I have 22 inch tires in the rear with a 13/44 sprockets, if I change the sprockets to stock and the wheel size would this help top end and acceleration.

Also what type of reeds are a good replacement?
Does advancing the timing help in performance? Any performance tips would be greatly appreciated.

 

Drop a tooth or two on the back, then try it. If that ain't fast enough go up one on the front. I've got a Quadzilla and I run two different set-ups for speed: 13/42 for smaller area riding and 15/38 for wide open roads and sand. Your tire size is the same as mine so it will be alright.