Puking Oil

Hi Gang,

Since I am a new owner of an old Husky, I have a question for the more "mature" and experienced vintage owners. I recently had my '84 WR250 engine completely rebuilt (bored, new top end, new crank, all new bearings/seals/gaskets, etc. The carb was disassembled and correct jets installed and it runs great. No fouled plugs, pulls hard at slow speeds and revs-out without sputtering. At my rebuilders recommendation I am using a 40:1 premix with Honda brand synthetic oil and regular grade pump gas. I just finished the break in period so I've not been running it hard. I've been doing a lot of slower trail riding with my son, no higher than 3rd gear and have generally been taking it pretty easy.

My issue is that it pukes heavy amounts of black unburnt premix oil (at least that's what I assume it is) from the head flange and the pipe-to-silencer connection. At the head, the goo is coming out of the pipe where it slides over the head flange. The head flange gasket is new as are the pipe springs but when I mounted the pipe over the flange the fit seemed loose to me. At the silencer, there is an old o-ring that probably should be replaced.

My question is is this puking goo normal for my year Husky? Years ago a friend had a KDX that did the same thing no matter what he tried but my Suzuki never did. Been away from from 2-strokes too long and never had a Husky so I'm scratching my head. Thank, Tom

what slide you running? should be 3.0 or 3.5

The slide is a 2.0, the carb is a 38mm Mikuni. Maybe this will help too:
Needle=6F16, Needle Jet=P-6, Main Jet=430, Pilot Jet=45.

Whaddya think?

luvvy- see elsewhere on this site the jetting specs for different models, i don't have the stock '84 but should be easy enough to obtain. definitely change to 3.0 slide, clip in middle and play with air screw (1.5-2.0 turns out)

Thanks LL, I'll try it. So back to my original question; are these older engines oil pukers as originally jetted from factory? Is your experience that jetting changes were needed to eliminate the oil discharge, to get them to run better, or both? Thanks again for your advice,
Tom

nope, if jetted correctly they're nice and clean but remember they came from the factory waaaay rich (so knuckle heads wouldn't blow 'em up). I found some specs for stock '84 wr:
400 main
6dh3 needle w/clip in #4 position
2.5 slide