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TOPIC: Cylinder 2 misfire / oil leak on plug

Cylinder 2 misfire / oil leak on plug 11 Jul 2019 12:11 #807379

  • RobertKZ650
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Hello everyone,

I own a 1979 Kawasaki KZ650SR. I bought this bike in Nov. 2018. The bike has been taken care of for the most part as it is in good condition for being 40 years old. However, as the title states, I realized the bike was lacking power and noticed the exhaust pipe from the 2nd cylinder was not hot due to oil on the plug.

I've noticed oil leaking from the engine. I was hoping it would only be the head gasket but if that was the case, wouldn't all cylinders be having issues?

Other than the occasion lack of power, sometimes the bike feels like it's firing on all cylinders, as there's a significant increase in torque, but the pipe will still be cold. It idols fine at start up but will stall if I don't keep on the gas while riding (I've already adjusted the idol control). I have the original owner's manual and have read it from front to back (twice) and am still unsure. I'm hoping someone will be familiar with this issue so I'm not doing guesswork.

Thank you for taking the time to read this and all replies are appreciated,
Rob

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Last edit: by RobertKZ650. Reason: Typo

Cylinder 2 misfire / oil leak on plug 11 Jul 2019 13:45 #807383

  • Scirocco
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Do you have check #2 cyl. has a spark on the spark plug?
The oil you see on the spark plug could be unburnd fuel cause by a broken spark plug.
Change/Switch #2 and #3 spark plugs and look if the issue following now on #3 cylinder.

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Cylinder 2 misfire / oil leak on plug 11 Jul 2019 13:46 #807384

  • 650ed
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If the oil leak is around the area where the tachometer cable attaches to the engine it can be easily fixed be replacing a couple pieces in that attachment collar. This is a common problem, but fortunately it's easy and inexpensive to fix.

Regarding the oil on the spark plug - what spark plugs are you using? Also, are you positive that the carbs are squeaky clean and properly adjusted? Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)

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Cylinder 2 misfire / oil leak on plug 11 Jul 2019 18:03 #807399

  • hardrockminer
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If you have oil on a plug something is leaking internally. Have you done a compression check?
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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