Re: 1958 G80CS Valve timing
Posted: Mon Jan 23, 2017 11:03 pm
Richard, was the bike running when you got it? If it was did you change the piston during your rebuild? If so was distance from the gudgeon pin to the top of the piston Dome the same? Did it have the same valve cut aways? If it was not running when you got it can the previous owner confirm if it ever ran with the reprofiled cams?
Your answers to these questions may help identify the problems. Personally I think it's likely that the timing marks scribed on may have been used in a different way however have you tried to use the method outlined in th right hand side of the black boxed area in page 1 of Kens article. If the marks are of any use this will get you going.
If that does not work there is an article in the technical section which gives all the valve timings and tells you how to test for them. It's on the club website under articles, technical tips, singles, hw single cam information. It includes cam timing for the comp models and I think covers your year.
Your answers to these questions may help identify the problems. Personally I think it's likely that the timing marks scribed on may have been used in a different way however have you tried to use the method outlined in th right hand side of the black boxed area in page 1 of Kens article. If the marks are of any use this will get you going.
If that does not work there is an article in the technical section which gives all the valve timings and tells you how to test for them. It's on the club website under articles, technical tips, singles, hw single cam information. It includes cam timing for the comp models and I think covers your year.