Valve stem sizes

[ChrisTheChippy]

I am just in the process of overhauling my cylinder heads. ( ajs 650 csr 1961) . I can't seem to find any info regarding size of valve stems or internal dimensions of valve guides . All I really need to know is the size of the valve stem when new . I should then be able to judge if they are worn or the guide is worn . I think the guides may be borderline not a massive amount of play but there was a lot of carbon up the stem of one of the exhaust valves so that ones suspect.

[Duncan]

Take a look at page 80 of this file in the club archive: https://www.jampot.com/archives//AJS%20 ... .NEILL.pdf

[ChrisTheChippy]

Thanks Duncan. I have that book. The info is for the 1955 - 1956 models .
Can I take it that valve stem and guide sizes remained the same? Mines a 61 csr .

[1608]

Chris, just measure the un-worn part of the valve stem, if the valve doesn't look scored its more likely the guide is worn and not the valve. Guide is softer than the valve.

[Duncan]

Thanks Duncan. I have that book. The info is for the 1955 - 1956 models .
Can I take it that valve stem and guide sizes remained the same? Mines a 61 csr .

The cover said 1955 - 1965?

[g80csp11]

1960 - 1966 650cc
Exhaust V206 026043 0.3095" stem diameter
Inlet V205 026041 0.2795" stem diameter

[ChrisTheChippy]

Thank you all for your replies. Just the information I was looking for.
John haven't seen you for a while catch-up soon. Cheers Chris