User Guide

15. REAR BRAKE/REAR FORK/REAR
WHEEL/REAR SHOCK ABSORBER
15-2
YUP 25 0
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
æ
2.0
Rear shock absorber spring free length
232.9
226
Rear brake disk thickness
3.5_ 3.8
3.0
Rear brake disk runout
æ
0.30
Rear brake master cylinder I.D.
12.700_ 12.743
12.755
Rear brake master cylinder piston O.D.
12.657_ 12.684
12.645
Rear brake caliper cylinder I.D.
25.400_ 25.45
25.45
Rear brake caliper piston O.D.
25.335_ 25.368
25.30
TORQUE VALUES SPECIAL TOOLS
Exhaust muffler lock bolt 32_ 38N-m Rear shock absorber remover
Rear axle nut 110_ 130N-m Shock absorber spring compressor
Rear shock absorber lower mount bolt 35_ 45N-m
Rear shock absorber upper mount bolt 35_ 45N-m
Rear damper lock nut 14.7_ 24.5N-m
(apply locking agent)
Rear brake caliper bolt 29_ 35N-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 • Unevenly worn brake caliper
Rear wheel noise
• Worn rear wheel axle bearings
• Worn rear fork bearings
• Deformed rear fork