How does a bike act when the carbs are out of sync?

 

That is hard to answer. It would depend on how bad they are out of sync. It could just be sluggish or they could be so far out that the bike wont run.

 

So it would affect the entire rpm range? Mine seems to be top end, idles great. Whenever I try to get on it tho, It spits and sputters, but eventually picks up speed.
Its like if I'm going 55 and try to accelerate quick is when it happens. Otherwise its seemingly smooth

 

When carbs are out of sync,you can hear it and wont RUN right in general,thats from idle to just giving it throttle in neutral!!

But i just went threw same issue and after swapping out carbs and cleaning,messing with my air box and swapping out coils,i realized that...............are you ready for this??

It was the freakin kickstand sensor!!!! I by passed the kickstand and issue was gone,runs like a beast!!! Check to see if the wires are loose or just cut sensor wire and connect both green wires together.

I made my bypass a cutoff switch,put a switch between the green wires and now can cut off when parked,it will not start at all,unless switch is on.

Its 3 wire sensor,yellow and 2 green,you bypass yellow and connect the greens,done deal.

I have the f4i gauges and didnt need the dummy light anymore,doesnt show on f4i gauges.But i could not believe it was the sensor,but was so happy it was,love and hate at same time,might as well get married again!!! NOT!!