SG250 Owner’s and Service Manual
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25
Front and Rear Brake Troubleshooting and Maintenance
Worn brake pads or
brake shoes
Longer stopping
distance, weaker
stopping
Replace brake pad
or brake shoe
Reduced front
braking force
Air intrusion into
brake line
Pulsations; longer
stopping distance
Measure disk
runout, replace disk
rotor
Power Transmission
The SG250 uses a manually-operated wet clutch and a chain drive system.
Chain Drive System
This system consists of the clutch, the countershaft sprocket, the rear sprocket, the rear wheel, and the
drive chain.
Chain Lubrication
The drive chain should be lubricated approximately every 500 miles or more often if riding in rainy or
dusty conditions. Use only a quality wax-based or petroleum-based motorcycle chain lubricant. Ride
the motorcycle for at least 15 minutes to warm the chain, and apply the lubricant immediately after
stopping. Warning! Take care not to spray lubricant onto the tire or the rear brake. Do not use the
motorcycle for the next 15 minutes to allow the lubricant to seep into the chain.
Chain Adjustment
This section of the Owner’s and Service Manual addresses adjusting the SG250 motorcycle’s chain and
aligning the rear wheel.
You don’t have to get the rear wheel off the ground to adjust the SG250’s chain.
Adjusting the chain on a motorcycle consists of two jobs: Adjusting chain tension and aligning the rear
wheel.
You can check this adjustment easily, and you should perform this check on a regular basis. A lubricated
chain will require adjustment every 500 to 1000 miles once the motorcycle is broken in.
Adjusting the chain involves loosening (but not removing) the rear axle, loosening the adjustor nuts and
locknuts, using a screwdriver between the chain and the rear sprocket to remove all kinks, aligning the
rear wheel, tightening the rear axle, and tightening the adjustor nuts and locknuts.