5C camshaft valve timing diagram

No information around? We found the cam was at least 1 tooth out, and the timing mark on the cam wheel has been installed on the wrong side. Dial gauge setup on the tappet adjuster. Right foot change so I can't ride it. With the cam moved 1 tooth (12 degrees) at least it starts and idles now.
 
martymoose said:
Opening times for both seem to agree with the book, but both closing times are out
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I have never got the opening and closing times to make sense on these cams. I just find the middle point between the opening and closing figures and have max lift at that point, or the number of degrees advanced from standard that I want to use. A quick check to see if cam timing is out is the finger/thumb over plug hole before and after TDC compression, if it doesn't blow against your finger as you rotate forward to TDC, or create vacuum after , the cam timing is out. Cam timing marks will line up when the cam lobes are symmetrical, one facing forward, one rearwards, under the cam. Easy to see on a 360 twin because the overlap cylinder will have the lobes facing up opening/closing the valves.
 
Time it up with the mid point of your inlet cam full lift area at 103 degrees after TDC
Slot the cam gear holes if you need to. 1 or two degrees either way should not make too much difference but 12 would kill it. Try to be advanced rather than retarded if you have a choice.
Regards,
Julian
 
I've timed mine according to the green book for the 5/C Marty and had no issues at all. Not sure why you thought the figures were inaccurate? As mentioned on the blower, I run 5 deg advanced anyway.
 
MarnixSFC said:
Of course, but usually before I get the chance to look in my archive, 10 replies have already been posted..
I have checked various different factory sheets, they all show exactly the same figures for the 5/C as those in the green book.

Marnix
Click to expand...
That's probably where the authors of the Green Book found them then.
Paul
 
Head toque figures caused me a lot of grief with a pulled case stud before that error became well known.
 
Will (jugs) just rode it around the block, rides well, God knows how long the owner was trying to ride it with the cam out 1 tooth. Problem is it's been through a couple of different workshops as well, before the root cause of the problem was discovered....

Why the opening times for inlet and exhaust agree with the green book, and the closing times are longer, who knows. Happy result. Thanks guys.
 
I had an SF3 into the workshop once, needed 65 pilot jets to get it to idle and still was really lean with small throttle, was flat as shit until higher in the rev range then felt like it had a bit of a power band. That was when I noticed the lack if compress and vacuum over TDC. I think it was like that since he bought it a couple of years before, unless he wouldn't admit doing it himself. The bike went like a ripper after, proper size jets fitted, and the guy went and sold it straight away.
 
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