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Old 08-28-2005, 11:02 AM   #1 (permalink)
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Default '96 ZX-6R Tuning

New to the forum. I have a 96 zx6r that I recently moved with me from Ohio to boulder Co. The bike seems to be running a little sluggish, could be the power loss simply due to the elevation or maybe I need a little better tune. I was wondering if anyone here has any experience with the above that could help me out. The bike has a D&D slip-on and I'm pretty sure stock tuning. I tore down the carbs when I got here to check where they were at and it's running the stock needles with no spacers, 150 jets, float height of ~17mm, and it still had the caps on the mixture screws (when I removed the caps the screws were barely turned out, between 0.5-1.5 turns for each carb). I think that's pretty much everything. Thanks for any help.

Mark
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Old 08-29-2005, 01:09 AM   #2 (permalink)
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Another quik question. Does anyone know if 150's are the stock jets for my bike. If you look at the online parts diagram it shows both the 145's and 150's as "non-racing", but it also shows a quantity of 2 for each. Mayeb if anyone has a service manual they can help me out on this one.
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Old 08-29-2005, 02:30 AM   #3 (permalink)
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The inner two jets are a different size to the outer two jets. I think (going from memory here) that two of the jets are 150 and the other two are either 148 or 145, in stock form.

One of the best things you can do for the tuning of these bikes is to get some Muzzy/Factory/Dynojet needles. They make a big difference.
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Old 08-29-2005, 03:38 AM   #4 (permalink)
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Is it possible to just pick up the needles? And correct me if I'm wrong, but the 150's would be on the outer carbs and the 145's on the inner carbs. Do must people keep the staggered jet sizes when I install a jet kit or do they go to just one size carb? Most of the literature I've seen uses a single size jet.
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Old 08-29-2005, 04:02 AM   #5 (permalink)
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And since I haven't replied to my own thread enought already, factory pro makes a big deal out of the 95-97 carbs...

"STD drop-in carb recal kit
NOT possible...no way, no how. If anyone tries to sell you something that "drops-in" - forget it. Call Muzzy, call us. It's just not acceptable.
And if you do find a "dropin" kit, the only way that you'd think that it works is if you test it on a dj dyno - :-)"

"1.7 RaceKit
Slightly complex to install. Use with stock or aftermarket exhaust, makes best power, overall. Period. Used by nearly every Pro AMA roadracer in 95.5 to 97 and absolutely the best performing kit for on and off track use. When properly tuned, this kit produces the best low-end and midrange possible - and adds 2-3hp to the top-end power. This is the ONLY kit to use.
Sure - it's a bit more expensive - but there's more parts in it. But - if it takes more parts to make the bike it's best - that's what we will do.
This kit was the first of Factory Pro's "1.7 RaceKits" and the development of this kit was only possible with the 4 Gas Factory Pro EC997 dynamometer system. Other companies, using dj dynos, were incapable of refining the 6r's odd, stock carburetion configuration into a setup that produced more power, not only on a dyno - but on the track or street, too.
Base settings for stock and aftermarket exhaust systems and slip-ons included along with the famous "Pink Sheet" - Factory Pro's CV Tuning Guidelines for getting the tuning perfectly adjusted for the smoothest, most powerful machine possible."

link: http://www.factorypro.com/Prod_Pages/prodk59.html

Is it really that hard to tune these carbs? I was reading somewhere on factory pro's web site that it took them something like 6 weeks to really get this kit to work correctly. That just seems excessive.
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Old 08-29-2005, 11:09 AM   #6 (permalink)
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Yes, you can buy Muzzy needles on their own. I'm not sure about Dynojet or Factory.

150's on the outer carbs and 145's on the inners sounds right to me. I don't know whether most people use a single jet size when they re-jet their carbs. I stuck with different sized jets, and so did one of my far-more-knowledgeable-than-me friends.

It wouldn't really surprise me if Factory took six weeks to get the development of the carb kits right for the F model ZX-6R. Those bikes were known to be difficult to jet properly, when they were first released. As time went on, more was learned about them and I think they're fairly easy to jet properly, now that all the development work has been done.

Of course, I doubt they'd have been working around the clock on the kit either.
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Old 08-29-2005, 07:33 PM   #7 (permalink)
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Nigel,

Just wanted to say thanks for all of the help. I think I about have everything figured out, this weekend I'll be tuning the thing in correctly. Once agian, thanks.

Mark
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Old 09-10-2005, 02:55 AM   #8 (permalink)
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How did it go? I have a 1995 that I am trying to figure out. Do you have any jetting specs. Thanks.
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