New to VMX in general, rebuilding an old farm bike PE250

[suda695]

Afternoon all!

I got put onto this forum after I put up an ad on gumtree. I've recently aquired an old work bike from my parents farm. I heard that these bikes can be pretty unreliable in terms of the electrical side of it so that is the part I've been focusing on trying to get it going. At this point I've done all I can. The spark plug is sparking now though which im happy about however there is still no firing in the cylinder. We've got air and fuel going into the carby, and the carby itself is clean as a whistle. All jets are clear. I'll post up some pics too for you to have a look at too...how do I go about that??

There's a lot more work that needs to be done to it but I thought getting it running would be a good place to start.

Cheers,

Ben

[Rossvickicampbell]

Mr SUda695 - welcome - the PE's were a good bike so best of luck with getting it going.  As far as posting pics - do a search on this forum there are a number of threads on how to go about it - basically need to host on something else like photobucket etc.

cheers

Rossco

[frostype400]

If you have spark it should fire if you pour a little fuel down the plug hole then put the plug in kick it again it should fire for a couple seconds at least maybe your timing is way out

[suda695]

Yeah I just had another go at it. It scared the crap out of me! Ran for a few seconds an karked it again, havent been able to get it going since. Speaking of timing, one of the parts I took a look at was the stator motor/magneto. The holes to mount it to the case have been lengthened and theres a chance I havent mounted it exactly in the same place. Can this affect timing? Is there markings to line up to? How are some other ways of checking timing in these old suzukis?

Also this might be a stupid question but is the muffler neccessary to run the engine in terms of back pressure? As I have that off at the moment.

[sleepy]

Those holes in the stator will effect the timing but not enough to stop it starting and the muffler won't stop it starting either.  Most likely just not enough fuel getting in or to much.
Is the choke circuit on the carb clear and working correctly? Remove the choke and make sure the plunger is moving freely and the hole in the bottom is clean. Also in the float bowl the choke pulls fuel in through a small jet in the bottom of a passage in the float bowl.

[suda695]

When I had the carby apart I poured fuel through all the orifices to make sure they were clear, choke included. However the choke plunger has some massive resistance to moving. Feels like metal on metal grinding in there, not good. How can this affect the amount of fuel in there? If there's too much fuel in there at the moment should I get an air hose into the cylinder to disperse it a bit?

[LWC82PE]

Download manuals here

https://onedrive.live.com/?id=407D7EF0965D3991!1086&cid=407D7EF0965D3991

[suda695]

Some pics:

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[suda695]

...That went well

[suda695]

Let's try this again

[suda695]

That file dump is insane! Cheers mate!

[80-85 husky]

LW is the guru of PE's , now that he is on your case, your plain sailing to vintage riding....

[Oldfart]

check to see if the little jet in a cavity at bottom of carb  ( pilot ) is not blocked. remove with a small fit flat blade screw driver.
Please do-not belt the side of your fly wheel  to remove it, as it will crack you magnets. Make yourself up a puller and use 5mm x 50mm screws 3 of  allen head screws. this will save you a lot of money down the path.
From what I see you have a 1980 model
Cheers

[suda695]

Yeah I heard there was a few PE nuts trawling this forum 

In regards to the jet I have removed that during my cleaning of the carby and the jet itself was clean too. I might have a read of some of the material before I get back into it but for now I'm calling it a night.
Thanks for the year too I wasnt too sure on that..

[Doc]

Welcome suda..this won't help your starting issue but it looks to me the cylinder head is on backwards.