boiling gas

[MikeB]

I have noticed that I have more power at the beginning of the trail ride. I do long steep hill climbs and steep descents. On the descents the bike stalls and I have a hard time pop starting the bike. I noticed the power loss because I can do a wheelie when I first start off but by the end of the day it has no bottom end. I was wondering if I was boiling my gas. I just read about how pro riders put heat shielding on the bottom of their gas tanks. Has anyone had any problem with this or is it that I’m just weaker at the end of the ride and can’t do a wheelie. I weigh 220 and it may just be more than my bike can handle.

Any thoughts

MIKEB