I'm stumped!
After being out of the dirtbike thing for 15 years I bought a 93 RM250 about a month ago. I got about ten minutes of ride time on it then bam no spark.
I replaced the Coil with a used one I bought on E-bay.
I put on a new stator coil, a new pulser coil. a new CDI box. I've checked all the wiring for shorts and for breaks, I'm pretty much stumped.
When kick the kickstarter with a multimeter on the wire from the CDI box (not the CDI wires that goes to ground) to the coil brings the voltage up to about 15 volts then slowly drains back down. If I keep kicking constantly it seems to go up and down between about 16 and 12 volts then slowly drains to 0 when I stop. I'm not sure if the voltage would stay the same or move if I was able to keep the engine rotating at a constant speed.
I have tried to measure voltage from the pulser coil but am unable get any voltage reading from either my old one or my new one on the bike. I can get the multimeter needle to move if I pass a stronger magnet past the pulser coil. The magnet on the rotor will stick to my screwdriver but isn't hugly powerful. I think it's OK because the magnet is about as strong as the one that is bolted to my Kart axle to measuer speed. I also don't think there is much a guy could do to break a rotor or wear out the magnet.
The only two things I think it could be are the rotor or possibly I bought a bad coil on ****. What do you guys think. (besides get rid of the POS and buy a new KTM 300 EXC)
After being out of the dirtbike thing for 15 years I bought a 93 RM250 about a month ago. I got about ten minutes of ride time on it then bam no spark.
I replaced the Coil with a used one I bought on E-bay.
I put on a new stator coil, a new pulser coil. a new CDI box. I've checked all the wiring for shorts and for breaks, I'm pretty much stumped.
When kick the kickstarter with a multimeter on the wire from the CDI box (not the CDI wires that goes to ground) to the coil brings the voltage up to about 15 volts then slowly drains back down. If I keep kicking constantly it seems to go up and down between about 16 and 12 volts then slowly drains to 0 when I stop. I'm not sure if the voltage would stay the same or move if I was able to keep the engine rotating at a constant speed.
I have tried to measure voltage from the pulser coil but am unable get any voltage reading from either my old one or my new one on the bike. I can get the multimeter needle to move if I pass a stronger magnet past the pulser coil. The magnet on the rotor will stick to my screwdriver but isn't hugly powerful. I think it's OK because the magnet is about as strong as the one that is bolted to my Kart axle to measuer speed. I also don't think there is much a guy could do to break a rotor or wear out the magnet.
The only two things I think it could be are the rotor or possibly I bought a bad coil on ****. What do you guys think. (besides get rid of the POS and buy a new KTM 300 EXC)