Oil dripping from carburettor
- ELCouz
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Oil dripping from carburettor
09 Jul 2010 16:21
Hi,
I have a GPZ750 1982 (KZ750-R1). Every time i stop the bike and put it on it's side stand. I have drips from the Carb #1 off engine oil (dripping from the lowest part of the carb.... the drain plug). Drip eventually stop after few drops put always leave an oil spot on the tarmac.
What in hell could this oil come from?
Best regards,
laurent
I have a GPZ750 1982 (KZ750-R1). Every time i stop the bike and put it on it's side stand. I have drips from the Carb #1 off engine oil (dripping from the lowest part of the carb.... the drain plug). Drip eventually stop after few drops put always leave an oil spot on the tarmac.
What in hell could this oil come from?
Best regards,
laurent
1982 KZ810-R1 GPZ with hindle 4-into-1 pipe
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- lordbarclay
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Re: Oil dripping from carburettor
09 Jul 2010 16:38
Is it coming from the crank vent?
Are running a stock air box?
The only path for oil to the carb is the crank vent system.
Is the air box oily?
Have you checked the oil level to make you are not over filled.
If all of those question are negative,are you sure that it's oil and not gas?
R.
Are running a stock air box?
The only path for oil to the carb is the crank vent system.
Is the air box oily?
Have you checked the oil level to make you are not over filled.
If all of those question are negative,are you sure that it's oil and not gas?
R.
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- TerryK
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Re: Oil dripping from carburettor
09 Jul 2010 16:54
lordbarclay wrote:
All good things to check. Also check to see if the valve cover gasket is leaking at the back. Oil may be running down the engine to the carb boot then on to the carb.
Is it coming from the crank vent?
Are running a stock air box?
The only path for oil to the carb is the crank vent system.
Is the air box oily?
Have you checked the oil level to make you are not over filled.
If all of those question are negative,are you sure that it's oil and not gas?
R.
All good things to check. Also check to see if the valve cover gasket is leaking at the back. Oil may be running down the engine to the carb boot then on to the carb.
1977 KZ1000
GSXR swingarm and rear brake
WM6 rear Akront rim
Wiseco 1075c pistons
33 smoothbores
stage 3 Web Cams
Head porting
Dyna S ignition
Lockhart oil cooler
Wiseco header
1980 Z1R drag bike
1200cc
38 Flatslides, .
500' cams
7" slick
Dyan 4000 SP ignition
etc
Ontario, Canada
GSXR swingarm and rear brake
WM6 rear Akront rim
Wiseco 1075c pistons
33 smoothbores
stage 3 Web Cams
Head porting
Dyna S ignition
Lockhart oil cooler
Wiseco header
1980 Z1R drag bike
1200cc
38 Flatslides, .
500' cams
7" slick
Dyan 4000 SP ignition
etc
Ontario, Canada
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- ELCouz
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Re: Oil dripping from carburettor
09 Jul 2010 17:07
thanks for the help guys!
There's some oil sludge around the breather tube (connected to the vent)
Yes everything is stock except the pipe.
yes i've cleaned it.
I'm 1/16 over the glass sight but somebody say in this forum if you are a little bit over its no big deal.
Everything is clean around the valve cover gasket...
Is there a filter inside the crankcase breather compartment (bulge with the screw)?
Have a nice day!
Laurent
Is it coming from the crank vent?
There's some oil sludge around the breather tube (connected to the vent)
Are running a stock air box?
Yes everything is stock except the pipe.
Is the air box oily?
yes i've cleaned it.
Have you checked the oil level to make you are not over filled.
I'm 1/16 over the glass sight but somebody say in this forum if you are a little bit over its no big deal.
All good things to check. Also check to see if the valve cover gasket is leaking at the back. Oil may be running down the engine to the carb boot then on to the carb.
Everything is clean around the valve cover gasket...
Is there a filter inside the crankcase breather compartment (bulge with the screw)?
Have a nice day!
Laurent
1982 KZ810-R1 GPZ with hindle 4-into-1 pipe
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- 650ed
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Re: Oil dripping from carburettor
09 Jul 2010 18:06
OK, I'm trying to figure out a way to be positive that it is or is not coming from the breather through the air filter box. If you were to wipe the carb clean and air filter box clean how far could you ride before this problem would occur again, or does it occur every time you use the side stand even immediately after cleaning the airbox? I'm thinking that if you clean the carb exterior really well and dust it with flour or something like that you should be able to see if the oil is coming from the airbox side or engine side of the carb or if it is coming from a seal where a shaft penetrates the carb body or something like that. Once you figure out how the oil is coming out of the carb you may be able to find the source easier. Another thought is to clean the carb & airbox really well and disconnect the breather tube where it enters the airbox. In that case, if the oil still drips from the carb it can't be coming from the breather. The risk is if the breather is spitting a lot of oil, the back of the engine may get nasty, but at least you'll know for sure where the oil is coming from. Ed
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- TeK9iNe
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Re: Oil dripping from carburettor
09 Jul 2010 18:10
All goo info so far... follow the oil trail.
Oil should be at half the height of the glass, not over/@ the top, that IS too much, and can blow out of the breather.
GL.
Oil should be at half the height of the glass, not over/@ the top, that IS too much, and can blow out of the breather.
GL.

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79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors

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- keith1
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Re: Oil dripping from carburettor
09 Jul 2010 19:43
TeK9iNe wrote:
yep!!
All goo info so far... follow the oil trail.
Oil should be at half the height of the glass, not over/@ the top, that IS too much, and can blow out of the breather.
GL.
yep!!
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- ELCouz
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Re: Oil dripping from carburettor
10 Jul 2010 16:05 - 10 Jul 2010 16:06All goo info so far... follow the oil trail.
Oil should be at half the height of the glass, not over/@ the top, that IS too much, and can blow out of the breather.
GL.
you are right... I've removed nearly a pint of oil to make the oil level between the 2 marks.
EDIT: it is very hard to check the level while keeping the 500 pounds bike centered on its wheel :S ... previous owner broke the center stand frame attachment.
Now no more oil leaks.
Can somebody explain me how does it work. I mean how so little amount overfill can make the oil spit from the breather and increase the overall oil pressure?
Best regards,
laurent
1982 KZ810-R1 GPZ with hindle 4-into-1 pipe
Last edit: 10 Jul 2010 16:06 by ELCouz.
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- Patton
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Re: Oil dripping from carburettor
10 Jul 2010 18:20
ELCouz wrote:
Click here > For The Easy Way
Good Fortune!
...is very hard to check the level while keeping the 500 pounds bike centered on its wheel :S ... previous owner broke the center stand frame attachment....
Click here > For The Easy Way
Good Fortune!

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- ELCouz
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Re: Oil dripping from carburettor
11 Jul 2010 13:03
thanks Patton for the tool never though of that!
regards,
laurent
regards,
laurent
1982 KZ810-R1 GPZ with hindle 4-into-1 pipe
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