Hello, I have a Honda Dio that I have had for about 1 year, bought used. It has been great until recently.

It takes about 15-20 minutes to get it to start, and it frequently stalls, especially going up hills. Once it warms up I can start it reliably, but with full throttle the power fluctuates constantly... full power and then I lose almost all power, and it cycles back and forth like this. Backfires occasionally, but not that loud.

I changed the spark plug about 2 weeks ago and helped immensely, however, the problem has returned.

Two questions:

1. Does anyone have an idea of the problem?
2. Does anyone know a reliable place to go that has experience with 2 stroke engines, preferably Honda Dio engines?

Thanks

Jason