Operation Manual

Technical Information
191
Specifications
Engine Specifications
displacement 85.8 cm
3
(5.23 cu-in)
bore & stroke 47 × 49.5 mm (1.85 × 1.95 in)
compression
ratio
9.2 : 1
spark plug
(standard)
CR7HSA (NGK) or
U22FSR-U (DENSO)
spark plug
(cold climate)
CR6HSA (NGK) or
U20FSR-U (DENSO)
spark plug
(high speed
riding)
CR8HSA (NGK) or
U24FSR-U (DENSO)
spark plug gap 0.60 – 0.70 mm (0.024 – 0.028 in)
valve clearance
(cold)
intake: 0.05 mm (0.002 in)
exhaust: 0.05 mm (0.002 in)
idle speed 1,600 ± 100 min
–1
(rpm)
Power Transmission
primary reduction 4.058
final reduction 3.846
gear ratio
1st 2.833
2nd 1.937
3rd 1.300
4th 0.958
final drive
chain
DID 428V – 98LE or
RK428 HOZ1 – 98LE
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