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.
Check that all your ground wires are on steel. And all the bullet connectors are pushed all the way in. I take it you checked for spark after you put motor back in and now you have no spark. Correct? Was motor completely out of frame?
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.
x2 on what rainman said i ground down the p/c to bare steel where my ground wire hits frame
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.
Mine would spark periodically.Even fired up initially then died and would have weak/no spark.Not saying that's your problem for sure but something to check.Do you run the head stay mounts?
No sir mine doesn't have them
May want to try running a ground wire from the head stay part of the head to the frame and see what happens.I found the head stay is a much better ground than the front mounts to engine.
You mean run a wire from the head itself to the.frame?
You mean run a wire from the head itself to the.frame?
Yep,use a fairly heavy gauge wire to a good clean ground location on the frame and then a nut and bolt through the head stay to hold the other end.
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.
Good to hear ya got it figured out.