Or just go to your dealer and buy the Viper Torque Limiter kit. It's part # SMA-ENGIN-ST-AY. It's in the Yamaha 2011 snowmobile accessory catalog. This kit also has all the same parts as the entire kit for SRX dog bone mount.
The directions are non existent that come with the kit. If you search around here on TY, there are some posts that will help installation, but aren't perfect. I just sort of had to wing it. The kit mounts on the other side of plate behind the clutch.