environments or off road, or if you don’t lube the chain regularly.
Chains and sprockets should be replaced as a set. Do not replace one sprocket without replacing the
other or rapid wear will result.
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