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Puffing smoke - need an opinion
- franknsr
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The compression checked out good so I reasoned (my wife laughs when I use that phrase in her presence) that the rings are sealing fine so the issue must be the valve seals. My plan, if you want to call it that, is to replace the valve seals without removing the heads. I’ve heard of an old trick of feeding a small diameter rope into the cylinder with the piston down, then rotate the engine slowly to hold the valve in place while you take the spring off and replace the seal.
My question is; am I barking up the wrong tree? Do these Kaw’s ever have an issue with valve seals or am I wasting my time? Should I be looking elsewhere like carburetion?
Formerly CSRchopper
1991 KZ1000P
Gone but not forgotten
1986 ZG1000
1982 650 CSR -shoulda kept this one-
Lisle Illinois, USA
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- 650ed
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1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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- mark1122
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- Keep twisting it
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76 KZ, frame gusset work,1200CC.Ported by Larry Cavanaugh, 1.5mm.over intakes, Carron Pipe, ZRX12 rear end, and seat,96zx9 front end.
01 CBR600F4i Track bike.
Cobourg, Ont. Can.
~ ~ ~_@
~ ~ _- \,
~ (k) / (z)
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- bountyhunter
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It quite posible its the seals, but if there gone ,the guides may be as well. How will u compress the springs??
I couldn't figure that out either. You have to compress the springs and remove the keepwers and springs to get the seals out. I don't think there is a "top side only" compressor tool for these valves.
1979 KZ-750 Twin
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- bountyhunter
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That's like asking if Rosie O'Donnel ever attacks the donut tray. My KZ750 is currently on it's third set of valve seals. Get VITON seals if you can find them, they last longer than butyl rubber.Do these Kaw’s ever have an issue with valve seals
1979 KZ-750 Twin
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- Old Man Rock
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Exhaust Smoke Colors: KZ900 Manual page 147...
NOTE: I realize you stated KZ650 but should be close to the same for T-shooting!
WHITE:
Piston Oil Ring Wear
Cylinder wear
Valve Guide wear
Engine Oil Too High!
BLACK:
Air Cleaner Clogged
Main Jet Too Large or Falling Off
Carb Starter Needle (Choke) Stuck
Float Level Too High
BROWN:
Main Jet Too Small
Intake Manifold Loose
Float Level Too Low
Also take a look at your spark plugs... Ceramic Insulator colors?
Are the carbs adjusted correctly, plugs may inform you if your running too rich...
OMR
1976 KZ900-A4
MTC 1075cc.
Camshafts: Kawi GPZ-1100 .375 lift
Head: P&P via Larry Cavanaugh
ZX636 suspension
MIKUNI, RS-34'S...
Kerker 4-1, 1.5" comp baffle.
Dyna-S E.I.
Earls 10 row Oil Cooler
Acewell 2802 Series Speedo/Tach
Innovate LC1 Wideband 02 AFR meter
Phoenix, Az
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- gane
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[img][/img] 1977 KZ1000A1
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- Old Man Rock
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As written as well, plug color... Don't even need to start it to check that...
Same time, unknown if this just started, only happens when cold, if goes away once warmed up, has been occurring for some time and now just getting to it etc...
He asked and we don't even know the color of the "SMOKE"...
Nor did he mention pinging noises... thus possibly bad rings... nor has he gotten to compression testings (low) for bad valve seats, sticking valve, guides/seals just as few to mention...
It can be one of many or multiple issues but to do nothing but wait for summer! What fun would that be...
Besides, at that temp, WTF else you going to do all winter...
OMR
1976 KZ900-A4
MTC 1075cc.
Camshafts: Kawi GPZ-1100 .375 lift
Head: P&P via Larry Cavanaugh
ZX636 suspension
MIKUNI, RS-34'S...
Kerker 4-1, 1.5" comp baffle.
Dyna-S E.I.
Earls 10 row Oil Cooler
Acewell 2802 Series Speedo/Tach
Innovate LC1 Wideband 02 AFR meter
Phoenix, Az
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- gane
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[img][/img] 1977 KZ1000A1
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- PLUMMEN
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Still recovering,some days are better than others.
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- Old Man Rock
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...coolant, usually combined w/the obvious smell of burning etheline glycol.grey/blue,oil.
Assuming this is a KZ900-1000, these are air cooled motors so not sure where the anti freeze is coming from...
Or am I totally missing something here...
1976 KZ900-A4
MTC 1075cc.
Camshafts: Kawi GPZ-1100 .375 lift
Head: P&P via Larry Cavanaugh
ZX636 suspension
MIKUNI, RS-34'S...
Kerker 4-1, 1.5" comp baffle.
Dyna-S E.I.
Earls 10 row Oil Cooler
Acewell 2802 Series Speedo/Tach
Innovate LC1 Wideband 02 AFR meter
Phoenix, Az
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- gane
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