Yamaha RAPTOR YFM660RR Owner's Manual page 404

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
Wet element
Unleaded gasoline only
For Europe: Regular unleaded gasoline only with a
research octane number of 91 or higher
12 L
2.6 L
BSR33 × 1
MIKUNI
DPR8EA-9/NGK
0.8–0.9 mm
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