is there a way to balance carbs off the bike im missing one of the springs on the linkage that the throttle goes on so one butterfly is opening right away and the other takes a little bit to open so im gonna take the carb off and put in the spring and was wondering if there is way to balance or do i just need to line up the butterflys

and if someone has a pic of the spring i have several but not sure which one to use

Look at the pic at the bottom of THIS page and tell me if you need more.

now to my other question is it possible to balance the carb off the bike

yes.  i use the 4 small holes at the bottom of the butterflies as reference points.  you can adjust the position of the butterflies using the air mixture screw that links the two together.  simply open and shut the spring side and adjust so that both butterflies have the same rate of travel and position.  works like a charm every time... butta smooth.

thanks much appreciated im gonna try that later on this afternoon i let you guys know how it turns out

hey guys wanted to let you know it worked like a champ i measured the butterfly with a ruler but i think what saved me was that the screw on top had never been messed with so all i had to do was slide a spring in now my idle is steady at about 1300

next up tires and a paint job