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Posted by Troll
 - February 08, 2013, 18:15:54 PM

Ok, so if this were mine, I'll tell you where I'd go first...Put it all back together, with the fresh oil, etc, but take off the rad cap. Take a health sniff of the air on the top of the rad right after you take off the cap...if you smell exhaust... Start it up and let it run on a fast idle and see if it blows water out of the radiator right away...Have you been adding coolant? Next thing would be a cylinder leak down check. You said you ordered an adapter for your compression gauge, so can you connect that adapter to a constant compressed air source? If you can get the engine on compression on the rear cyl. and put air in the in the plug hole, any compression loss will show up as bubbles in the radiator..On the bright side...800s appear to be all the same, so no hard to find parts or even a good complete engine. How many miles on this critter, anyway?

Posted by John Hopkins
 - February 08, 2013, 15:44:33 PM

Ok I think you have serious problems..water should not get into the oil..but that milky stuff sounds like oil and water..couple that with the sparkplug problem and it sounds at least like a cylinder head gasket, probably a warped head and maybe even a crack...But whatever it is you need the engine out and stripped and that means either spend a lot of money or do a lot of work..or strip the bike and sell it as parts on ebay..for the water to mix with the oil it could have gone past the piston rings and down into the sump..

John.

Posted by ginmocny
 - February 08, 2013, 14:20:22 PM

Oki I have strip off my bike. Took carb out, cleaned and changed o-rings in inlet manifold ( <--- probably wrong spelling). Took clutch cover off,  replaced friction plates and gasket. Found some milky gunk inside clutch cover <---WTF!!!. Job for tomorrow put the carb back, put some fresh oil, oil filter and cooling liquid. I didn't have chance to check compression yet, I'm waiting for adapter for my compression tester. My question: Is it possible that clutch cover gasket been leaking and water from water pump has been slowly mixing water with oil and that could cause my problem with spark plug?

Posted by ginmocny
 - February 07, 2013, 15:07:57 PM

Thx guys for your word of advice. Will check compression and air leak tomorrow after work. I'll post what I found.

Posted by Troll
 - February 07, 2013, 13:52:08 PM

I have a 1500, and my spark plugs last over 50,000 miles.  If you are having an issue with the rear plug, only there are several possible causes. I saw it mentioned that the valve lash adjustment should be checked, as well as the compression...both good places to start. I believe the lash adjustment interval is 15,000 miles. Since there is only one carb feeding both cylinders, it seems unlikely that the carb would be at fault, but an intake leak could effect one cylinder. How many miles on this bike?

Posted by John Hopkins
 - February 07, 2013, 12:45:46 PM

I would not advise you to change or adjust anything until you have a better idea of the cause..Take a look on ebay for an engine compression tester..they don't cost very much..

Then disconnect the four plug caps and one plug from each cylinder, connect the compression tester to the front cylinder first..then turn the engine over for about five seconds..record the reading..150 psi would be nice..now test the rear cylinder..what you need is roughly the same compression in both cylinders, if the rear cylinder is a lot lower than the front I'm afraid you have a serious engine fault..if they are both the same you have an easy carburetta fault.

John.

Posted by Drift1
 - February 07, 2013, 05:13:29 AM

Ginmocny,let me be the first to tell ya,I'm by far any type of mc mechanic.Have you checked your valves or adjusted them at all?If you don't have the repair book (bible) as a lot of us refer to it as,you can also see this done on YouTube.Wish I could help you out further,but I'm positive someone on the forum would be able to help you out more.I'll try to find out more info for you as well,my man.

Posted by ginmocny
 - February 07, 2013, 04:36:26 AM

Hi everyone. It's a first time for me to write something on the forum, I feel like virgin :). I live in UK and I'm proud owner of Drifter 800 from 1999. Recently I'm having trouble with me bike. Every  7 - 10 days I need to replace spark plug in the rear cylinder :(. Burnt spark plugs are black and bit oily. I have checked oil level and is +/- this same level. Some times here is some smoke coming out from the exhaust. When the spark plug is on his last legs the engine start misfiring and you cant ride without choke. When engine is cold all working like should, soon it's get warmer there is strange knocking coming out from engine. I can feel it rather the hear it. When I accelerating this knocking is more feelable. No knocking when gearbox is in neutral. Any ideas where and what to check??? Regards

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