Yamaha yz250 2015, Owner'S Manual

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2-4
MAINTENANCE SPECIFICATIONS
Crankshaft:
Crank width "A" 59.95–60.00 mm (2.360–2.362 in) ----
Runout limit "C" 0.030 mm (0.0012 in) 0.050 mm
(0.0020 in)
Connecting rod big end side clearance "D" 0.250–0.750 mm (0.0098–0.0295 in) ----
Small end free play "F" 0.40–1.00 mm (0.02–0.04 in) 2.0 mm (0.08
in)
Clutch:
Friction plate thickness 2.90–3.10 mm (0.114–0.122 in) 2.80 mm
(0.110 in)
Quantity 8 ----
Clutch plate thickness 1.50–1.70 mm (0.059–0.067 in) ----
Quantity 7 ----
Warp limit ---- 0.20 mm
(0.008 in)
Clutch spring free length 50.00 mm (1.97 in) 48.00 mm
(1.89 in)
Quantity 6 ----
Clutch housing thrust clearance 0.17–0.23 mm (0.007–0.009 in) ----
Clutch housing radial clearance 0.03–0.05 mm (0.0012–0.0022 in) ----
Clutch release method Inner push, cam push ----
Transmission:
Main axle deflection limit ---- 0.01 mm
(0.0004 in)
Drive axle deflection limit ---- 0.01 mm
(0.0004 in)
Shifter:
Shifting type Cam drum and guide bar ----
Guide bar bending limit ---- 0.050 mm
(0.0020 in)
Kick starter type: Kick and ratchet type ----
Air filter oil grade (oiled filter): Foam-air-filter oil or equivalent oil ----
Item Standard Limit