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Leaky petcock -- how does vacuum leave petcock?
- SWest
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- 10 22 2014
Steve
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- drumstyx
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1984 KZ750L (L4)
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- SWest
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- 10 22 2014
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Steve
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- drumstyx
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1984 KZ750L (L4)
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- SWest
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- martin_csr
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Remove the square vacuum plate, attach tubing to the vac port, then suck on the tubing --- you should be able to suck air. Then try to blow air thru the tubing --- the BB should block the flow of air. I would go ahead & clean the thing, such as spraying carb cleaner thru the little holes.
Then clean & inspect the rest of the petcock. If no pitting or wear scratches or anything, get a rebuild kit. Some guys prefer oem. I installed a K&L kit (made in Japan).
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- LuckyLucOnBass
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bass player, bike rider, hockey fan.
1983 KZ550 M1
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- drumstyx
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I believe it's a plastic disc in this case, but I'll have a look today.
1984 KZ750L (L4)
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- martin_csr
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If air flows one way, then the problem isn't the vac cover.
The diaphragm can look good but still be bad. After cleaning the petcock body n stuff, I buffed the mating surfaces w brass wool. steel wool would work.
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- RonKZ650
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321,000 miles on KZ's that I can remember. Not going to see any more.
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- ezrider714
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78 KZ650SR Mine since 79
4-1 Mac Jet Hot coated since mid 80's
Dyna Coils
Saddlebags (I ain't skeered of going nowhere)
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- 650ed
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ezrider714 wrote: The real problem is having a vacuum operated petcock, :blink: find a manual to swap it out with, problem solved for years..... :woohoo:
+1 My '77 KZ650-C1 came with the manual petcock and I would never swap it for a vacuum one; they simply have too many problems. Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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