probasco96

I have a 1978 yamaha exciter, ITS A 2 STROKE, i'm currently restoring it after i pulled it out of the back of yard 1 year ago for SITTING 15 YEARS. after restoring the fuel lines, changing fluids and messing with some wires i have the back up on a stand so i can spin the strack while its on. it starts in two pulls and compression seems good. the 2 times i really had the gas nailed to about 20 mph for about 5 minutes i noticed a gas/oil/watery mix coming spitting from the pipe alot. then i noticed oil dripping from the pipe where it mounts to the engine. I am not sure what the problem is. if the rings were bad, the compression would be low however it is not. i was thinking it was just spitting grime out from sitting for so long but i dont know for sure. also i was informed from someone that the rings just might need to swell back up since they were sitting. i dont know for sure so please help!

BC_Dan

Welcome to the forum!

The oil/moisture is likely coming from the crankcase to the pipe and should go away when the engine is up to operating temperature. After sitting for so long, any oil that was in the crankcase and on the crank has settled to the bottom of the crankcase. When you started the sled, the air/fuel mix picks up that old oil as well as the new stuff. Oil doesn't burn very well, so it ends up going into the pipe. A cold pipe will cause the oil to condense on the walls, and then drip out. A hot pipe will keep the oil in the exhaust gasses and it exits with the exhaust.

I wouldn't worry too much unless it's doing it after you are up to operating temperature. Then there could be an oil injection problem with the pump, such as a mis-adjusted pump or one that is injecting too much oil. In that case, you would probably be fouling plugs, as well.

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2007 Dragon RMK 700 155", 2008 RMK 600 155", 2006 RMK 600 144", 95 Prowler 550 2-up, 1990 Indy 650, Really OLD AC Cheetah

http://www.avalanche.org/accidents.php

kccats

Welcome to the Snow Show! Did you clean the Carb!

probasco96

Ok thank you. If i keep starting it up and letting it run everyday will that help it for the long run? And yes i did clean the carb and i didnt touch the oil pump, i left that alone and only replaced the lines. Plugs are new so none are fouled. I just got worried after seeing a black spot about 2 feet in diameter under the pipe after running about 10 minutes while getting on the throtle.

BC_Dan

That's common. It will be worse if you start it up and run it every day, as the pipe doesn't get hot enough to keep the oil from condensing. You shut it down, the oil condenses. Next time you fire it up, the exhaust spits the oil out on the ground under the sled. It's the nature of 2-strokes. If I were to start my sled frequently, I would put a piece of tin under the exhaust so the oil would not get on the trailer or driveway.

__________________
2007 Dragon RMK 700 155", 2008 RMK 600 155", 2006 RMK 600 144", 95 Prowler 550 2-up, 1990 Indy 650, Really OLD AC Cheetah

http://www.avalanche.org/accidents.php

smokingcrater

if you haven't touched the carb, I would ABSOLUTELY go through that! Most of us do it every season in fact, I just did mine this last weekend.

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1) 2000 Arctic cat ZR 700, which now thinks it is a 2001 ZR 600 EFI APV w/136" ripsaw. (for sale!)
2) 1995 Yamaha VMAX 600, which now thinks it is a Polaris! (Polaris x10 suspension, Polaris P85 clutch) (for sale!)
3) 2004 Yamaha Warrior
4) 2006 Yamaha Nytro

kccats

Pay attention to the Pilot jet up the tube!

probasco96

Thanks now ill be able to focus on other things with it