Polaris has 8, Cat has 13, and Doo has 6. 121 isn't going anywhere. The reason Yamaha is going away from 121 is because their suspensions are so bad, they need something longer to bridge the bumps. Sad but true. The choices are more limited nowadays anyways as far as engine sizes go, that it makes less and less 121's. Cat will have a few more 121's sometime soon with their 600 DI. No, the 600 2-smoke from Cat is NOT going anywhere either, they just couldn't include a 600 2-smoker to pass the 2012 EPA regulations. That will put them over 15 easily.
All I referenced to Yam was 144 tipped seemed too long when introduced on XTX but now seems ok. You guys need to think outside the box & your brand. I'm on a Yam now had all brands in the past & consider all OEM sleds when I read them up & buy. I do favor 4s over 2s & happy to see a lot more 4s from AC but I also like etek too. Sooooooo back to the future of 121 tracks all brands? All brand 2012 lines ups showing a lot less 121s simple as that. A 1 year trend or is the market going to 128 & greater? Not sure Cat has 121 this year that I saw in American Snomo Mag buyers guide. Just bringing 2012 track lengths to your attention & track lengths are changing all brands & that is fact regardless of what sled I ride.