Yamaha yz250 2015 User Manual

2-6
MAINTENANCE SPECIFICATIONS
CHASSIS
Item Standard Limit
Steering system:
Steering bearing type Taper roller bearing ----
Front suspension:
Front fork travel 300.0 mm (11.81 in) ----
Fork spring free length 454.0 mm (17.87 in) 449.0 mm
(17.68 in)
Spring rate, STD K=4.30 N/mm (0.44 kg/mm, 24.55 lb/in) ----
Optional spring Yes ----
Oil capacity 515.0 cm
3
(18.13 Imp oz, 17.41 US oz) ----
Oil grade Suspension oil "S1" ----
Inner tube outer diameter 48 mm (1.9 in) ----
Front fork top end 0 mm (0 in) ----
Rear suspension:
Shock absorber travel 131.5 mm (5.18 in) ----
Spring free length 260.0 mm (10.24 in) ----
Fitting length 248.0 mm (9.76 in) ----
Preload length
<Min.–Max.> 1.5–18 mm (0.06–0.71 in) ----
Spring rate, STD K=48.00 N/mm (4.89 kg/mm, 274.08 lb/in) ----
Optional spring Yes ----
Enclosed gas pressure 1,000 kPa (10.0 kg/cm
2
, 142.2 psi) ----
Swingarm:
Swingarm free play limit
End ---- 1.0 mm (0.04
in)
Side clearance ---- 0.2–0.9 mm
(0.01–0.04 in)
Wheel:
Front wheel type Spoke wheel ----
Rear wheel type Spoke wheel ----
Front rim size/material 21 × 1.60/Aluminum ----
Rear rim size/material 19 × 2.15/Aluminum ----
Rim runout limit:
Radial ---- 2.0 mm (0.08
in)
Lateral ---- 2.0 mm (0.08
in)
Drive chain:
Type/manufacturer DID520DMA2 SDH/DAIDO ----
Number of links 113 links + joint ----
Chain slack 48.0–58.0 mm (1.89–2.28 in) ----
Chain length (15 links) ---- 242.9 mm
(9.56 in)

Yamaha yz250 2015 Specifications

General

Displacement	249cc
Bore x Stroke	66.4mm x 72.0mm
Compression Ratio	8.9~10.6:1
Ignition	CDI
Transmission	5-speed; multiplate wet clutch
Final Drive	Chain
Front Tire	80/100-21
Rear Tire	110/90-19
Wheelbase	58.3 in
Seat Height	39.1 in
Ground Clearance	14.2 in
Fuel Capacity	2.1 gal
Wet Weight	227 lbs
Engine Type	2-stroke
Fuel System	Keihin PWK38S
Front Suspension	KYB Speed-Sensitive System inverted fork; fully adjustable
Rear Suspension	12.4-in travel
Front Brake	Single disc, 250mm
Rear Brake	Hydraulic single disc brake, 245mm
Width	32.5 inches