87 honda trx 125 wiring diagram

SOURCE: 1985 Honda trx 125 no power at coil wires & no

I have a 85 trx 125 it ran great, parked it then the kids went to start it and it wouldn't start. I checked for spark, has it but seems weak to me, changed plug and still same problem. Any ideas? Coil?

SOURCE: 85 Honda trx 125 ran great when parked, kids tried

Start with a fresh spark plug. Part of the spark may be traveling to ground via the carbon deposit on the ceramic electrode insulator. Drain the carb; condensation in the gas tank may have built up in the carb float bowl. Engines don't run well with water as fuel. While servicing the bike, clean the air filter and lube the cables.