4-5 2. Tire inspection
Always check the tires before operating the motorcycle.
If a tire tread shows crosswise lines (minimum tread
depth), if the tire has a nail or glass fragments in it, or
if the side wall is cracked, contact a Yamaha dealer or
other qualified mechanic and have the tire replaced.
1. Tread depth 2. Side wall 3. wear indicator
After extensive tests, the tires listed below have been
approved by Yamaha for this model. The front and rear
tires should always be by the same manufacturer and
of the same design. No guarantee concerning handling
characteristics can be given if a tire combination other
than one approved by Yamaha is used on this
motorcycle.
Front
Rear
Size Manufacturer
Type
Minimum tire tread depth
(from and rear)0,8 mm (0,032 in) 2.75-18 PIRELLI
42P MT 39
90/90-18 PIRELLI
57P MT 15
WARNING:
4-5 2. Tire inspection
Always check the tires before operating the motorcycle.
If a tire tread shows crosswise lines (minimum tread
depth), if the tire has a nail or glass fragments in it, or
if the side wall is cracked, contact a Yamaha dealer or
other qualified mechanic and have the tire replaced.
1. Tread depth 2. Side wall 3. wear indicator
After extensive tests, the tires listed below have been
approved by Yamaha for this model. The front and rear
tires should always be by the same manufacturer and
of the same design. No guarantee concerning handling
characteristics can be given if a tire combination other
than one approved by Yamaha is used on this
motorcycle.
Front
Rear
Size Manufacturer
Type
Minimum tire tread depth
(from and rear)0,8 mm (0,032 in) 2.75-18 PIRELLI
42P MT 39
90/90-18 PIRELLI
57P MT 15
WARNING:
8-3
MODEL YBR 125K
Transmission:
Primary reduction system Spur gear
Primary reduction rate 68 / 20
Secondary reduction system Chain drive
Secondary reduction rate 45 / 14
Transmission type Constant mesh 5-speed
Operation Left foot operation
Gear ratio 1st 37 / 14
2nd 32 / 18
3rd 25 / 19
4th 23 / 22
5th 21 / 24
Chassis:
Frame type Diamond
Caster angle 26∫ 20î
Trail 103 mm ( 4,0 in)
Tire:
Type With tube
Size:
Front 2.75-18 42P MT39
Rear 90/90-18 57P MT15
8-3
MODEL YBR 125K
Transmission:
Primary reduction system Spur gear
Primary reduction rate 68 / 20
Secondary reduction system Chain drive
Secondary reduction rate 45 / 14
Transmission type Constant mesh 5-speed
Operation Left foot operation
Gear ratio 1st 37 / 14
2nd 32 / 18
3rd 25 / 19
4th 23 / 22
5th 21 / 24
Chassis:
Frame type Diamond
Caster angle 26∫ 20î
Trail 103 mm ( 4,0 in)
Tire:
Type With tube
Size:
Front 2.75-18 42P MT39
Rear 90/90-18 57P MT15
