Having battled with the erratic idling, and unsuccessfull carb sync, I tried something different tonite.

With the bike idling, I sprayed "Quick-Start", onto the rubber mounting boots of the carbs...Almost instantly the idling changed, slowed and the engine stalled.

So I assume one can conclude from this, that the boots are leaking?

Question is do these boots "seat" less well, after a few removals of the carbs, or pehaps develop "leaks" over time?

I don't wanna spend the money on new boots if there is a better solution.

Regards,
Gerrit

 

they seem to harden and not seal as well.
try playing with them a bit,maybe just not seated correctly.

 

I had to replace my carb boots too. i sprayed carb cleaner on them and the and it changed on me too. i replaced the boots, sprayed it again, and the idle STILL changed. i re-checked and then even checked AGAIN that i installed them well.. perfect every time. but the idle still changed when i sprayed carb cleaner on them. my theory to this day is that when you spray them, the mist and vapor gets sucked in through the air box. i could be wrong... but there is NO way my boots are leaking. i also put a thing layer of grease on the inside of my boots for ease of installation and a better seal.

i am not telling you NOT to replace them, cause my old ones were hard too. but just letting you know how they reacted to the carb cleaner.

 

use propain it sinks and you can really get a feel for where its leaking (the idel will pick up with a leak)