Valve Arrangement
- Left Side - All Intake and Jet.
- Right Side - All Exhaust.
- Ensure timing marks on camshaft sprocket and chain are aligned. With head assembly installed, adjust valves in 1-3-4-2 cylinder sequence, according to following procedure.
- At compression stroke TDC, for cylinder being adjusted, loosen rocker arm nuts; then, turning adjusting screw, adjust valve clearance to specifications.
- Complete engine assembly and temporarily install rocker cover. Warm engine until coolant temperature is 170 to 180°F. With piston at TDC on compression stroke, back intake valve adjusting screw off 2 or more turns.
- Adjust jet valve clearance, intake valve clearance, and finally exhaust valve clearance. Assure that all adjusting screw lock nuts are tightened securely.
VALVE CLEARANCE
| Application | Cold: In. (mm) | Hot: In. (mm) |
|---|---|---|
| Intake | .003 (.07) | .006 (.15) |
| Exhaust | .007 (.17) | .010 (.25) |
| Jet Valve | .003 (.07) | .006 (.15) |
NOTE:
Jet valve spring is comparatively weak and must not be forced in when making adjustment. Final valve clearance should be adjusted after cylinder head bolts have been tightened to final torque.