84 v-65 ran great 2 months ago runs now but badly

[6sprint3]

I started my bike for the first time in about 2 months. It took a long time to get it running but it finally started but ran like it had no power. I pulled plug wires off one at a time and you could tell it was firing on all four.
It ran fine the last time I rode it.
Any one have some idea what would be wrong

[Jerry G Turner]

Change out the gas and run some carb cleaner through it. Slow speed jets get clogged easily.