Question about 1985 kawasaki ZL 900 A1 Eliminator

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Bike surges between 5 and 6 grand while cruising.

Bike surges between 5 and 6 grand while cruising. Does not surge under heavy acceleration . Bike is a 600 kawi zl. 1986

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It's surging because of irregular fuel supply. There are numerous circuits in a carb and x the no. of carbs. The first recommendation is to have the carbs aynchronized. Under heavy throttle a circuit other than cruising kicks in making up for the higher demand. You can sync them yourself with a manometer. They sell at the bike parts stores. Hook up four vacuum lines (supplied) and adjust the carbs to mach in all columns. good luck.

Posted on Aug 22, 2009

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Hi, Renoagoodson and the usual suspects are:
1. Extremely lean fuel mixture.
2. Dirt, rust, water, or ethanol sludge in the fuel system.
3. Sticky throttle cables.
4. Multiple carburetors not in synchronization.
5. TPS sensor out of adjustment or faulty.
6. Wrong spark plugs for the type of service.
7. Throttle bodies not in synchronization (FI)
8. Faulty O2 sensor.
9. Clogged, stuck, or faulty IAC valve.
10. Aftermarket components not compatible with ECM.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
Kawasaki NINJA ZX 12R Service Manual
OEM Parts for Kawasaki

Btw, I’m available to help over the phone in case u need at

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