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yz250 wont start

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Old 05-17-2008
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lol i just tried it with the other plug and it has full spark so im assuming its the plug because when i pulled it, it was pretty burnt. im gunna do a full service on it just to be safe. ill let you know tommorow!
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2001 Yamaha Blaster 200
Full Trinity Racing Exhaust, boyesen power reeds, lone star racing 2+ A arms, chrome grab bar, Aftermarket Halogen lights, Pro Taper SE handlebars, Pro Taper Grips, G - Force Axle, Uni Air Filter, race cut fenders, air box lid removed, Tusk Tether killswitch, Kenda Klaw Xc's on douglas .160 rims(back), Maxxis Razr II's on douglas .125 rims(front), Bling Star H-Bomb bumper, Gun Metal Black Painted frame!

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1999 Yamaha YZ250
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  #12 (permalink)  
Old 05-20-2008
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well i would bet your pilot jet is clogged if its not a fouled plug.
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Old 05-20-2008
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Quote:
Originally Posted by dan151 View Post
no i just checked it by pulling the plug and hooking it back into the cord, touched it to a bolt and gave it a kick and no spark. fouled plug?
If you have no spark ya gotta get that happening before anything else. Try a new plug and see if you have spark while holding it to ground, it can be hard to see the spark if your trying to turn it over and hold the plug at the same time...lol Still no spark it could be your spark plug cap. I had a no start on my yz250 and it was the cap. Also it could be your CDI unit, check your connections carefully cause a CDI is expensive.

Another thing I've seen is the magneto shears off the key thats holds it on the crankshaft, so when your trying to start it the magneto is just dragging along, no spark. This sucks cause the cause of this is worn out wobbling crankshaft bearings.

Hope that helps Sorry missed that last post So you have good spark then, does it run now...
Last edited by Grasshopper; 05-20-2008 at 10:12 PM.
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