Operation pore mans rebuild

orng blsm spcl

orng blsm spcl

Member
Got the engin put back togethere an put back in the Scout I should have it running again tomorrow.

Hey does anyone want to go up to the snow a week after Christmas. I needa go up to the snow
 
I double checked for rags an counted bolts. An this time I made shure there is an o ring at the end of the oil pick up tube to the oil pump I found out we didnt have one in it so my oil pump was sucking a little bit of air at times, that explains my crapy oil pressure I had I thought it was just anothere IH thing. Anyways it hurt my bearings a little but we caught it just intime otherwise it woulda just been a matter of time tell a rod started to go, I think this new engin is going to be a little better do to better oil pressure an a better carb
 
You know I have a small dirt I want to get running a little kx 80 but it wont run unless its on full choke and it only runs for a little bit like ten seconds. I pulled the carb apart an cleaned the jets but they must be clogged again, can you offer me any advise
 
orng blsm spcl said:
you know I have a small dirt I want to get running a little kx 80 but it wont run unless its on full choke and it only runs for a little bit like ten seconds. I pulled the carb apart an cleaned the jets but they must be clogged again, can you offer me any advise
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That sounds familiar. I once had a small two stroke that would do that. The piston and rings needed replacing and it was down on compression.
It had just enough compression to start, but once the cylinder warmed up for a few seconds it would increase in diameter enough to loose what little compression it had left.

I would suggest doing a warm and cold compression check.
 
Hey moose sorry I havnt been on. Your idea about the compresion could be right. It doesnt have great compression. And if im down by then id like to go to hollister with you. An rob I dont know where I want to go. I just wanna go to the snow evn for the day. I was thinking slick rock or something
 
Hey im going to weld up a tow bar an tow down my green Scout an let yall check it out. Or im going to see how my orang Scout does with my grampas full size trailer.
 
moose said:
that sounds familiar. I once had a small two stroke that would do that. The piston and rings needed replacing and it was down on compression.
It had just enough compression to start, but once the cylinder warmed up for a few seconds it would increase in diameter enough to loose what little compression it had left.

I would suggest doing a warm and cold compression check.
Click to expand...

This could definitly be what's happening. I agree you should do a warm/cold compression check to see if you have low compression. But if u cleaned out the carb before and it ran good for a while after that, then the carb is probably clogged up again. If the compression checks out ok I would clean that carb again. Take the carb apart and soak the parts for a while in some chemtool. Then spray the hell out of all the parts with carbclean. Make sure u can see a spot of light thru the jet. Then before u put the carb back on, thoroughly clean out the gas tank and replace the fuel filter if it has one. If you want I could give u a hand. Just let me know when you want to mess with it.
 
robscout80 said:
sounds good. Tomorrow at work I'll make sure I have that day off
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:cornut: awesome!

Yesterday I met some friends at metcalf. It was cold and foggy all day. It was neat blasting up hills you couldn't see the top of.
Kinda like a video game....
 
orng blsm spcl said:
you know I have a small dirt I want to get running a little kx 80 but it wont run unless its on full choke and it only runs for a little bit like ten seconds. I pulled the carb apart an cleaned the jets but they must be clogged again, can you offer me any advise
Click to expand...

Check the crank case seals to see if they are sucking air. If a 2 smoker cant pull good vacuume on the case it dosen't pull in fuel/air/oil mix
 
ducat said:
check the crank case seals to see if they are sucking air. If a 2 smoker cant pull good vacuume on the case it dosen't pull in fuel/air/oil mix
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My friend that got it befor me said he soaped up the case an it blew air I didnt think it was a big deal. I gues I needa pull it apart an put in a new seal.

As for hollister I wanna take a few friends of mine an play on the cource. An stuf watch other people do things. Ive got a winch an snatch block if I do manag to get in anytrouble
 
If you look at how a 2 stroke works, the case draws vacuume when the piston goes up which draws through the carbuerator filling the case with fuel/air. In a modern 2 stroke there are reed valves that only open in one direction that allow the mix into the case. When the piston starts it's downward travel it pressurizes the case filled with mix. At a point in its downward travel there is a port leading from the case to the combustion chamber that is opened and closed by being covered by the piston skirt and the piston rings act as the valve that keep the combustable mixture either in the case or allowing it to move to the combustion chamber. If the case has a crank seal leak what happens is that either the case opperates at a lower pressure due to combustable mix is leaving the process by being squeezed out the seal into the atmosphere, or that the case is not filled sufficiently due to low vacuume as it sucks in through the seal area unstead of through the carb. Or even both. At any rate the engine will opperate but acts like it's neutered.
 
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