And if you have headlights , please turn them on. It may help a little even in the day time.

I put a thumb throttle off of a 400 ex on mine and it helped with the angle
of the lever.The most improvement was when i took the carb apart and took the spring where it attaches to the throttle shaft and moved it to the other tab. You have to grind or cut a notch in the other tab.
do a search on yfz central and it will show you how to disassemble.
After doing this I could ride all day and never feel it.