carbs

I just put the carbs back on my xj700 no dice they are still sucking air from some where. Had diaphrams checked out they were good. Does any one havbe an idea. Still have original fuel petcock. To my knowledge it is almost all stock. HELP!

 

HELP!!!!!!!

 

is your idle jumping way up? just running lean? what are your symptoms? have you replaced your fuel and vac hoses? how do the boots look before and after the carbs?

 

the boots b4 look ok but had shrunk had to trim back bead so they would fit up on carbs ok could this be problem because everything else looks good.

 

oh the idle does not jump up

 

What do the spark plugs look like?

Did you bench syn the carbs before putting
them back on?

Have you checked the valve clearances?

 

have not checked valve clearances carbs were benched synched have not pulled a plug yet

 

are your synch ports airtight (the metal nipples out of the carb to engine boots). Also check the one with the hose from from it to the fuel tank vacuum port. They were the suspects on mine when I first started out...

 

sprayed alcohol around carbs and intake while engine running no change

 

if the idle doesn't jump up, and you haven't checked your plugs, what makes you say it's sucking air?

 

when I twist the throttle the motor just lays down but if I nurse it it will go .At higher speeds its fine

 

Pull all the vac lines off the boots and cap them. Including the one to the petcock. You will have to put the petcock in prime to run it. If it runs good then you have a vac leak in the petcock. My bike had this trouble when I got it. Made the last PO so mad looking for it, he sold it to me and got another bike.