carb question

[EXXXCESS]

I have an issue with my bike reving up on its own can any one explain why this might be happening. It starts out in one carb the number 2 and then all of them follow any help would be appreciated.

[tarzan]

If your carbs are out of sync they will do that.A vacuum leak could do it too.
Does this happen only at idle?

[EXXXCESS]

Yes it will do it at idle and when it revs up I can blip the throttle and it won't rev back down.

[boyat68]

As Tarzan said,"This is a case of synchronizing the carbs correctly." One carb's vacuum will cause the others to follow. You have to get each of the carbs to be near or exact to the # 3 carb as that carb has no synchronizing screw and the other carburetors must be set to mimic the no. 3. Once this is done and the idle re-set, then the bike will operate correctly.

[SFerinTEXAS]

Can you enlighten me as to how you came to the conclusion that it starts with #2 ? BTW I also agree its a sync problem .