Help with colourtune and carb settings

[chuck hahn]

I was talking to Jeff and as i understand it..the ones they sell are very very close to the stock Zooky ones. think they are listed as KZ1000 needles. In any case, you for sure DO NOT want to see that whiteish blue!!!

If hem is seeing the regular neon blue at 1/8 he has it just aboutm as good as it can be..then at that point the carbs aren transitioning onto the mains and the pilots are of no consequence untill the RPMS return back tio idle.

It took me a few runs to understand and TRUST what i was seeing when in adjusted the bikes when i first got my colortune. Thbiought to myself.."hey this screw is in WAY to far and its perfect..what gives?? well, thats just the way that particular cylinder likes her mixture..nothing more or less. I know its counter intuitive, but it is what it is..as they say.

[hampshirehog]

Again Hamp..getting all the mixture screws to 1 to 2 out is a misnomer...each cylinder will requires its own setting based on the ACTUAL color of the cylinder. I have had some as far in as 3/4 of a turn in and the flame was perfect..others as far out as 2...so you really need to set each cylinder as it is showing you its needs

You correct that with the fuel screws - in theory. When they left the factory the airscrews were set according to spec - on the GS range that was always 1-2 turns out depending on the model. The fuel screws were set to allow this and that is why they were painted yellow and there was a warning that the bogeyman would get you if you dared interfere with them.

In practice you can tune in on either screw as long as the screws are kept under tension by the springs and as you burn your fingers (well I do) if you tweak the fuel screws it's easier to play with the air screws.

[chuck hahn]

I am someday gonna get me a 90 Degreee screwdriver for the pilot screws..someday!!!

[hampshirehog]

T
I will disagree, however, that all the settings should be even. There will be slight differences in the manufacturing tolerances of each carb and all its parts, so don't get stressed if one carb has the air screw out 1 1/2 turns and another one is 1 5/8 turns. Just do what is right for that carb.

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That's what I meant so I ediited my original post to read even(ish).

[gs79]

Brilliant advice guys, looking forward to further testing tomorrow, will let you know.

[gs79]

Think I have it nailed now got a nice blue bunsen type flame at idle and at 3500 revs, many thanks guys. Will be able to tell from plugs once the snow clears up and I get the new tyres and MOT

[chuck hahn]

Any shops have a Dyno nearby...that will for sure tell the mixture ratio. would be interesting to see just how close using the colortune really gets them.

[gs79]

unfortunately no dyno's in the area, hopefully get this awful weather out the way and then its a biking year!

[chuck hahn]

We have one..but its 90.00 an hr for them to run it for you.