86 250 fourtrax - weak spark - Page 6 - Honda ATV Forum
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post #51 of 54 (permalink) Old 11-22-2010, 09:01 PM
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well, im going to look for a coil to borrow. i dont want to buy one just yet as ive already gone way over-budget on this machine.
if and when i do find the problem ill be sure to post back on what it was. i wouldnt want anyone else to spend what i did and NOT resolve the problem.
thanks again Helmut for all your help, patience, and prompt replies. it was much appreceiated..
Yes, I understand, no one wants to buy something they don't need. Good luck and I wish I could have helped you more.

Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
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post #52 of 54 (permalink) Old 12-09-2010, 01:43 PM Thread Starter
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Well, i got brave enough and tore into it again. took the chain and everything out, then reinstalled it. and this time it was dead on! so, i put it all back together again. and it runs beautifully! no misfires, smooth and steady and all kinds of power! although the is still a little hesitation there, but with the way it runs now im sure i can live with it! I just stopped in to let you know that with your guidence i finally got this running the way a Honda should! now with that outta the way i can finally start on my 1964 Honda CA77. thanks again!
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post #53 of 54 (permalink) Old 12-09-2010, 01:47 PM
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Well, i got brave enough and tore into it again. took the chain and everything out, then reinstalled it. and this time it was dead on! so, i put it all back together again. and it runs beautifully! no misfires, smooth and steady and all kinds of power! although the is still a little hesitation there, but with the way it runs now im sure i can live with it! I just stopped in to let you know that with your guidence i finally got this running the way a Honda should! now with that outta the way i can finally start on my 1964 Honda CA77. thanks again!
That's great, I'm glad you got it fixed!!!

Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
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post #54 of 54 (permalink) Old 03-22-2011, 04:15 PM
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hey everyone,
i have a weak spark on my 86 trx 250 fourtrax. i have changed the stator and flywheel as well as the pulse generator along with a new plug.....still weak. ive checked the resistance of the primary side of the ignition coil and its showing me 0.4 - 0.5 ohm. the service book however states resistance should be 0.16 - 0.2 ohm. could this be the cause of the weak spark?
thanks to everyone in advance..
Just a heads up... (If you're still interested...) I have an 84 tRX 200 that had the same problem and the cause was a faulty ignition switch. Wear and tear I guess, but I just left the key to the 'on' position (to prevent any conflicting signals to system) and then snipped the 2 'on' wires running to the switch and soldered them together. Awesome spark resulted.

It's worth checking, just for fun...
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