I have been running an 800 AVS for years. For you application a little AVS2 would be fine. My personal experience with Demon was from 2009. 825 mighty demon. When I got it is was brand new and had metal slivers throughout the carb. All the air bleeds slots were striped like a ham fisted monkey installed them. After cleaning it out, I really liked the carb, remember this was quite a long time ago and quality control could have improved but I personally would not get another Demon carb.