... PrimoRevera Pro Clutch and primary chain.

...It has been slowly leaking from the bottom of my primary and I asked them to check it out while on the dyno. ...about a 100 mile trip....I have never had the primary off. Oil is all over the rear swingarm and tire. ... I think it's the tranny because of the vibration that soon followed, and the motor oil level seemed fine every time I checked it.

At one of the stops someone suggested that his bike had the mainshaft seal go out and leak profusely from the primary.

My friend had some Syn 3 in his hard bags so I put some in the tranny just to be safe and get it home. The gears seam a little ruff, and it seems to vibrate a little now.

Does this sound like mainshaft seal to any of you? Is this something that I should attempt to fix my self? ...
Thanks for any help.

No direct experience with Confederate but am assuming that the design of the shaft and trans on yours is about the same as HD--assuming you have left-side drive. If not, this probably won't apply.

In addition to the seal for the starter shaft, the seal around the shifter shaft on Dynas, and the o-ring for the engine case, there are four seals having to do with the transmission output shaft.

There is a big seal in the inner primary cover. There is a big seal in the trans case. There is a quad seal (like a flat o-ring) that goes on the mainshaft behind the pulley nut. Then there is a little seal that goes between the concentric output shafts.

Plan to replace all of the seals and gaskets having to do with the primary.

You must remove the inner primary for all of them, which means you must pull the clutch and compensator assemblies. For the seal on the trans and the little seal on the shaft and the quad seal, you must also remove the trans pulley.

All of the other seals are easy to figure out, but to change the little one you must pull the inner race off of that shaft, pick out the little seal, install that seal using something that will recess it properly, press the inner race back on so that it has the proper (.10" I think) clearance between it and the pulley splines, then re-install the pulley. As long as you're in there, replace the seal in the trans case too. You can do it after you get the pulley off.

Before you do anything, see which fluid is getting low. It ain't the engine, so don't worry about that. If the primary gets low, but the trans stays up, then the leak is probably one of the seals in the inner primary, the filler plug, or a gasket. If the trans fluid goes down, it's the mainshaft seal in the trans, the quad seal, or that little seal above that I don't know the name of. Also, look behind the primary from below. If the leak seems to be on the outside (Driver's left) of the trans pulley, it's probably coming from the little seal described just above. If it's trans fluid rather than primary fluid, it the little one for sure. If it's coming from the inside (driver's right) edge of the pulley, it may be the mainshaft seal on the trans.

These leaks are pretty rare, I think, but can be caused by drive belt too tight, primary chain too tight, trans pulley not tightened enough, improper assembly, or who knows.

Either way, unless you feel like buying a couple big sockets, an impact gun, some black RTV, a piece of plastic pipe or a seal installer, and the James tools to pull the inner race and remove the trans pulley, I'd take it to the dealer.

This is a no-brainer with the proper tools, and impossible without.

 

Yeah it is pretty much the same as most of the evo's my friends have but it is a right side drive.

I know for a fact it is the tranny fluid that was pouring out of there.

I have an impact but none of the other stuff.

Thanks for your help.

I am still undecided about dealing with this situation my self.

 

trans seals

Barry gave you a real good description of the seals that need changing. I can add one more thing. To get the trans sprocket hub nut off, you need a REAL deep socket. Don't forget the trans shaft sticks out maybe 4", I don't remember for sure how much. I made myself a custom socket to span that distance, or you will have to buy a special tool to do it. Even though it's a pain in the ass, I say go for it. You'll save big bucks, you know the job is right, and you'll gain that much more insight into your bike. But get that socket first!

 

Well you have swayed my decision.

I am going to do it my self. I hope I can run to the wealth of knowledge
on this board if/when I run into trouble.

Also is there any kind of standard reference that I can get for general info and diagrams on evo's that you might recomend or know of?

My bike being what it is, it's been somewhat of a shore to get any true specs on it.

Thanks again fellers.

 

trans shaft sticks out 4 1/4

 

Ok check this out!

I go get my bike and ride it home from my friends, leaking the whole way of course. I pop the primary cover off and see the primo/river clutch and belt drive. Oil all over the place. I changed the tranny fluid and re-tightened everything wiped everything down.

I cleaned the whole inside of the primary very good and took it for a ride with the primary cover off so I could see where it was leaking.

NO LEAK?

None, zip, zilch!
WTF? I was damn sure I would be pulling that whole inner primary off to change that seal. There are vent holes(pics attached) on the motor side of the inner primary. I assume to get air to the primary belt.

Could something have been loose on the tranny and it was leaking fluid and I fixed it when I tightened everything from the tranny fluid change?
The only thing I can think of is that it sucked into those holes and leaked out the holes on the left side of the primary.

I even got on it a little bit. No leak.
When we were in Laughlin it was leaking very, very badly.