i put a custom snorkel on my foreman 500.. thanks to mudlabspecialist for the recipe.. but after about 3weeks with the snorkel on, it started to feel alittle sluggish. I thought it was the snorkel restricting the air some. Didnt rejet quite yet. Pulled the stock spark arrestor off and the screen was 95% clogged with mud... hum, wonder how that got there? (thats what happens when you get a snorkel i guess?) but i cut the screen off and cleaned it up really good, so when i get home im goin to put it back on and see if that was the problem... i hope so! the bottom half of the power band was still there it was just the top half just seemed like it didnt want to rev... to me it sounds like this is goin to be the problem.... Later guys!!!