You're comparing a two stroke twin to a single, you can't do that. It's like comparing an apple to a bowling ball. On the Banshee you have a throttle to keep the r's up you don't need a heavy flywheel.
Boonman how many people have sent back their lightened flywheel's to you? I run a Gorr Port, with a single carb on DMC 916's with a -2 swinger. That's about as much low end as you're gonna get with a banshee. I've run both a lightened flywheel and a stocker, I currently have both to use so I can change them if I wanted. But there's no point in throwing on the stocker it's not nearly as good of a machine as with the lightened one. Take it into consideration I ride woods, trails, sand, hills...basically whatever is in my way I'll ride it. The lightened flywheel is by far better on the Banshee in all situations.