Yamaha YFM660R Owner's Manual page 413

MODEL
Gear ratio:
1st
2nd
3rd
4th
5th
Reverse
Chassis:
Frame type
Caster angle
Trail
Tire:
Type
Size: Front
Size: Rear
Brake:
Front brake type
Operation
Rear brake type
Operation
Suspension:
Front
Rear
Shock absorber:
Front
Rear
31/12 (2.583)
30/18 (1.667)
27/21 (1.286)
22/21 (1.048)
19/21 (0.905)
23/16 × 28/23 (1.750)
Steel tube
°
8
47 mm
Tubeless
AT21 × 7 - 10
AT20 × 10 - 9
Dual disc brake
Right hand operation
Single disc brake
Right foot operation
Double wishbone
Swingarm (link suspension)
Coil spring/oil damper
Coil spring/gas-oil damper
10-4
YFM660R