Yamaha RAPTOR YFM660RP Owner's Manual page 167

MODEL
Radiator capacity (including all routes):
Air filter:
Fuel:
Type
Tank capacity
Reserve amount
Carburetor:
Type × quantity
Manufacturer
Spark plug:
Type/manufacturer
Gap
Clutch:
Type
Operation
Transmission:
Primary Reduction System
Primary Reduction Ratio
Secondary Reduction System
Secondary Reduction Ratio
Transmission type
Operation
1.3 L (1.14 lmp qt, 1.37 US qt)
Wet type element
UNLEADED GASOLINE ONLY
12 L (2.64 Imp gal, 3.17 US gal)
2.6 L (0.57 Imp gal, 0.69 US gal)
BSR33 × 2
MIKUNI
DPR8EA-9/NGK
0.8 ~ 0.9 mm (0.03 ~ 0.04 in)
Wet, multiple-disc
Left hand operation
Spur gear
71/34 (2.088)
Chain drive
40/13 (3.076)
Constant mesh, 5-speed forward, 1-speed reverse
Left foot operation
10-3
YFM660R