Honda 2006 RC51 Owner's Manual page 208

Capacities
passenger
capacity
maximum weight
capacity
Engine Specifications
displacement
bore & stroke
compression ratio
spark plug
(standard)
spark plug
(cold climate)
spark plug gap
valve clearance
(cold)
idle speed
Operator and one passenger
USA: 366 lbs (166 kg)
Canada: 375 lbs (170 kg)
rider, passenger, all cargo and accessories
60.9 cu-in (999 cm )
3.94 x 2.50 in (100.0 x 63.6 mm)
10.8 : 1
IFR9H11 (NGK) or
VK27PRZ11 (DENSO)
IFR8H11 (NGK) or
VK24PRZ11 (DENSO)
0.039 0.043 in (1.00 1.10 mm) −
0.006 in (0.16 mm)
intake
exhaust 0.012 in (0.31 mm)
1,300 ± 100 rpm
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Specifications
− no adjustment
Technical Information
201