Yamaha - Coil, Source - 4BC-85512-00-00

2004 pw80 weak spark to no spark condition and it would not run. when the bike was brought to me to repair some one had already tried the ignition coil and the spark plug wire and cap. proceeded to trouble shoot and found out that the source coil ohms measured 142ohms but should be in the 220-240ohm range. ordered and received new source coil, measured the ohms of it and it read 242ohms perfect!!! one thing though the new source coil did not come with the leads soldered on so i had to reuse the existing leads and solder them to the new coil (do not overheat the coil terminals when soldering).reassembled the bike and the 1st kick it fired right up and running great.

thank you,

Was not getting any spark on a 2005 Yamaha pw80. So I tested the cdi and the primary coil and they passed the ohms test. The source coil didn't pass. It was reading low, So I changed it out and it fired right up. It was not to difficult if you have an ohm meter and a service manual to tell you what the ohm readings are.