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How important is that #2 vacuum plug?
- sakiguy
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1983 KZ750 N2 Shaft
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- rstnick
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Without it would lean out that cylinder which could cause some problem, maybe even hole a piston. :ohmy:
Rob
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1978 KZ650 C2, 130K kms, Delkevic ex, EI, CVK32, PMC easy clutch, ATK fork brace, steering damper, braced swingarm, 18" Z1R front wheel.
2000 ZRX1100
2011 Ninja 250R
2005 z750s
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- Jeff.Saunders
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By running lean on that one cylinder, you could have caused the piston top to start to melt - and the first sign of that is those specs of aluminum on the spark plug.
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- sakiguy
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I don't see any specs of aluminum on the spark plug but the little tip is white. Should I just change the whitish spark plug then?
Alright, this is what the #2 spark plug looks like right when I removed it to check. The tip is very white.
I will say that I did ride around after putting the plug back on before removing the spark plug and taking a picture. The bike was really riding nice. Feels very strong, and pulls. I also want to reiterate that the vacuum plugs on the #2 vacuum tube is a plug about the size of a valve stem cover. When I did ride without the plug it was about a 14 mile street ride going about 45mph...with a 10 minute stop...and then 14 miles back home.
1983 KZ750 N2 Shaft
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- savedrider
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- 1975 Z1-B 900
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Get right or get left! <*{{{><
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- Patton
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Good Luck!
1973 Z1
KZ900 LTD
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- KZ250LTD
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Just as a preview of what can happen with a lean issue:
:S
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- sakiguy
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On one note, I think I did have the idle adjustment screw set too high when I did run without that plug...so perhaps this created some kind of balance and saved that one piston from running to lean or whatever? Because when I put that vacuum plug back on I had to back down on the idle adjustment screw to get the idle right.
1983 KZ750 N2 Shaft
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- Kawickrice
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Other than the leanness, that plug looks healthy enough.
Just as a preview of what can happen with a lean issue:
:S
Tim what kind of motor got sacrificed in the pics? Total destruction, OUCH
73 Kawasaki Z1
07 HD CVO Ultra Classic
82 Suzuki GS 1100
74 Yamaha RD 350 (My two stroke toy)
77 Kawasaki KZ 650B-1 (My putt around bike)
80 Indian Moped (My American Iron)
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- Jeff.Saunders
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It's when you are putting load on the engine for sustained periods when it can turn into a terminal problem.
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- KZ250LTD
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Tim what kind of motor got sacrificed in the pics? Total destruction, OUCH
'83 honda xl600, big thumper, big boom
As Jeff said, it was jetted a little lean from the factory, I was just pushing it too hard for too long and it also had a few leaky gaskets = perfect storm. Went from 75mph to nothing in a very short period of time :blink:
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- JR
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.........The bike is running great now especially considering how it ran when I first got it. What a huge improvement by just cleaning the carbs/jets and giving the bike a carb sync. No more having to run with the choke on, no more stalls at idle, just smooth running, both on street and freeway. Too bad it is getting a bit too cold out to ride .................quote]
Thats great news sakiguy. I have watched your posts here over the past few weeks and with each one you made progress. It must give you a great feeling of satisfaction that you learned this stuff and made the bike work and run the way it should.
Well done:)
1980 kz750E1, Delkevic exhaust
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