Yamaha WR250R 2020 Owner's Manual page 96

Specifications
Final drive:
1
Chain
Secondary reduction ratio:
3.308 (43/13)
2
Transmission type:
Constant mesh 6-speed
Gear ratio:
3
1st:
2.643 (37/14)
2nd:
4
1.813 (29/16)
3rd:
1.318 (29/22)
5
4th:
1.040 (26/25)
6
5th:
0.889 (24/27)
6th:
7
0.786 (22/28)
Chassis:
Frame type:
8
Semi double cradle
Caster angle:
26.7 
9
Trail:
111 mm (4.4 in)
Front tire:
10
Type:
With tube
11
Size:
80/100-21M/C 51P
Manufacturer/model:
12
BRIDGESTONE/TW-301F
Rear tire:
Type:
With tube
Size:
120/80-18M/C 62P
Manufacturer/model:
BRIDGESTONE/TW-302F
Loading:
Maximum load:
184 kg (406 lb) (CAL)
185 kg (408 lb) (U49)
* (Total weight of rider, passenger, cargo
and accessories)
Tire air pressure (measured on cold
tires):
Up to 90 kg (198 lb) load:
Front:
2
125 kPa (1.25 kgf/cm , 18 psi)
Rear:
2
175 kPa (1.75 kgf/cm , 25 psi)
90 kg (198 lb) load - maximum load:
Front:
2
150 kPa (1.50 kgf/cm , 22 psi)
Rear:
2
200 kPa (2.00 kgf/cm , 29 psi)
Front wheel:
Wheel type:
Spoke wheel
Rim size:
21 x 1.60
Rear wheel:
Wheel type:
Spoke wheel
9-2
Rim size:
18 x 2.15
Front brake:
Type:
Hydraulic single disc brake
Specified brake fluid:
DOT 4
Rear brake:
Type:
Hydraulic single disc brake
Specified brake fluid:
DOT 4
Front suspension:
Type:
Telescopic fork
Spring:
Coil spring
Shock absorber:
Hydraulic damper
Wheel travel:
270 mm (10.6 in)
Rear suspension:
Type:
Swingarm (link suspension)
Spring:
Coil spring
Shock absorber:
Gas-hydraulic damper
Wheel travel:
270 mm (10.6 in)
Electrical system:
System voltage:
12 V