just bought a 90 model softail, been sitting for a few months and the guy I got it from said it was blowing smoke from the crankcase breather hose on idle but ok while riding, got it home put a battery in and cranked it over, nearly fired but noticed a great pool of oil on the ground coming from the crankcase breather hose, was pumping it out from the moment I hit the starter, ol mate told me he thought it might have a cracked ring on the back pot and he thought it might be pressurizing the bottom end, it turns over fine and from the brief time I had it running there were no bad noises I could hear, topped up the dry oil tank and cranked again, this time no oil came out but you could feel air being forced out the breather hose, bike has a super G carb so the head breathers are blocked off and it has fairly high klms

So my question is could it be just be the oil pump ball and seat jammed like evos do, or might it be far more serious, heads , barrells off deal ?, I'm hoping for the least expensive way out here

Thoughts gents ????

Check the ball first and move from there. By the sounds of it the bike was wet sumping on start due to oil bypassing the ball and seat. If it is that then cheap and easy fix. However if there is a lot of back pressure then probably rings. And having the breathers blocked would add to the issue of crank case pressure.

When winding over oil is drawn from the tank to lube the parts. If it doesn't fire not enough pressure is created in the cases to push the oil back to the tank, so it exits via the most convenient route, which is out the breather.

Smoke and atomised oil are different things. Place a paper towel over the end of the pipe when blowing "smoke" to check is if isn't oil.

not a un common problem with evos if thay sit for a while , as has been said I would fill oil tank get running it will spew a bit out put crank hose into a container
my evo spewed about a 1ltr out after running for a few minites turn off let sit for ten than repeat if still coming out pull the ball and filter out give it a clean and put it back in ,it may have gunk on it than repeat .even with 50 % leakage past the rings you would have minor oil mist as dutch said oil bypass the ball and spring then end up in the sump aka wet sumping

+2

ok, so i replaced the check valve ball and spring, also the relief valve slider and spring and replaced the tappet screen filter and spring just for good measure, so after fitting new plugs ( old ones were black but not wet with oil, so i assume the rings are ok ) and other assorted farting around the bike now runs and isn't gushing oil out the crankcase breather any longer ( one can only assume it is now circulating oil around the motor as intended ) but i now have another question, is it normal to be able to feel air being pulsed out of the crankcase breather hose whilst running ?

Hi,
The oil puking out is normal for Evo engines, especially if they have been sitting around for a while. Just clean up and ride!

Air is supposed to be coming out of the hose...that's how the cases vent, so it's normal. You may even get oil mist out of t as well, that's aso normal.

+1 to what turbo tussuck said

pulsing air is normal  and it will have a fine oil mist. the harder you work the motor (or if its buggered), the greater the oil mist. The only way i overcame it leaving a mess was to fit a breather catch can.