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Old 06-07-2008, 12:08 PM   #1 (permalink)
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From: Usaf Academy

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1987 ZX750r F1 HELP PLEASE!!!!!

I bought this bike from a guy that said he had it jetted in MASS. The bike runs okay except the wire comming from the number 2 coil wire had been cut and wrapped in duct tape. I figured that this was the cause of my sputtering idle and the bog when I hit the throttle. So I replaced the wire. It still will bogg then react. So I figured that I would clean the carbs. and check out this jetting job. So I pulled the carbs out<<<<<pain in the ass. And started at carb 1 and so on. The float bowl on the bottom was caked with rust and dirt about 1/2 inch. I cleanded it and pulled the vacume seal things and checked the needle. In the first two carbs 1 and 2 there was not any rings on the needle. But when I got to carbs 3 and 4 I found a small ring on the needles. So i figured Iwould make everything even and I took them off. I started placing everything back together and noticed that the rubber boots coming from my air box are all deformed because the last Idiot<<<<not me that had taken this apart did not place the boots onto the intake right and they sat there and formed retarded. So Can anyone tell me what this kind of bike should be jetted to at an altitude of 6,035 feet? I live in colordo springs, Colorado. And can anyone tell me where to buy parts for my bike. I am having a hell of a time finding parts. Any help would be appriciated. THANKS My friend that kinda know abou stuff like this told my that they are jetted to 115? Whatever that means
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Old 06-09-2008, 05:24 PM   #2 (permalink)
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I Ride: 1993 ZX750

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for a bike as old as yours it might be tuff finding parts. but try powersedge.com, ronayers.com, and remember for some parts ebay is your friend. as far as jetting goes i have no idea for that high of an altitude. but check your sync on the carbs. i rebuilt mine and it ran like shit till i adjusted the carbs.
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Old 06-10-2008, 09:51 PM   #3 (permalink)
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I just adjusted he screws on the top of the carbs and the bike started to run really high. So I adjusted the idle. Now I got it to a crisp throttle response. that was exactly what it needed. I have no idea what I had done to the jetting but I guess if it consumes gas excessivly<<<<,sp then I will have it jetted. I just dont want to spend alot of money on crap that I will end up just selling for a cheaper price when I sell it. I guess you just live and learn.
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Old 06-10-2008, 09:52 PM   #4 (permalink)
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Thanks for the help.
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