Running bad

[Pacey]

I've just bought a cb750, it's had k&n filters fitted, it runs fine at low revs but if I open her up nothing at all happens, would re-jetting help!! Any ideas, cheers

[LukeM]

You have a couple of choices: go back to the original air box for your bike, or plan on lots of time and effort rejetting your carbs. These units need a certain amount of vacuum to run properly.

Do a search on this forum on "rejet", read through all those posts, then decide if it's worth it.

We're here to help, if we can.
Luke M

[Pacey]

Thanks, the bikes been made into a street fighter so not sure if original air box will fit back on, might have to take it back to garage and see if they can do anything with it, ta