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81 KZ750 LTD Starting Problems
- mariozappa
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Did you take these out when you used the ultrasonic cleaner?
1977 KZ650C1
and the KZ650/KZ750 Conversion
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- brox
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From Bismarck, ND
1981 KZ750 LTD w/Kerker Header
2006 KTM 200 XCW
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- bountyhunter
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Anybody else out there have any ideas? It does start with a very quick shot of starting fluid in the airbox.
The carbs haven't been synched since I have owned it, could this be the problem?
No. Hard start cold and good running hot is a classic lean condition. The choke is not riching the mixture enough.
Just a thought: when you crank it to start it, do you close the choke and leave the throttle CLOSED? If you open the throttle as you crank, the choke doesn't work.
1979 KZ-750 Twin
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- bountyhunter
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I don't know if this will help you, but I've recently had a bit of trouble starting mine. Too many kicks, then a backfire and starts Decided to take a look @ the plugs, before starting it. Eventhough they looked pretty good there seemed to be a bit of carbon on the electrodes. Took some 600 grit sandpaper and just lightly cleaned them up. Put them back in and it started on 1 kick, after setting a week. I've thought I may be running a bit rich, and this seems to have proven that. Gonna go down a size on my pilot jets and see if that clears up the slight carbon issue
Good point. gas is a great solvent, and if your plugs are fouled: the "cranking time" is needed to get enough gas on them to clear the tip enough to fire.
Try cleaning the plugs and seeing if it still hard starts when cold.
1979 KZ-750 Twin
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- brox
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From Bismarck, ND
1981 KZ750 LTD w/Kerker Header
2006 KTM 200 XCW
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- brox
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From Bismarck, ND
1981 KZ750 LTD w/Kerker Header
2006 KTM 200 XCW
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- wiredgeorge
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I hate to tell someone to use one of these tools since they are basically destructive in nature; you will be scraping the small hole inside the pilot jet so please take it easy. If you start to see any brass flakes you are WAY too vigorous with the thing.
Next, turn your pilot mixture screws to 2 turns out and give it a shot. If you continue to have problems, you may have internal obstructions that are blocking internal passageways.
wiredgeorge Motorcycle Carburetors
Mico TX
www.wgcarbs.com
Too many bikes to list!
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- brox
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I am confused because my Clymer manual calls the pilot screw a pilot air screw and says that as you turn it out, you lean the mixture. I am assuming this is a mistake in the Clymer book.
When I get the pilot cleaning tool, I am going to give the pilots a good cleaning.
Also when it warms up here above 50 degrees, the bike may run better.
From Bismarck, ND
1981 KZ750 LTD w/Kerker Header
2006 KTM 200 XCW
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- Qdude
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- It is all good.
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77 KZ 650 C1.
77 KZ 650 C1.
Crashed-Repaired, Pods, Kerker pipe, re-wired core bundle, lamp upgraded, homemade rectifier, solid state regulator , Dyna-s ignition, repainted, slightly modified, year-round commuter
Honda Metro 85 mpg Scooter. Dont laugh I will throw it at you
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- brox
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From Bismarck, ND
1981 KZ750 LTD w/Kerker Header
2006 KTM 200 XCW
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- brox
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From Bismarck, ND
1981 KZ750 LTD w/Kerker Header
2006 KTM 200 XCW
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