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Kz550ltd carb woes 09 Jun 2021 10:54 #849892

  • Kevin76
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Hi guys, I’ve been lurking in this forum for a while, recently bought my KZ550LTD which had been in storage for a vast number of years 
anyway, a couple of months work got it back on the road but I do have a very slight issue.

my bike runs fine until the last 1/5 throttle, then it bogs down slightly
the plugs are showing a good burn.

one of the problems the bike had when I got it was a jammed ignition advance, which freed up quite easily…
but on investigation the main jets are 105’s instead of the 95’s I expected.
I wonder if the previous owner didn’t recognise the stuck advance and tried to compensate with a bigger main?
now…this is where it gets interesting.
The float bowl vent pipes are blocked off…and it runs beautifully like this.
if I unblock them it splutters a little and has no top end…

any advice?

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Kz550ltd carb woes 09 Jun 2021 13:31 #849908

  • hardrockminer
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Are your floats set correctly?
I have a couple of Z1B's restored, an '80 KZ1000LTD restored, a 1981 KZ550 restored and a 2008 KLR 650 for off road fun. My wife has a 2019 Suzuki DR 650 for on and off road.
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Kz550ltd carb woes 09 Jun 2021 16:05 #849920

  • loudhvx
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Return things to stock per the manual and see what you got. It's possible the previous owner modified several things to compensate for perceived problems or misdiagnosed problems.

There is a link to Tk22 carb website in my signature. It has some hints not covered I the manual.
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Kz550ltd carb woes 10 Jun 2021 04:54 #849943

  • Kevin76
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Thanks for the advice guys,I changed the 105 jets for 95 and voila….normal service was resumed
simple case of over jetted

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