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Discussion Starter #1
Anyone got some recomendations for jets size and needle position.
Im in the process of tweaking my carbs with factory pro kit.

right now I have 132.5/135 main jets and am using second needle position. Thats what they said to start with. But seems worse than original.


98 6R. TBR slip-on. No poser add-ons.
 

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I just went through this and swjohnsey helped me out a whole lote, so i in turn will relay this onto you. I ride a '02 zx6r, i installed everything right and went through pain and hassles for several days, almost a week. I ended up going through 250 dollars in beer and a whole bottle of Aleve. This solution is so simple. Do what the directions say, and then take it and have it dyno tuned. I know it's a pain in the ass and costly, but it is a must. Mine is going in to get dyno'd on this coming Monday, runnin me about $155.00 for the dyno tuned w/ before and after results. I think it's worth it. right now my bike runs like shit, because my air/fuel mixture has to be tuned. Not only do i not have the balls to do it, but i simply do have the tools or the know how. Just take some advice, go as far as your are confident of doing a good job, leave the rest for the pro. That's all i can say. If you have any questions ask swjohnsey he hlped me out tremendously.

Brian

p.s.
What are some symptoms of your bike, mid-rang sputter, high-end stalling or pausing? Just out of curiousity!

A wise man once said worrying is like sitting in a rocking chair, it gives ya something to do, but doesn't soplve the problem!!!
 

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Discussion Starter #3
Actually ive run into several inconsistencies on these carbs. For example, The main jets it says where 135/137.5 stock. NOT, mine had all 145 in them. I bought It brand new and am wondering wtf is up.

now it has a part throttle hesitation at midrange. I just moved needles up one. Hope to get to test this weekend. I know what all the settings do, its just a matter of testing and tearing it down for the next month. LOL




98 6R. TBR slip-on. No poser add-ons.
 

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Discussion Starter #4
ahite..here some good settings for factory pro TI jet kit.
Basicaly what they recommended but a samll change.

stock advancer
slip on TBR pipe
Mains 132.5 out/135 in
pilot jet 17.5
factory springs and needles.
3rd clip on the needle (had hesitation on recommended 2nd clip)
2.5x fuel screws. (recommended 3x was little rich at idle)

very smooth on and off throttle and fairly linear pull all the way to red line. Im no expert, it just feels sweet now.

98 6R. TBR slip-on. No poser add-ons.
 

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I am pretty sure the stock main jet sizes vary by year. For the '95-97 ZX-6R it is 145 in 1&4, 150 in 2&3. The differenct jets in the middle two is because of the exhaust configuration. For 4-2-1 exhaust I think it changes. The Factory Pro jet sizes are consistant with stock sizes. I don't think DynoJet is. If you are quite a bit above sea level you can get power improvement with smaller jets. At sea level you might be able to go richer than stock.

I don't have any experience jetting other than on my own bikes so take this advice for what it is worth.
 

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the stock mains on my bike are 137.5 outer, 140 inner. And i have a factory TI jet kit so it uses the same numbers as the stock jets. Im near dallas, TX, so I would imagine that would be close to sea level, and not too much above sea level.
 

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Yeah, Dallas is about 500 feet above sea level. If it were me I would try one size larger mains and one size smaller mains and see which pulled best from about 8,000. After you get the right mains you can adjust the needles to get good midrange. I am literally at sea level and dispite current wisdom I actually got better top end by going one size larger on the mains. If I am not mistaken, usually they go a little smaller and then raise the needles.
 
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