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Thanks for all your help and effort. It seems to be an enormous knowledge in this forum. I have fixed the "advance mechanism". The springs where OK but it was quite dirty. Since I have to remove the whole "cup" (pointers and stuff) because the advance mechanism sits behind the po...

The two usual reasons for a high idle are: 1. When you tuned the carbs, the bike wasn't warmed up enough. The carb tune should be done after a 20 mile/minute ride. 2. The advance mechanism is sticking. Front of the engine, down amongst the points. If it's the advance mechansim, new carbs won't help...

First two guesses: If it was caused by your carb work: if you removed the butterflies from their shaft, then perhaps they are not aligned properly, and thus not closing properly. If it's unrelated to the work you did: sticky advance mechanism. The problem was there before my carb work and also othe...

I have a R100S 1979. It is in good working order and was recently serviced. Now I have cleaned the carburetors (Bing) and the bike runs nice and smooth. But when the bike is really warm after 40 min drive the idle hangs (in about 2000 rpm). I can get the idle to normal by breaking with the clutch en...