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15. REAR BRAKE/REAR FORK/REAR
WHEEL/REAR SHOCK ABSORBER Downtown 300i ABS
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) Service Limit (mm)
Rear wheel rim runout
Rear brake disk thickness 5.0
Rear brake disk runout
Rear brake master cylinder I.D. 25.33 ~ 25.36
Rear brake master cylinder piston O.D. 25.40 ~ 25.45
TORQUE VALUES
Exhaust muffler lock bolt 35 N-m (4 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 40 N-m (4 kgf-m)
Rear shock absorber upper mount bolt 40 N-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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