KXstewart07
Member
- Mar 17, 2006
- 10
- 0
wcgyz said:i have had this same problem with my 87 yz 250. it kinda sounds like the crankcase is full of fuel thats why the plug gets wet. i had to turn the bike upside down like you would a pedal bike,pipe off plug out and kick the motor over by hand usually fuel will come out of exhaust port if this is the prob. also preheating the plug in the oven at 250 degrees will keep it running after you clear the crankcase.good luck. :ride:
Broken Spoke said:Just kidding, my wife's husband did that one time.
KXstewart07 said:If I sprayed starter fluid into the cylinder, shouldn't it start?
See the thing is... the cylinder has plenty of fuel in it, and when I take out the spark plug, it comes out looking brand new, yet very wet. I blow it off with a air compressor, put starter fluid in and kick and it doesn't start. I check for spark right after and before that and it still has a nice fat blue spark. Every now and then I'll get lucky and it will run for 5 seconds. I thought it was intermetent spark, so I replaced all of the electrical components. Through testing with a meter and visually, I am getting a nice strong spark.
Any ideas now? :(
Anyone know what the problem ended up being?I'm having same problem with my yamaha u try push starting it
no one has mentioned that blown crank seals can cause that problem.
Carb is new and I cleaned it twice. Bike only started once after I put new coil on it. I then replaced the main seals and it will not start.i don't think it's a fuel issue cause I tried putting fuel in the plug hole and nothing.the only thing that changed after the seals were changed was the wire harness from magneto was moved when I took the backing plate off to do the seals.it has spark but it may not be sparking in cylinder under pressureit only takes one little speck of junk in the carb to clog the pilot jet
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