head or cam? - Honda RC51 Forum : RC51 Motorcycle Forums
 
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post #1 of 5 (permalink) Old 02-17-2014, 07:55 AM Thread Starter
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Unhappy head or cam?

Hi guys. Someone buggered around with the one head of my sp1. The agents say that I need to replace the head and cams, even though there is nothing wrong with the cams. Only the head. They say that you can't use different cams on a head, that they are a set. Is this true? Or are they trying to take me for a ride?...
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post #2 of 5 (permalink) Old 02-17-2014, 08:11 AM
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Not true.
Otherwise, there wouldn't be a set measurement for cam journal diameter in the service manual.
You'd have a situation like the rod and crankshaft bearings where each has a marking to match bearings for proper cleareance.
The cams ride directly on the journals in the head, and there are no bearings.

Last edited by SubSailor; 02-17-2014 at 11:14 AM.
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post #3 of 5 (permalink) Old 02-17-2014, 01:44 PM Thread Starter
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Looks like someone took a pencil grinder to the head close to where the valve sits and also where in the cup that holds the cam shaft. Bit of scoring on cam shaft hope I can get it polished out. Mmm some people.
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post #4 of 5 (permalink) Old 02-18-2014, 11:24 AM
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I'd be looking for another mechanic. Sorry for your trouble. Is the cam scored a bit too? Pictures would help.



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post #5 of 5 (permalink) Old 02-18-2014, 11:56 PM Thread Starter
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Yep, taking to another mechanic today. Cam is scored too. No pics at the moment. Will post some as soon as I get them.
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