82 250 wll not fire

Hey guys I have an 82 250 xc that I got as a complete project with a stuck top end and no spark. This is my first husky after many years of wanting one. I've put a fresh topend and bought a motoplat off ebay that I sent to Vance Smith to have rebuilt,I have spark,compression,and feeding fuel manuelly, the bike has no fire, not even a sputter or backfire.Could the ignition be 180 out or just way out of time? Any thoughts would help greatly thanx.

I would start with the basics. Verify the timing is set correctly. Is the plug wet after trying to start? Make sure fuel is getting to the carb. Drop the float bowl and turn on the gas.
Timing could be off, but not 180 out.
You should be using a dial indicator to locate the piston at the proper position before top dead center.
Then its just a matter of inserting a pin through the hole in the flywheel and locating the aligning hole in the stator plate.
When the pin is going through the flywheel and into the stator plate, with the piston at the proper position, the timing is set.
Remove the flywheel, tighten the stator screws and re-install the flywheel.
Make sure to double check the timing, things can slip.
Also, make sure you rotate the motor in the direction it normally turns (use the kick starter to see), when you bring the piston up into the timing position.
This will take the slack out of the drive train and timing will be more accurate.
Hope this helps, Ron

if you cantact me at 720-841-1399 i can walk you through timing ect.

after our phone conversation...
seems like your trying to install a interenal flywheel stator from a bike that had the flywheel on the other side.
seems like its 180 off...
id install a correct fly wheel and stator, with correct upper coil...and ill bet she will fire right up...
if it sparks, and adjusting the timing everyway but loose,..and then dragging the bike down the street and it still wont light up.
that says wrong parts...lol

http://www.yourhusky.com/files/86-2t-shop-manual.pdf

that manual shows the timming set up for the CR interenal flywheel stator set up...

Thanx for the info Chuck, I did't relize there were that many motoplats out there.Is there any way to identify the different ignitions or flywheels?

your issue sounds like you got a motoplat from a bike that had the flywheel on the other side, likely a Cagiva 125GS..
the correct flywheel and stator will fix your problem.

Maybe this is a silly idea but what if you don't put in the half round key. With the kind of timing light you attach to a battery or plug into the outlet you should be able to figure out how to position it. Sure I have heard of some brand x having that key shear and timing move but other applications (like the drive side of the standard shift ones if I recall) don't have keys.

Fran

OK I took the key way out and flipped the rotor 180 and still nothing, not even a sputter. My brother says it looks like a weak spark-he would like to see and hear it snap when it sparks. is this not possible with a motoplat?

The spark is pretty feeble, I have one which came with a pvl system and it is pretty feeble too. That doesn't seem to matter for me on either my two stroke husky or my husky chain saw as long as there is a spark of any kind.

If the lower end gets full of too much fuel it won't work. If you take the plug out and put in a pencil eraser end (might need a less than new one) and find the bottom of the stroke leave it there overnight with the plug out and it might dry out assuming it isn't so flooded that it needs turned rotated while in a position with the plug out and down. I have an air chuck with about a 12 inch copper tube on it which can be threaded in through the plug hole and then through the transfer port to air stuff out if in a hurry. It has been the chain saw misbehaving lately not the bike. it too has a feeble spark Just something to consider.

If you can get a timing light like I described use the pencil and some chalk and figure out about where in the stroke the spark is snapping. Without the plug in you can get it spinning pretty well.