Question about kawasaki KZ 1300 A2 Motorcycles

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I have an 81 KZ 550, It was running fine till my son borrowed it one day. Next time I rode it, it was running rough, wont rev over 5000 and wont idle when hot. Sounds better with choke on slightly but still wont go over 5000 rpm. I pulled the carbs and removed the float bowls. Looked at the jets, some were stopped up slightly, and reset the floats so the bowl is just about to the top with gas. Put it back together and absolutely no difference at all. Same symptoms. Is there something besides Carbs to look at with these symptoms? Plugs were black and sooty.

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The engine was probably run at too high of a speed, and perhaps scored the cylinder walls, or worse, damaged some engine bearings. That would increase friction which would make idling hard. Rotate the engine by hand, or through the transmission, with ignition switch OFF. Are there any tight spots in the motor rotation? You may have to put the tranny in one of the higher gears, assuming it is a manual shift tranny. Good luck! Do you run Lucas Oil Treatment in the machine? If not, you should!

Posted on Apr 29, 2017

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Posted on Jan 02, 2017

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SOURCE: carbs problem

Remove the fuel line from the carb. Turn the gas on > got flow? If not then clean the fuel line and petcock filter if it has one. Install an in-line fuel filter or replace the present one. Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Use compressed air to assist in cleaning. Is the float needle stuck closed? Be certain the vent tube and vent port are clear.

Please rate this solution. Thanks d_vickers2!

Posted on Apr 20, 2009

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SOURCE: 81 xj650lh midnight maxim black exhaust, sooty plugs keep fouling

hi,fairly common problem with modified exhaust,start with the pilot screws,turn right in untill the screws are firm then back out 1 and 3/4 turns,this is a fairly standard rule of thumb that will get most things going,as far as the jets go,the original size would be a good starting point,but you should only need to go up 10-15 sizes to compensate for the exhaust mods(ie stock might be 127 may need to go to138 or 140 etc),the other thing that i would recommend is getting hold of a set of damped carb balancers these will enable you to get the mixtures and carb balance dead right,they are relitively cheap and easy to use and will have paid for themselves the first time you use them.(i regularly get 4-8 sometimes 10-11 extra hp over stock by tuning the carbs up properly).hope this helps

Posted on Jul 06, 2009

  • 3567 Answers

SOURCE: need setting for carb. adjuster on bottom of carb

Turn the adjusting screw all the way in until it LIGHTLY seats. Now back it out one and one half turns. Do the same adjustment for the throttle screw on the right side of the carb. You are now back to the stock factory settings.

Could you take a moment and rate my answer? Thanks!

Posted on Sep 20, 2009

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