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16. REAR BRAKE/REAR FORK/REAR
DOWNTOWN 125i
WHEEL/REAR SHOCK ABSORBER
SERVICE INFORMATION
GENERAL INSTRUCTIONS
· When performing the services stated in this section, the engine and exhaust muffler must be cold to avoid
scalding.
· During servicing, keep oil or grease off the brake pads and brake disk.
SPECIFICATIONS
Item Standard (mm)
Rear brake disk thickness 4.9~5.1
Rear brake caliper piston O.D. 25.33~25.36
Rear brake caliper cylinder I.D. 25.4~25.45
Rear brake master cylinder I.D. 12.7~12.74
Rear brake master cylinder piston O.D. 12.65~12.68
TORQUE VALUES
Exhaust muffler lock bolt 35 N-m/3.5 kgf-m
Exhaust muffler pipe nut 20 N-m/2 kgf-m
Rear axle nut 120 N-m/12 kgf-m
Rear shock absorber lower mount bolt 40N-m/4 kgf-m
Rear shock absorber upper mount bolt 40N-m/4 kgf-m
Rear brake caliper holder bolt 27 N-m/2.7 kgf-m
TROUBLESHOOTING
Rear wheel wobbling Poor brake performance
· Bent rim · Air in brake system
· Faulty tire · Deteriorated brake fluid
· Axle not tightened properly · Contaminated brake pad surface
· Worn brake pads
Soft rear shock absorber · Clogged brake fluid line
· Weak shock absorber spring · Deformed brake disk
· Damper oil leaks · Unequal worn brake caliper
Rear wheel noise
· Worn rear wheel axle bearings
· Worn rear fork bearings
· Deformed rear fork
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