Yamaha WR250F 2016 Owner's Service Manual page 58

Balancer
Balancer drive method
Clutch
Clutch type
Clutch release method
Clutch lever free play
Friction plate thickness
Wear limit
Plate quantity
Clutch plate thickness
Plate quantity
Warpage limit
Clutch spring free length
Limit
Spring quantity
Push rod bending limit
Transmission
Transmission type
Primary reduction system
Primary reduction ratio
Final drive
Secondary reduction ratio
Operation
Gear ratio
1st
2nd
3rd
4th
5th
6th
Main axle runout limit
Drive axle runout limit
Shifting mechanism
Shift mechanism type
Shift fork guide bar bending limit
Shift fork thickness
Decompression device
Device type
Air filter
Air filter element
Air filter oil grade
Fuel pump
Pump type
Fuel injector
Model/quantity
Resistance
ENGINE SPECIFICATIONS
Gear
Wet, multiple-disc
Inner push, cam push
7.0–12.0 mm (0.28–0.47 in)
2.90–3.10 mm (0.114–0.122 in)
2.85 mm (0.112 in)
9 pcs
1.10–1.30 mm (0.043–0.051 in)
8 pcs
0.10 mm (0.004 in)
47.80 mm (1.88 in)
46.80 mm (1.84 in)
5 pcs
0.10 mm (0.004 in)
Constant mesh 6-speed
Spur gear
3.353 (57/17)
Chain
3.846 (50/13)
Left foot operation
2.385 (31/13)
1.813 (29/16)
1.444 (26/18)
1.143 (24/21)
0.957 (22/23)
0.815 (22/27)
0.08 mm (0.0032 in)
0.08 mm (0.0032 in)
Shift drum and guide bar
0.050 mm (0.0020 in)
4.85 mm (0.1909 in)
Auto decomp
Wet element
Foam air-filter oil
Electrical
30NA-FZ31/1
12 
2-5