Always use stabil when storing for more than 30 days just to ensure it will not gunk anything up. It is only like 1 oz for 5 gallons of gas. I use the stabil 360 and it has worked well. Use it in all my small engines.
One time I worked on a neighbors lawn mower that had never used stabil. Fault was it would not start. Took the carb off and found out that the jets were clogged and the red gunk that you get when fuel sits too long was all in the carb. Cleaned it all up put it back together and it ran well.
Straight out of the Indian Riders manual:
Add fresh fuel to fill the fuel tank and add fuel stabilizer. Do not
Ride the motorcycle or start and run the engine for 15 minutes in a
well ventilated area to distribute the stabilizer throughout the fuel