Honda CRF70F 2009 Owner's Manual page 140

Specifications
Engine Specifications
Valve clearance
(cold)
Spark plug
(standard)
Spark plug
(cold climate;
below 5°C, 41°F)
Spark plug
(extended high
speed riding)
Spark plug gap
Idle speed
132
Technical Information
0.002 in
Intake:
(0.05 mm)
0.002 in
Exhaust:
(0.05 mm)
CR6HSA (NGK) or
U20FSR-U (DENSO)
CR5HSA (NGK) or
U16FSR-U (DENSO)
CR7HSA (NGK) or
U22FSR-U (DENSO)
0.024 0.028 in −
(0.60 0.70 mm) −
1,700 ± 100 rpm
Power Transmission
Primary reduction
Gear ratio, 1st
2nd
3rd
Final reduction
Final drive
3.722
3.272
1.666
1.190
2.400
chain