I have a 1999 Yamaha Warrior that refuses to start. I have checked every electrical connection. I can find no loose or frayed wires. The battery is fine, because the headlights work, and the starter will turn over. I have done numerous spark tests, but it just won't spark. Not even a weak spark. I have a brand new spark plug, ordered a new ignition coil, and even a brand new CDI. I just dumped over $300 into this quad, and I have eliminated every possibility (I think). But nothing I've done has worked. I have read my Clymer's manual a dozen times. If any of you good people know of something I missed, PLEASE, PLEASE, PLEASE help me out. Thanks a lot in advance.

 

What about the lead wire to the plug? Have you checked for continuity?

 

Well, I used a multitester to check it for the proper resistance, and it was good. And like a sucker, I ordered a new coil anyway, but it didn't work anyway.

 

Just something very simple... and I know that you probably checked it but...... heck I have done almost the same thing...... is the switch on the handle bar on.... or could it be shorted out??? just a thought. I know I have been towed home befor when my quad died and wouldn't start only to discover that I had bumped the switch ....

just a thought....

 

(FOREMANes is right; don't overlook the kill switch! Been there, done that.)

The CDI can go out, just like that, POOF!

A good dealer shop can actually save you money in cases like this, because they have the test equipment/substitute components to avoid buying unnecessary items (like the coil).

If you've chased the wiring in your manual and have all the continuity/hot connections/grounds you should, the ignition sensor pickup trigger and CDI can be checked by your shop.

I remember the bad old days when you had points and "condensers!" Less efficient, sure; but, the average shade-tree mechanic could work on 'em, test 'em, diagnose 'em, and fix 'em!

Tree Farmer

 

I wish! The switch is not shorted, because the starter won't crank unless it's on. Of course, the starter does work, it just won't make a spark to save it's life.

 

Have you tried to pop start it?

 

on the warrior I owned and the one my friend owns it won't crank if the key is not on... but will if the switch on the left side of the handle bars is in the off position the machine will crank just not fire......

 

i dont know too much about this thing but somethin like this was happein to my friends bike and it was the fuse

 

This is a long shot, but maybe it's in the key switch. I accidently hooked up a key switch for an 88 Warrior on my 87 and it did the exact thing you just described.