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Forums: Public Access
Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Valve Guides
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<blockquote data-quote="timetraveller" data-source="post: 100139" data-attributes="member: 456"><p>I had the same thing happen but in my case there was no noise that I was aware of. It was not until I took the bike apart for something else that I found no lower guide and the lock ring in three pieces up with the valve spring. No, I don't know how it did it either. I got an over sized guide made up and reamed the hole. What you do after that is up to you but remember that the big port heads did not use lock rings. At least for the time they expected big port headed engines to run they must have though that it was safe to run without lock rings. If that is not to your liking then there was a lower guide, made in Germany I think, which was made as one piece consisting of the guide, a tube going upwards with a slot in the side to let the rocker enter and the top was a fit against the base of the top guide. This ensured that the guide could never move upwards unless the whole top end disintegrated. I think that the chap who invented and made those is no longer around but once you have understood the idea you can come up with something yourself which would mimic the idea by fitting one on top of the lower guide and being trapped by the upper guide. I designed one for a local chum with the same problem.</p></blockquote><p></p>
[QUOTE="timetraveller, post: 100139, member: 456"] I had the same thing happen but in my case there was no noise that I was aware of. It was not until I took the bike apart for something else that I found no lower guide and the lock ring in three pieces up with the valve spring. No, I don't know how it did it either. I got an over sized guide made up and reamed the hole. What you do after that is up to you but remember that the big port heads did not use lock rings. At least for the time they expected big port headed engines to run they must have though that it was safe to run without lock rings. If that is not to your liking then there was a lower guide, made in Germany I think, which was made as one piece consisting of the guide, a tube going upwards with a slot in the side to let the rocker enter and the top was a fit against the base of the top guide. This ensured that the guide could never move upwards unless the whole top end disintegrated. I think that the chap who invented and made those is no longer around but once you have understood the idea you can come up with something yourself which would mimic the idea by fitting one on top of the lower guide and being trapped by the upper guide. I designed one for a local chum with the same problem. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Valve Guides
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