Mountain Max Vs. RX-1 Mountain?

Backwoods M Max

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Mar 31, 2011
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I'm not looking to start a 2 stroke vs 4 stroke debate here. Last spring when I bought my Mountain Max the dealer also had a 2004 rx-1 mountain with similar miles for about $2k more. As they were in about the same condition I went with the mountain max because of what I had read about the SX 700 engine being bullet proof and the endurance people have been able to go between overhauls. This was my first yamaha sled but I have been running yamaha outboards for years and have always been impressed with the quality.

The other day I stumbled on the rx-1 listing on powersports network and the weight is a considerable 86 lbs heavier. The MM700 is already heavier than the current run of mountain sleds like the ski doo summit at 464 lbs or the polaris dragon.

I'm just wondering the "what if" I had gone with the RX-1? how is the 4 stoke motor? I know that it wont have the snappy throttle of a 2 stroke, but does the sled feel stronger seat of the pants? Is that 86lb weight penalty made up by the extra 300 cc and cylinder or is it just a nose diving bucket of bricks any way you want to slice it?

My MM700 went on a diet this past spring before I put it in storage. It has a mbrp can dropping 12 lbs and I stripped the skid and put on ice scratchers dropping about 8lbs from the skid. Mine is a strange beast as it has reverse and electric start from the factory, so the weight shed should get it down to non reverse pull start fighting weight or slightly less. When this track is shot I'll rebuild the skid with mountain performance 151" light weight rails and go from there.

Praying for snow in NH, it's been a long summer and I just found a back country trail around the corner from my house I can't wait to ride
 

having owned both, the mtn max is far more enjoyable than the rx. i still have the mtn max, rx is gone. if your trail riding only, a properly setup rx would be the way to go. not my style of riding. theres one experienced opinion between the two. if your off trail riding, hands down, the mtn max is much more enjoyable.
 
The one time I rode an RX-1 it was back to back with my 156" but otherwise stock MM700. The RX-1 had the 16 wide 151 IIRC, and would do straight climbs a little better than my 700 and out in the open screwing around it would be close to equal as far as the fun factor is concerned. Boondocking/sidehilling in the trees the MM700 was significantly better. I would definitely rather ride an RX-1 on the trail though.
 
Between those two, I would have gone with the MM too.

I was faced with the same decision when I bought my Viper. I knew I was buying a new sled for sure, and they were coming out with the RX-1 that year. I chose the Viper simply because it is usually a bad idea to buy the first year of something completely new...usually some bugs in them that need worked out. The weight was also too much for my taste.

On the other hand though, I now wonder what would've happened if I had bought the RX-1. If I had that sled it would probably have a turbo sitting on it by now, having been paid off for so long.
Probably be a bad idea for me to have a turbo'd sled anyway... ;)!
 
Backwoods M Max said:
When this track is shot I'll rebuild the skid with mountain performance 151" light weight rails and go from there.

Not to get off topic but when that time comes dont discount Iceage... ordered me a set of rails and they are more then helpfull to what ever plans or dimensions you may want.
Never had a MM but I do have a Viper and once owned a RX-1... never looked back or wondered what if. 2 smokers all the way.
 
mod-it said:
On the other hand though, I now wonder what would've happened if I had bought the RX-1. If I had that sled it would probably have a turbo sitting on it by now, having been paid off for so long.
Probably be a bad idea for me to have a turbo'd sled anyway... ;)!

I did think about that as well. Knowing how funny a turbocharged carburetor'd engine can be I figured that it would have been the most temperamental bastard on the snow.
 
i bought a 4 stroke nytro in 2010 and i have a modded mountain max with 153 track and i still prefer the 2 stroke over the 4 stroke .
 


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