Gs550 carbs

[montjuic]

I have cleaned 2 sets of carbs both with carb cleaner and ultrasonic but on start up the chokes on both sets hardly work am I missing something both sets off carbs have had rebuild kits fitted (new jets etc ) but the bike hardly revs when on choke and is a pig to start, any ideas most welcome

[Nessism]

You might want to check the Newbie Mistakes thread linked in my signature to see if anything applies.

[geol]

I have cleaned 2 sets of carbs both with carb cleaner and ultrasonic but on start up the chokes on both sets hardly work am I missing something both sets off carbs have had rebuild kits fitted (new jets etc ) but the bike hardly revs when on choke and is a pig to start, any ideas most welcome

You might want to start by putting your bike year/model in your signature. It can be changed by clicking on the Settings link at the top right of the page. The year/model makes a bit of a difference when giving help of this sort since the early 550s had VM carbs, the later had the two-two barrel carbs and BS series carbs; all a bit different to say the least. None had a choke but all had enrichener circuits which behave a bit differently than a choke when starting your bike and need to be verified when cleaning.

[montjuic]

sorry should have stated 1978 gs550ec with vm22 slide carbs, I have cleaned and ultrasonically cleaned and blown out with compressed air every hole/orifice but on start up when the choke lever is used about halfway the bike is a pig to start and only revs to 1500 rpm if that, if the lever is lifted past halfway it bogs down and won't start, it's as if the choke/enricher isn't working.
Any ideas please

[tom203]

First , you probably didn't get the "choke" circuit clean- each carb uses small passage that picks up fuel from bowl mixes it with air to enrich mixture for cold start purposes. Have you seen this link?

http://members.dslextreme.com/users/bikecliff/images/vm_carb_rebuild.pdf

don't lose the original carb parts- rebuild kits often contain inferior parts. Mostly the o-rings need replacing, the metal parts don't wear much.