How many turns.

[roverfj1200]

Been playing with the carbs on my 88 and before the clean the idle screws where at 2 1/2 turns but now after the clean have turned them out 4 turns to get them running good. Does this seem right. And what affect will it have.

Cheers.

[andyb]

That does not sound proper.  Doublecheck the order that you replaced the washer, oring, and spring in that area.  Or did you change pilot jets or the like?  And more tellingly, did you alter the synch?

Your mileage will go down fractionally with them that far out.

[bigbore2]

Did you synch carbs?

[roverfj1200]

I had them set at 2 1/2 turns which was the same as they where before I cleaned the carbs. At this setting I had a mixture miss of sorts on roll on and roll off. So I Balanced the carbs and played with the idle screws and found that at 4 turns all sounds sweet. Bike runs well will see how the fuel economy goes.

Now what do these screws adjust I take it it is air for closed throttle. Out is more and in is less?

Never changed the needles on the slides only cleaned them...

Cheers

 

[Arnie]

Now what do these screws adjust I take it it is air for closed throttle. Out is more and in is less?

NO, those screws adjust an additional amount of fuel&air mixture.  Out is more, in is less.

Arnie

[yamaha fj rider]

Arnie is correct four turns out gives you more fuel, richer mixture at idle and throttle opening just above idle then it goes to the pilot jet. Hope this helps.

Kurt   

[yamaha fj rider]

Did you do or change anything else? or just clean the carbs. 

Kurt 

[roverfj1200]

I have a K and N filter in there but that has been in before the clean. Was running rich then.

Off on a 2000km run this weekend that will test the fuel economy and I can screw them in if the pipes start to run black..

Will see how it goes.

Cheers

[Pat Conlon]

Richard, use the blip test to verify your settings.