Hmm.. 447 fan? they make that? I do know they make 377 , 440 , 503 rotax fan cooled ones.. but not sure about 447?? but I would guess 0 to 50 MPH both sleds would be probably pretty much even side by side, but then that 470 liquid would pull away from fan cooled sleds...... top speed for fan cooled is about 80 on good conditions ... and 470 should be near 90 ish. again on good conditions as well.
I know what the 447 is. its basically a Safari Scout with a 440cc rotax fan motor. My buddy's dad had one years ago and we used it all the time. it was a nice sled but not fast at all, MIGHT do 70mph. the mx will absolutely destroy it, not even worth the effort.
A forum community dedicated to snowmobile owners and enthusiasts. Come join the discussion about performance, racing, troubleshooting, trails, maintenance, riding tips, modifications, classifieds, gear, and more!