K
We've been throwing around lightened RX-1's (~530lbs) in the Cascades since 03. Still have 9 running strong. Well, I'm ready for a new sled. I love my motor: feels like high 140's hp with our mods, super reliable, still out runs new 800's on the road. I have no interest in going back to a 2-stroke or spending $13K on a new sled. I have yet to see a new naturally aspirated 4-stroke that can touch our sleds in the mountains. My opinion. the low hp nytro motor was a bad move for Yami. So I decided to mate my favorite motor with what looks to be the lightest, most similar handling chassis out there. Plus, with lots of blown pro motors there's lots of cheap Pro chassis's. Mine was $2.5k. (My son just picked up a 2014 Pro 155 chassis to mod for $1300). I yanked my ole trusty sled's engine this past summer (over 12k miles on it but still running strong), and stuffed it in a 2016 RMK 155. The install was amazingly simple, even for a low-tech guy like me. A little grinding, some simple engine mounts from 3/8 6061 plate, basic wire feed welding on the stock under-tunnel exhaust. Engine looks more at home in the Pro chassis than in the one ton. Lots of space for crap. I'm at 469lbs, no gas. The stock RMK was 461lbs w/oil, no gas. A true Pro chassis will be lighter. I have it on the snow. It's running strong. Had to tighten the track ridiculous tight to not ratchet. Very happy so far. Feels like a Pro with great motor. Just need some real snow in the Cascades!!