Hi All
My bike is running rich on idle. So I took my trusty angled screwdriver down to the bike to see what the mixture screws are set at, and of course found a bloody big frame spar in the way. So I may as well adjust it using my gunsons gastester (be nice to actually use some of the crap I buy for once ). So how do you adjust them. Is it a tank off and rig up a temporary fuel supply? I assum ethe mixture screws are on teh undersid eo fteh carbs? Any tips, do's or don'ts?
Many thanks.
This thread will help you lift the carbs off http://www.bikersoracle.com/zx9/forum/s ... php?t=2375
then adjust the pilot scews to 2 turns out from gently fully in, these are forward of the float bowl drain holes and could be hidden under a plastic bung, if so prise out.
I keep trying to remember where your located, as you've not put it on your profile.
yorkie wrote:This thread will help you lift the carbs off http://www.bikersoracle.com/zx9/forum/s ... php?t=2375
then adjust the pilot scews to 2 turns out from gently fully in, these are forward of the float bowl drain holes and could be hidden under a plastic bung, if so prise out.
I keep trying to remember where your located, as you've not put it on your profile.
I must have missed that bit when I did my profile? But I've done it now.
It seems fine when actually riding, just a bit fluffy coming off idle. Also if you rev it the revs drop and take a moment to rise again which normally indicates a rich idle?
Before i did the float bowl modifcation thing it didn't do this, so I'm wondering if someone richened the idle up to try and compensate for the problem?
And make sure you have no air leaks in the ram air system, Air box, carbs or carb take off's. have had that before.
Coming back up the road from a certain party last year, the bolt i had jammed in the pipe coming off the carb balancing hole under the carbs came out. It was very reluctant to tick over properly after a good kicking and coming to a stop the revs would drop like you say(Below idle)Then rise back up to a stumbly normal idle.
Still kinda went OK though, Mind you i just asked about this, Mines is still very spluttery when pulling away adn stinks o petrol when first started.
The idle sped is ok once its settled, but if you rev the bike up as the revs drop it will idle really low for a second or three before working its way up to the normal idle speed. typically this means its running too rich and i'd like to address that and of course play with the gas tester.
Peasngravie I had a similar problem on a bike once and it was a sticking float messing up the float heights.
So I may as well adjust it using my gunsons gastester (be nice to actually use some of the crap I buy for once 
). So how do you adjust them. Is it a tank off and rig up a temporary fuel supply? I assum ethe mixture screws are on teh undersid eo fteh carbs? Any tips, do's or don'ts?
But I've done it now. 
