I have a bit of spare time at the moment so am trying to sus out why my MC21 doesnt pull into the powerband porperly, I sent some time on this last year with Barry, we have eliminated the thought that it could be the valves by having them locked open, this didnt solve it and they seem to turn freely when connected up.

So I figured its time to check the carbs, I did this and found it was running 175 180 main jets, I am also using the oil pump and do not think the powerjets are blocked...this seems way to big for me, but does anyone know a way of checking if the power jets are blocked or not, I cant get the ally screws out as they seem stuck.

The bike is relatively standard apart from modified air box, carbon cans and an m-max.

I want to put the bike back to standard and start from there but I cant seem to ge at the powerjets...any ideas?

I have blown down the power jet tubes into the carbs and they seem clear...does this mean they are not blocked ?