Question about 2000 kawasaki ZR-7

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What can cause gas leaking into the air box on a Kawasaki ZR-7?

I cleaned out all the nooks and crannies on the carbs and only while the bike is running gas shoots into the air box. when i also blow into the vent hoses on the top of the carbs gas shoots into the air box also. all lines are clear. any advice will be great full .

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  • Danny
    Danny May 07, 2014

    i cleaned out all jets with a wire and carb cleaner and compressed air.

  • Danny
    Danny May 07, 2014

    it still shoots gas in the air box with out the air filter on it. also i can blow through the vent hoses on the top of the carb and shoot gas through the jets.

  • Danny
    Danny May 07, 2014

    fuel doesn't leak when the bike is not running only when bike is running.

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  • Master
  • 411 Answers

A float valve in the carbs is sticking or the float height settings are incorrect or a float has a hole in it.

Might also be worth checking your engine's valve clearances while you are at it as there could be a slight pressure leak causing blowback.

Do not use Pri on your fuel tap until this is sorted as it could cause hydraulic lock in your engine, which will wreck it. Fuel will flow through your carbs into the engine when it is parked.
This will also ruin your engine oil as the fuel will mix with it.

Posted on May 08, 2014

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SOURCE: 2002 Kawasaki ZR-7S. wont rev up.

Check you main jets ccccccthey could need a good wiring through with needle wire cleaners or try running it without any air cleaner unit .If it runs well then could be an air filter problem.

Posted on Mar 14, 2010

  • 440 Answers

SOURCE: Fuel leaking from air box after shutting down

Hi
Thats the float valve seals not shutting off, did you clean them & set the float heights?
The overflows from the carb bottoms must also be blocked for the fuel to fill up the carbs which then leaks into the air filter
Check also that the fuel tap turns off when bike is not running

Ride Safe
Bike-Doc

Posted on May 20, 2010

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