www.zxrworld.co.uk

I've found a website that does jets cheap, my zxr has a micron 4-2-1 system on it and its got bad fueling so what setup is it going to need to get it running right?
Symptoms:
When at idle and the throttle is opened up quickly it will either bog down or stall
ANY application of the choke other than REALLY SLOWLY and carefully results in a stall
Stutter at 11k+rpm
When left running notable smell of fuel (no leaks anywhere)
If you could post up what engine mods you have and what jets your running aswell just to give a rough guide for users it would be awfully helpful, I want to get it running at liest half right before I get on the road.
http://motorcycleproducts.co.uk/catalog ... 8_423.html thats the link btw
Cheers
Dan

i'd say take it to a dyno, and get someone who understands jetting to do it

gem

deffo sure the choke aint sticking on dude?
The carbs might need a good clean maybee, have you put bigger mains in already, or altered anythin else?

take jakes advice and give the carbs a good clean through first, then have them balenced. even with bad jetting you should still be able to rev it, unless a previous owner has already been there and pissed about with the main jets and got it all kinds of wrong. had it been standing a while before you got it? micron systems for the 400 dont normally require a re-jet.

and as gem said if you want it jetted book it in with a dyno and have them set it up properly.

as i said in my other post for you, i have the same setup engine wise and i have #105 main jets in mine.

fuelling is near spot on, no flat spots and goes really well.