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Tune-Up Specifications for Honda C65 (M)

These are the tune-up specifications for the Honda C65/M. The source of this data is Chilton's Honda Singles Repair and Tune-up Guide, 2nd ed. This book covers models made between 1968 and 1975.

Ignition    
Standard spark plug C7HS NGK
Spark plug gap (in./mm) 0.024-0.028/0.6-0.7  
Breaker point gap (in./mm) 0.012-0.016/0.3-0.4  
     
Valve clearance    
Intake (in./mm) 0.002/0.05  
Exhaust (in./mm) 0.002/0.05  
     
Carburetor    
Pilot air screw (turns out) 1 1/4  
Float level (in./mm) 0.69/17.5  
Idle speed (rpm) 1000-1200  
     
Cranking compression (psi) 170  

1 = K3~ : 0.65/16.5
2 = Keihin : 0.78/19.5 - Mikuni : 0.95/24.0
3 = CT90 : 0.85/21.5 - K1 : 0.94/23.5

 

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