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Technical Information 133
Specifications
Engine Specifications
Valve clearance
(cold)
Intake:
0.002 ± 0.001 in
(0.05 ± 0.02 mm)
Exhaust:
0.002 ± 0.001 in
(0.05 ± 0.02 mm)
Spark plug
(standard)
CR6HSA (NGK) or
U20FSR-U (DENSO)
Spark plug
(cold climate;
below 5°C, 41°F)
CR5HSA (NGK) or
U16FSR-U (DENSO)
Spark plug
(extended high
speed riding)
CR7HSA (NGK) or
U22FSR-U (DENSO)
Spark plug gap 0.02
–
0.03 in
(0.6
–
0.7 mm)
Idle speed 1,700±100 rpm
Power Transmission
Primary reduction 4.058
Gear ratio, 1st 3.272
2nd 1.666
3rd 1.190
Final reduction 2.642
Final drive chain
20CRF50F31GJGA20.book133ページ２０１９年２月１３日 水曜日 午前１１時２６分
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