Yes you can do this on an n/a sled, however if you don't have the power to use the extra shifting of the clutches then it's of no benefit. If you have 24/50 gears you have an rtx or ltx? What's your top speed? Seems like 105 is the magic number on snow with stock gearing regardless of whose clutch kit, some slightly more some slightly less. So if you're not to that point where you stuck at around 105 then machining for more shift won't help in any way. Given your mods, in all honesty I don't see any reason for machining, there's guys on here with quite a lot of additional hp adding parts on top of what you have and on snow it seems like they're seeing 105-108. Another thing to remember is that when machining for more shift you're essentially trying to shift your clutches into overdrive which also takes a lot more power to obtain, more than what I feel an exhaust and airbox mod can achieve. One guy to talk to on this is Cannondale, I know he's tried different clutch setups as well as different gearing and if I remember correctly his consensus is that with taller gearing he wasn't really able to get much if any more top end but was able to do top speed more consistently. Since conditions greatly affect sleds if focus more on consistency than that 1 time a year where you hit a perfect trail and can get a big top speed number.