Hanging idle...

[Rob.N]

I have a hanging idle problem. I have had this issue since I got the bike and have been unable to get it under control.

I have:

Cleaned the carbs out

Replaced all the vacuum lines

Rejetted the carbs and installed the K&N lunchbox filter

Replaced intake manifold boots


I just put the new intake boots on. When I put it all back together I still had the hanging idle issue. I sprayed the new intake boots with starter fluid and it dies immediately. Any ideas? I'm at a loss, I have read nearly all the posts on here about this issue and still can't solve it.




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[Big Rich]

I can think of 2 things: have you replaced the orings in between the intake boots and cylinder head, and what about the small orings in the mixture screws?

[Rob.N]

Just checked them all. They are all there.


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[Big Rich]

Hmmm..... maybe a leak around the fuel enrichment (choke) plungers? Or a small crack in / around the brass tubes for the fuel enrichment circuit?