Yamaha YFM250 Owner's Manual page 128

Type:
SAE 5W-30, 10W-30, 10W-40, 15W-40, 20W-40 or 20W-
50
0 10 30
SAE 5W-30
SAE 10W-30
–20 –10 0
Recommended engine oil grade:
API service SG type or higher, JASO standard MA
Engine oil quantity:
Without oil filter element replacement:
1.25 L (1.32 US qt, 1.10 Imp.qt)
10
With oil filter element replacement:
1.35 L (1.43 US qt, 1.19 Imp.qt)
Air filter:
Air filter element:
Wet element
Fuel:
Recommended fuel:
YFM250RD Unleaded gasoline only
YFM25RD Regular unleaded gasoline only
50 70 90 110
SAE 10W-40
SAE 15W-40
SAE 20W-40
SAE 20W-50
10 20 30 40
Fuel tank capacity:
9.0 L (2.38 US gal, 1.98 Imp.gal)
Fuel reserve amount:
1.0 L (0.26 US gal, 0.22 Imp.gal)
Carburetor:
130 ˚F
Type × quantity:
BSR29 x 1
Spark plug (s):
Manufacturer/model:
NGK/DR7EA
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)
Clutch:
Clutch type:
Wet, multiple-disc
Operation:
50 ˚C
Left hand operation
Transmission:
Primary reduction system:
Spur gear
Primary reduction ratio:
76/22 (3.455)
Secondary reduction system:
Chain drive
Secondary reduction ratio:
38/14 (2.714)
Transmission type:
Constant mesh 5-speed
Operation:
Left foot operation
10-2