Question about 1985 Suzuki XN 85 Turbo

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Xn 85 fouling spark plugs

I have just managed to get my XN running after approx 10 yrs in bits ( stripped by many different owners ) and I have a continual problem of fouling number one spark plug. It runs for about 10kms ( 6miles) then drops one (number 1) cylinder. Any thoughts?

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I have a xn 85 model 86 and it was in a garash for a many years so the rubber of the valve seal are wet and no stop the oil, in my case was the 3rd cilinder i change the injector and continued leak the 3rd. when i change the seals tha problem sold good.......................have a good repaire.

Posted on Jan 06, 2009

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Check the compression on #1 and possibly a leaky #1 injector. What fouling, I'm guessing carbon(black plug). If it's oil you will need to do a leak down compression check this will tell you if it's rings or valves. If you suspect a leaky injector (as I do) swap it with #4 (30 min job) and see if #4 plug becomes fouled

Posted on Nov 20, 2008

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