Just got.my engine back on my 85 everything looked good.  Tried starting it no fire. A month ago it had a spark like a lightning bolt. Ive changed nothing what would cause this. Ive checked all wiring ,new plugs ,. Help im ready to send this pile over a mountain.  Its driving me crazy.

Make sure the mount to engine contact points are clean as its the ground path.Had the same issue with my 500 when I PC,d the mounting brackets.Had to buff them down to bare metal at the contact points.

Thanks fellas.  Yes I had previously took the engine out to rebuild the top end well I sent the jug to a guy who destroyed it. But before all that I completely repainted the frame reinstalled the engine and had a heck of a spark. On the painted frame. Now the engine was leaking around the head and had no compression.  I took the engine back out. Had to buy another jug cause the previous one was destroyed, took to a reputable machine shop. Got it all fixed. Engine is ready. Heres the crazy part. Reinstalled the engine just like the time before ( mind you I changed nothing) and now I have no spark.  If it was a grounding issue why did it fire before and not now.

No sir mine doesn't have them

You mean run a wire from the head itself to the.frame?

Well guys a feel like an idiot. I forgot to mention the day I was working on it I drove from Tennessee after a long weekend.  That being said I took a few days away from the 250 to relax and think it over.  Got home today and realized when I installed tge exhaust I had unplugged one of the wires from the coil. Just goes to show you need a clear mind and and patience to not overlook the little things. Thanks for all your help.