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post #1 of 4 (permalink) Old 06-11-2019, 09:12 PM Thread Starter
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Joined: Jun 2019

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Need help

Just bought a 93 zx7r and cannot figure it out . Starts and runs good for 10 seconds. Then starts choking and bucking me around below 7k Rpms. Then after 7k and WOT the bike takes off. Then you let off gas and it drops and wants to shut off. I just cleaned the hell out of the carbs and set screws to 2 1/2 turns . Have two vacuum lines that having nothing connected , maybe issue? I know nothing. Can’t figure it out.
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post #2 of 4 (permalink) Old 06-12-2019, 06:43 PM
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From: hamilton,ON,Canada
I Ride: 1996 ZX7R, 1996 ZX7RR (track)

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Where are the vacuum lines? Where are they connected to? Post a pic if possible.
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post #3 of 4 (permalink) Old 06-13-2019, 07:07 AM
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From: NW Tennessee
I Ride: a quicker bike than yours.

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I'd start by getting an OEM service manual. Search the ZX7 forum for a link to a free .pdf manual. There will be diagrams showing the routing of all vacuum lines and where they should be connected.

Last edited by taildragger1197; 06-13-2019 at 07:11 AM.
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post #4 of 4 (permalink) Old 06-13-2019, 03:02 PM Thread Starter
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I just put in a universal fuel pump matching psi to stock pump, I’ve cleaned the carbs , I’ve reset screws, I’ve cleaned gas I’ve tried seafoam . Bike jerks like I’m hitting bumps below 7k Rpms like it’s struggling. And when I gun it and let off bike acts like it’s out of fuel and idles down and dies if I don’t give it gas.
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