Valve clearance 400-4

[Tiny Tim]

Hi guys.
Started to check the valve clearances the 400 this afternoon and all was going well until I got to no3 intake valve. Whilst trying to adjust it I noticed that the feeler gauge will not pass under the rocker arm as it is tight up against the top of the spring. It loosens off when the engine is rotated to adjust the other valves.

I've followed the manual to the letter checking and re-checking and it still arrives back at the same place.

Cheers

Tim

[mike the bike]

It sounds like you're attempting to set the clearance while it's 'on the rock' .   you should adjust it when the cam lobe is opposite the spring.

[Tiny Tim]

Cheers once again Mike, I'll have another look tomorrow.