Oil in the stator 85r

[riverrat]

Well my bike is giving me fits. Long story. Thought it was the electronics, so I bought a new stator, coil, and cdi box. Still having trouble. Pulled the cover for the stator off and found oil in there. I pull it off often because for some reason, I get water in there while ice racing, still haven't found the cause of that either. Put this time there was oil in there and water from a 2 second ride. The bike did backfire severly a few times while trying to figure out the electrical problems. So between not getting it running right, and finding oil, i Tore it apart, but didn't really find anything wrong. Can't figure out how water is getting into the stator, or how oil got in there. Or why the dam thing won't run. There was oil dripping down on the skid plate as well, but i think that was coming from the kick start seal. My plans to magna flux the cases, and reassemble with new seals. Probably going to put a stroker crank in there as well. There was also a lot of oil in the exhaust flange pipe area, but not any accumulation in the crank case. My plug was black as well, but that might have beefrom it misfiring. So many clues i am so dam confused. I can figure out other peoples problems so easy, but my own baffle me.

[atc500x]

crankshaft seal,or the o-ring on the balancer flange/cover

[1984 honda 200s]

+1 crank shaft seal, same thing happend to my 200s, oil got in and shorted out the stator coil. replaced seal and coil, runs like new.

[riverrat]

There is so much to the story. For the last two race season, I would get water in there, and dry it out, and it would be fine. Then when I went to iciest, it started acting like there was water in it, but there was none. It would run fine for 20-40 laps, then it would start breaking up like it was rich. There was no water or oil in there.

Came home and ran it for two days, no problems, then it just died completely, it s wierd how it died too, sounded like a miss, then just nothing. I figured either the coil or cdi box died since it had no spark (it is possible the plug was wet and I wasn't seeing the spark) so I ordered a cdi box and coil from rmstator, and changed them one at a time, and it didn't work, then it did, but it ran like crap. I tried swapping stators too, all the while there was no oil in there. Then on the last test run, and a bunch of bad backfires, it was running terrible so I opened it up once again only to find the oil. With the black plug and oil just about everywhere, I decideded to tear it apart.

The counter balance holder is an ESR unit with a new o-ring on it. The crankshaft seal was completely dry, did not look like oil was leaking for it or the counter shaft holder, the oil was just pooled in the bottom of the stator area. Like a thimble full.

I trouble shoot stuff for a living and I know how to follow clues and deduce things from logic, but none of this makes sense at all to me.

[riverrat]

I also don't type well on an iPad, lol

[RubberSalt]

Thats a blown seal, no doubt. You may have a leak int he gasket, letting ice get in. or it's really humid in there and condensating.

[RoscoW]

I could be wrong but if it's motor oil on that side the only place it could come from is the counter balancer bearing holder. The main crank seal wouldn't have motor oil present on the other side only residual two stroke oil built up in the crankcase (unless there's a bigger problem). Determining which oil it is should start you down the right path.

[riverrat]

I could be wrong but if it's motor oil on that side the only place it could come from is the counter balancer bearing holder. The main crank seal wouldn't have motor oil present on the other side only residual two stroke oil built up in the crankcase (unless there's a bigger problem). Determining which oil it is should start you down the right path.

That's some good advice there. I have no way of testing it, but my first impressions was that it was 2cycle oil. The 2cycle oil that reaches that side of the bearing is residual oil that seeps down the oil hole. It collects oil dripping down from the cylinder if I am correct. That oil is dark like motor oil, but it had a blue tint to it, and had no clutch shavings like the tranny fluid on the other side. Just had put a new clutch in it.

Yet, there wasn't a drop of oil on the seal (was trying to follow the trail). Any oil accumulated would have been from trying to start it a bunch of times, and a 2 min ride, becaue i had just put the cover on to ride. Unless it blew through the seal from the nasty kick backs and backfires that sound like gun shots, straight through without leaving a trail.

I would almost expect it judging by the sounds of those back fires. In all this I still haven't figured out what the root problem is.

[riverrat]

Thats a blown seal, no doubt. You may have a leak int he gasket, letting ice get in. or it's really humid in there and condensating.

I gave up on the gasket idea after I tried to seal it like 7 times. And now that i got the motor apart, I can't see where it could possibly be coming from. That is why I am going to have the cases magnafluxed. I ho pe i dont need new cases. It can't be humidity because I tried it out with a heater before sealing it.

[bkm]

The water is probably getting inside from the rubber plug that the stator wires go through. Does ice pile up on top of the cover while racing? If there is a slit in the rubber wire cover it will find its way in through there.

[riverrat]

The water is probably getting inside from the rubber plug that the stator wires go through. Does ice pile up on top of the cover while racing? If there is a slit in the rubber wire cover it will find its way in through there.

I doubt it. I sealed the original stator with red ATF silicone, and shrink tubing, then I did the same thing on the new stator. The ice doesn't normally pile up on it, I am always looking it trying to figure it out. But the wetter the snow, the quicker it gets wet in there.

[Dirtcrasher]

Water always gets in that plug for sure.......... Or a chain cracks the case. There seems to be no neat clean way to seal stator grommets at the top but I've seen dozens or more leak right there.

When is the last time it had the main bearings changed? Any play up/down or side/side when hot??

Also the left side crank seal (on the liquid R motors) gets set in 4 or 5mm deeper than flush, or it rides on the taper of the crank shaft and leaks...............

[riverrat]

Ok, after much thinking, and talking to my friend who works on these part time in his own shop, I think it is the seal. This is what was happening, and I believe this explains all the problems I am having. First off, most likely both seals are gone. So the seal on the tranny side is sucking in oil and fouling the plug, and that is creating a bunch of circumstances that is confusing me. Then the seal on the stator side is goen, and actually creating a vacum in the stator area which is sucking in water through any pinhole it can find in the stator gasket, and wire seal. When the trike back fired, because the plug was fouled, and possible it was running lean due to a finally blown seal, it pushed the oil back into the stator area.

So I think both seals are gone. Anyway, the cases are going to be magnafluxed, and all new seals and bearings. My friend is going to weld up the broken area by the clutch shaft/case saver. And then I will polish them up and start another motor build. This time I might be going BIG. going to take a while, gots lots of things I am going to do to the bike this year, and when I am done it should be a top show case build, and fast as hell.

[younganreckless]

Is this finished?

[pantera1975]

Is this finished?

we will all remember this when you need help

[riverrat]

Completely redoing the motor, polish and everything, gonna take some time as I am not in a rush.

[younganreckless]

we will all remember this when you need help

Huh? I just wanted to kno if he got it running???

[riverrat]

Huh? I just wanted to kno if he got it running???

I understood you. Idk what he is taking about.

[younganreckless]

Wat r u thinking about doing upgrade wise? 310? Stroked?

[riverrat]

I was just going to do that, but I want to try a power valve. So the 310 kit is for sale. Its got 12 gallons of race gas through it, and 5 gallons of pump gas. I have both domes for it. In prefect shape.
I probably will go a little bigger, and a small stroke.

[atv innovations]

Just a heads up for the water problem before you race try spraying your stator with WD40. Back in the day after we got done washing our bikes and they would not start we would pop off the sator cover only to find water in there. A shot of WD and it would fire right up!

[younganreckless]

How much for the 310? Is it a bolt up to the 85 250r no modificatiOns