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Post by popeye69 on Feb 27, 2024 21:11:54 GMT 1
Whats the cure for a wobbly, at header, standard exhaust?
1980 RD350LC.
(RememberI had this with my RD250LC over 40 years ago and Yamaha replaced the pipes, quite sure they won't do that now)
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Post by urbantangleweed on Feb 27, 2024 21:32:20 GMT 1
Whats the cure for a wobbly, at header, standard exhaust? 1980 RD350LC. (RememberI had this with my RD250LC over 40 years ago and Yamaha replaced the pipes, quite sure they won't do that now) Usual thing is to cut a piece of wire coat hanger, wrap it around the exhaust between the flange and the clamp and that fixes it by taking up the slack in that joint. |
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Post by chrisg on Feb 28, 2024 10:50:00 GMT 1
Is the spacer missing?
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Post by masonmart on Feb 28, 2024 14:18:13 GMT 1
There was never a spacer but a crush gasket that disappeared quickly. I believe I have a nicer solution than the coat hanger which is 5mm carbon based HP pump packing but won't know until I get back.
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Post by Robbieben on Feb 28, 2024 14:32:13 GMT 1
There was never a spacer but a crush gasket that disappeared quickly. I believe I have a nicer solution than the coat hanger which is 5mm carbon based HP pump packing but won't know until I get back. If you are talking about the carbon fibre PTFE impregnated packing, which I think you are it may well work but needs to be crushed into place or it will burn away over time. Its stable up to 300 C in its uncrushed form, and can be used at 4-500 C for short periods but if it is crushed down to prevent blow by of gasses it can run at 6-700 C for long periods. |
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Post by chrisg on Feb 28, 2024 15:31:56 GMT 1
There was never a spacer but a crush gasket that disappeared quickly. I believe I have a nicer solution than the coat hanger which is 5mm carbon based HP pump packing but won't know until I get back. The early 350s have a spacer as well as the crush washer/gasket. |
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Post by steven on Feb 28, 2024 17:23:01 GMT 1
Hi, www.rd350lc.net/page4L0pb.htmwww.rd350lc.net/pot4LO-8082.jpgHope this helps, as said above make new wires for the flanges from a coat hanger, brazing rod or whatever you have of the appropriate size. If you search for brazing rod or wire coat hanger in the search function, you will find all the info you need. Steven. |
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Post by beardy on Feb 28, 2024 21:26:04 GMT 1
I’ve used the snap rings that go on top of fork seals in the past
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Post by chrisg on Feb 29, 2024 16:20:12 GMT 1
If the issue is a missing spacer, Norbo sells them. They were missing from my early 350 (1980) and I couldn't work out what was wrong.  |
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Post by JonW on Mar 1, 2024 0:51:37 GMT 1
I’ve used the snap rings that go on top of fork seals in the past I like that idea... for some of mine it would need to be thicker, but yep that is a good idea for most bikes. Ive often wondered why no one has made a simple replacement part for this, but it seems Yam already did. Good work Beardy! |
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Post by masonmart on Mar 1, 2024 10:38:05 GMT 1
Sorry, the Asian sun has gone to my head. The solution was to use two Norbo exhaust gaskets. I have the gland packing ready though.
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Post by Delbert on Mar 1, 2024 20:28:11 GMT 1
I can remember fitting two gaskets to get around the problem, worked a treat
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