Yamaha 2002 YB50, Service Manual

Page: 22 / 161

SPEC
MAINTENANCE SPECIFICATIONS
2-5
CHASSIS
Model YN50R
Steering system:
Steering bearing type Ball bearing
Front suspension:
Travel of front shock absorber 70 mm
Free length of shock absorber
spring 226 mm
<Limit>
Spring/stroke ratio
(K
1
) 1.12 Kgf/mm
(K
2
) 1.78 Kgf/mm
Oil capacity 45 cm
3
±1
Oil grade 10 W shock absorber oil or equivalent
Rear suspension:
Shock absorber travel 60 mm
Length of spring coupling 221 mm
Spring/stroke ratio (K
1
) 3.75 Kgf/mm
(K
2
) 7,10 Kgf/mm
Wheels:
Type of front wheel Alloy rim
Type of rear wheel Alloy rim
Size/material of front wheel 12 x 3.5 aluminium
Size/material of rear wheel 12 x 3.5 aluminium
Rim run-out limit
Vertical 1.0 mm
Lateral 1.0 mm
Front disc brake
Type Single
External diameter and disc
thickness 190.0 x 3.5 mm
Thickness of pads 4 mm
<Limit> <0.8 mm
Internal diameter of master cylinder 11 mm
Internal diameter of calliper 30.16 mm
Brake fluid type DOT 4
Drum brake:
Type Shoes
Internal diameter of drum 110 mm
<Limit> 110.5 mm
Lining thickness 4.0 mm
<Limit> 2.0 mm
Brake levers
Free play of brake lever
(right)/position 2 ~ 5 mm /at the end of the lever
Free play of brake lever
(left)/position 5 ~ 10 mm /at the end of the lever