KZ750 not running correctly.

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07 Jul 2010 18:25 #380883 by Ituen
KZ750 not running correctly. was created by Ituen
My bike was running fine on the 4th of July. I took it out tonight and it sounded different when I started it. It slowly revs to redline, but doesn't feel as strong. It won't go over 60 mph. The fuel light was on and I stopped and got gas. I noticed strands of the exhaust insulation coming out of the megaphone. Any ideas before I drop it off at my mechanic?
1982 KZ750 E
Kawasaki Rider

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07 Jul 2010 18:29 #380885 by asevans
Replied by asevans on topic KZ750 not running correctly.
make sure all the cylinders are firing. check your exhaust pipes.
1976 kz900 Mostly stock
1978 Z1-R Project

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07 Jul 2010 22:16 #380964 by bountyhunter
Replied by bountyhunter on topic KZ750 not running correctly.
Sounds like a clogged main jet.
1979 KZ-750 Twin

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08 Jul 2010 04:10 #380980 by Ituen
Replied by Ituen on topic KZ750 not running correctly.
I'll check it out after work. The gas tank was recently coated internally by a shop. The carbs were also cleaned a few weeks ago.
1982 KZ750 E
Kawasaki Rider

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08 Jul 2010 07:17 #381013 by djturnz
Replied by djturnz on topic KZ750 not running correctly.
If it were a car, I'd say clogged catalytic convertor. Since you are seing strands of muffler packing, maybe your muffler is clogged.
1982 KZ750 (4) LTD

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08 Jul 2010 08:45 #381022 by Ituen
Replied by Ituen on topic KZ750 not running correctly.
It's only a few "hairs" here and there. I'm going to take the V&H megaphone off and take a better look at it. (I think the rivets need to be drilled out to replace the packing).
1982 KZ750 E
Kawasaki Rider

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08 Jul 2010 12:01 #381086 by bountyhunter
Replied by bountyhunter on topic KZ750 not running correctly.
Do you have inline fuel filters? If not, you can look forward to lots of incidents where it suddenly starts running crappy....
1979 KZ-750 Twin

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08 Jul 2010 12:45 #381107 by Ituen
Replied by Ituen on topic KZ750 not running correctly.
I don't know, I have to follow the clear line to the carbs.
1982 KZ750 E
Kawasaki Rider

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08 Jul 2010 18:19 #381168 by bountyhunter
Replied by bountyhunter on topic KZ750 not running correctly.
Clear fuel line should get tossed. You need real fuel hose. That clear stuff causes no end of problems.
1979 KZ-750 Twin

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09 Jul 2010 12:59 #381284 by Ituen
Replied by Ituen on topic KZ750 not running correctly.
What kind of fuel hose should I replace it with? Something with in inline filter?
1982 KZ750 E
Kawasaki Rider

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  • ready2ryde1985
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  • got to love these kzs
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09 Jul 2010 19:37 #381378 by ready2ryde1985
Replied by ready2ryde1985 on topic KZ750 not running correctly.
1/4 inch and i like the glass cleanable screen high flow inline filters you can find booth on ebay or z1 has good stough to.
I have 1/4 inch blue see threw line.
and a long h.d glass fuel filter.
love my pingal high flow pet!!!
84 kz 700 a1
82 kz550 ltd

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10 Jul 2010 04:00 - 10 Jul 2010 12:00 #381430 by Ituen
Replied by Ituen on topic KZ750 not running correctly.
I have a "blue see-through" line, but no filter. I have to put one in. I took it to my mechanic. It was the fuel tap. I had it pointed to the "ON" position. He said I should have it pointing at the "PRI" position. Once we did that and I cleared it out, the power is back! I rode it around the block and it runs great. Thanks to everyone for all of your help.
1982 KZ750 E
Kawasaki Rider
Last edit: 10 Jul 2010 12:00 by Ituen.

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