2 2-stroke questions: What does thick smoke coming from the muffler mean and how do you stretch fuel while riding?

[Deliveryfoot]

I maybe pushed the motor too hard and the muffler started sounding louder and was smoking by the end of a long ride.

As for making your fuel last as long as possible, aside from the obvious "Turn off the engine" and "pedal", what speed saves the most fuel? Does it not matter if i go fast or slow?

 

[DistantWolrld101]

For making fuel last longer, get the bike up to speed gradually then let it coast as far as you can and keep doing this.

 

[GreasyChris]

Sounds like the muffler came loose. The excessive smoke is your fuel oil mix and your carb jetting. You're safe running a 32:1 gas to oil ratio and then jet your carb to that mix.

 

[CrazyDan]

My fuel economy jumped when I got a shift kit. I get up to speed and shift up to the next gear and keep the rpms low. The higher the rpms the more fuel you use.