Question about 1999 kawasaki ZZR 600

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99 kaw600 ninja runs great upto 6000rpm then falls on face.Cleaned fuel filter,looked for shorts,chaned gas,cleaned carburetor(140 main jets)no change.The bike has a D&D exhaust on it.HELP!

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  • Anonymous Mar 31, 2014

    I want original main jet number and pilot jet number ofcarburetorof Bajaj boxer ct deluxes because someone has changed the jets of carburettor iam facing the milage problem so iwant original main jetand pilot jetof Bajaj boxer ct del 100 cc K_tech engine to replace the same for the good mileage


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Hi and welcome to FixYa,

It would seem a lean air/fuel mix. Pls check your sparkplugs and note color. If it is very light brown almost whitish, then it is confirmed to be lean. If so, possibly an air leak in the airbox/enclosure. Another possibility is if the bike is using aftermarket free breathers such those from K & N. If yes, try restricting the incoming airflow. Temporarily install upholstery foam over the after market air cleaner. You may have to experiment with the thickness.

Would appreciate a postback on the results and any developments.

Good luck and thank you for using FixYa.

Posted on May 12, 2009

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