RX-1 Problem on Vacation!

On the first day of a five-day vacation at a cabin, 1/4 mile into my first ride and with hundreds of miles of sled trails at hand, my 2004 RX-1 stopped working.

I started the sled up soon after we got to the cabin. It warmed up and rode normally for about 1/4 mile to a narrow creek/outflow with about 3 inches of water over pavement. I crossed pretty slowly, and then the throttle became non responsive. The idle is at 3k rpm and pulsating like on a rev limiter. The rpm doesn't respond to throttle or choke, but will reward me with a huge firey backfire if I give it throttle. It smells rich. No change after letting it run for a while and trying again the next day. Maybe I got some electrics (or distributor) wet? I'm down to the on-board toolkit, and I can't see any electronics due to a stubborn screw.

Any ideas? I'm hoping it's something stupid. The sled has only 900 miles on it, including my only ~200 sled miles. I have plenty of experience with motorcycles and cars, but I've never seen anything quite like this problem. BTW, it's a 2004 mountain, bone stock. I'll try to attach a video to a reply below.

Thanks in advance!

You guys probably hit the nail on the head. I gave it a 2" rise prior to the trip. I read that 2" was safe without cable extensions, and I saw slack, but I must have messed something up. I'll troubleshoot at daylight. Thanks!

You guys are all awesome. It is a TORS issue. In case anyone finds this post in the future, the 2004 RX1 Mountain, at least, can't handle a 2" rise without a longer cable. I made every adjustment I could think of. Shockers - you can't believe everything you read on the internet. I made an order for the cable from the 2005. Meanwhile, the TORS bypass you mentioned worked well. I was able to make it move, at least, but trail riding is not possible unless I only turn slightly left. I should have brought the old, shorter bolts, at least. Anyway, I was able to get out a little with skins and a jeep. And the override will let me load the sled much more easily.

Cheers and happy New Year!