Valve Clearance: Adjustments

NOTE:
- Valves should be adjusted only when the cylinder head temperature is less than 100°F (38°C).
- After adjusting, retorque the crankshaft pulley bolt.

1. Remove the cylinder head cover.
2. Remove the upper cover.





3. Set the No. 1 piston at TDC. The "UP" mark on the cam-shaft pulley should be at top, and the TDC marks should align with the cylinder head surface.
4. Adjust valves on No. 1 cylinder.

Intake: 0.18 - 0.22 mm (0.007 - 0.009 inch)
Exhaust: 0.23 - 0.27 mm (0.009 - 0.011 inch)





5. Loosen the locknut, and turn the adjustment screw until the feeler gauge slides back and forth with a slight amount of drag.





6. Tighten the locknut, and check the clearance again. Repeat the adjustment if necessary.





7. Rotate the crankshaft 180° counterclockwise (camshaft pulley turns 90°). The "UP" mark should be on the exhaust side. Adjust valves on No. 3 cylinder.





8. Rotate the crankshaft 180° counterclockwise to bring No. 4 piston to TDC. Both TDC grooves are once again visible. Adjust valves on No. 4 cylinder.





9. Rotate the crankshaft 180° counterclockwise to bring No. 2 piston to TDC. The "UP" mark should be on the intake side. Adjust valves on No. 2 cylinder.