1988 XC250 revival 2016

Trust me if the clutch side seal was leaking you would know it, It would be fogging the whole neighbor hood out and your trans fluid level would not be the same level either and your muffler would be getting a oil bath.
How long did the bike sit before you got it up and running ? it could have a bunch of crappy sludge in the bottom end and then when it gets warm it mix's up and looks milky grey color and then it will settle out later after it cools .

When your clutch side seal is leaky it draws oil in from the transmission into the cylinder area and try's to get com-busted , I don't know how much air it would let in the trans.

My bike will push some oil up into the clear breather hose & it looks aerated as Kyle talked about. I think He is correct that it's just the clutch spinning in the oil causing this. My bike has always done this. The degree it does it is dependent on oil level & oil type.

I have heard that before too OBDude, I had a real job a while ago (one that you have a boss) and I serviced big electric motors on top of mixing tanks with food grade oil and the oil would get aerated full of tiny bubbles. These motors ran 24-7 so apparently it does'nt hurt performance.

Nah, never bothered me or my bike. Just spits a lil oil occasionally out the hose.

Good to know guys!

I'm sure if it were burning off the 4t motorcycle oil I have in there I'd smell it.

The cases were split so the bottom end should be as clean as it was when I assembled it. I didn't clean the gear box as much though, just drained the oil out. I did put a quart in and run it just to change it out to the proper amount in an attempt to get any debris outta the box though.

No more than 10psi. My pressure rig setup isn't air tight so I couldn't do a pressure hold test but I'll be messing with that here soon.

It will be bit before I can get more pics up, currently at work using their wifi, my router died yesterday.

When I fist assembled my 400 I used a straight 30 oil and it did the same, the clutch didn't like it much either.

So long time no update! Been working some serious hours to try and get the custom shop caught up, summer is the busy season for sure.

Anyhow, ZERO complaints on the husky so far, starts first kick and got the bottom end sealed up tight finally. No other leaks that I can detect. Quick question though, what spark plug do you guys like to run? I went with the Autolite recommended in the manual since I'm all stock. Wasn't as easily obtainable locally as I'd have thought a Autolite would be but very, very cheap.

I made a youtube channel for y'all, been wanting to make one for a while now just haven't had the chance! lets just hope my iPhone shoots audio and video well enough to make it worth while.

I have the first video up now, its of the original bottom end bearing, the double one, stator side iirc. Worth the watch, you'll see why it got binned for sure!

Heres the link to my channel, about to go do a cold start video on it. https://www.youtube.com/channel/UCZF9-2y6GChIOQKA_AKCoLg
Chilly morning this morning and it slept outside last night due to clear weather and laziness. Either way, cold start at about 55f.

Just wanted to thank EVERYONE who helped out, even if it was just a two or three word comment. Without this community I'd likely have gotten frustrated and sold the bike before I could have ridden it once simply because of a lack of good, correct information!

Your videos look fine. The bike sounds good. You need to build a roof over that bike.

ngk b8es, or nippon denso equivalent

I use the 8 as well

Me too

It usually sleeps in my walk in basement. I do need a shed or garage quite badly!

So the plugs I've run in basically every snowmobile then! Does the resistor make a difference? I have a few br8es laying around.

Mails in!

will interesting to see how this one measures up to your old one as well

Can't wait to tear into it!

Here are the two side by side, the piston that came out of it is marked 66.44, standard.

A couple more.....

i take it you will be modifying the intake skirt? should be a winner?

You bet I will!