Yamaha Powersport Forums banner

weak spark

  1. YZ-F & YZ
    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...