I recently purchased a 91 yz 125 that appears to have been uncared for for some years. It started when i bought it but didnt run very well. I found silicone jamming the reeds open, exhaust unsealed from the barrel amongst many other minor faults. Ive sorted these problems and the bike now runs fine (although not very fast) for around 20 mins and then cuts out. There is only a very weak spark and i believe this could be the problem. The wiring had been redone with ultra thin cable so ive rewired the bike with the correct gauge wire. Ive tried a new plug, no difference.
Any suggestions of what to check? If there was a resistor for the spark plug where would that be? HT plug? Does anyone know what the resistance of the coil should be? Does anyone know how to test the stator?
Help would be greatly appreciated!!
Thanks, Harry.
Any suggestions of what to check? If there was a resistor for the spark plug where would that be? HT plug? Does anyone know what the resistance of the coil should be? Does anyone know how to test the stator?
Help would be greatly appreciated!!
Thanks, Harry.