Gsf 600

[Gooner]

This is my sons bike and we are having difficulty with the below:-
bike starts on the button but as you pull away it seems not to be running on all cylinders, if it some revs and all four are working.
So far have replaced both coils as one was faulty, fitted new plugs, cleaned carbs and balanced them.
Fuel tank was rinsed out just in case.
Bike has standard air box and exhaust.
Now thinking to change plug caps any other ideas.
Thanks in advance

[78550GS]

How was the carb clean done? Full teardown?

[Gooner]

How was the carb clean done? Full teardown?

No it was not a full tear down, could this be it?

[78550GS]

Once you get past a certain throttle position, the pilots no longer take part in fuel operations. In the lower position you mention, the pilots will be working fully.

It sounds like a pilot system is plugged up to me.

Full teardown and dip should be in order.

[78550GS]

And for future reference in this thread....

Year, model (katana?) would help.

If it is a Katana, PM me and I will give you a few helpful links.

[Gooner]

Thanks for the info the model is a Bandit 600 GSF 1998
If the revs are kept high all cylinders are firing, going through the gears the at speed no problem as soon as the gas is let off she drops to two or three cylinders, I suppose it does sound like full carb strip is needed.
Once again thanks for your input.