Well this makes alot of sense but I'm surprised nobody mentioned it before.. the solution to my rough idling was in the end the muffler. I had bought a replacement several months ago but never got around to to installing it. The last mechanic that had worked on it said it leaked. Since it seemed imp[ortant that there be good flow through the early parts of the system it dawned on me that the muffler may be a problem and it was. After putting it on my bouncing idle stopped bouncing.


Yeha

The only remaining problem is that it hesitates sometimes when accelerating from a dead stop.

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MB 72 250 M130.923 114.011 170k The Beauty

Cool move on the muffler, woulda never guessed that!

Your hesitation is almost certainly caused by a crusty accelerator pump.
Try cleaning it, or replace.

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Ed
1981 300CD (Benzina)
1968 250 S (Gina) 266,000 miles!
1983 Alfa Romeo GTV6 (Guido)
1976 Jaguar XJS-saved a V-12 from the chevy curse, what a great engine!
1988 Cadillac Eldorado (better car than you might think!)
1988 Yamaha Venture (better than a Wing!)
1977 Suzuki GS750B
1976 Yamaha XS 650 (sold)
1991 Suzuki GSX1100G (Shafty Gixser)
1981 Yamaha VX920RH (Euro "Virago")
Solex Moped
1975 Dodge P/U camper


"Time spent in the company of a cat, a beer, and this forum, is not time wasted!"

I have been able to get better accelarator by adjusting the choke covers and the idle mixture. Now at least it doesn't choke whebn I hit the gas hard.

On another note I somehow cracked one of my brake pads and thus the horrible sounds coming from them!

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MB 72 250 M130.923 114.011 170k The Beauty

You seem to be having all the same probs as I've been having (well maybe not ALL) - I've been browsing through and alot of your posts have helped me! Have just discovered a wierd idle problem and found that the central muffler has a gigantic hole in it! Down to get a new muffler she (the Finnie) goes...and hopefully she will be perfect again.

Thats funny, I was going to post about how good mines been running since I addressed the same problem. Yesterday it was almost nimble out there! I haven't comitted to keeping mine so I just wrapped the resonator up while I decide.
Mark

Those darn mufflers.. The hard part is commiting to buy a stainless system ... with the new muffler I put on the end of my system it has been much better.. I imagine the resonator is probably clogged a little but I think it is still intact.. I should check it again.. I'm not smelling exhaust anymore so it think it's solid. The exhaust comes out with a good bit of pressure so I guess that's good?

So what is the resonator all about anyhow?

I still get a intermittent rough idle though.. I did a quick tuneup this past weekend and foudn the idle was low?? I adjusted that and sprayed the idle bores with cleaner and the chokes and it's running more evenly.

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MB 72 250 M130.923 114.011 170k The Beauty