Very very good Weber engine. I started this engine between -20C to -28C without problem. The kkk turbo is perfect and you just have to let your sled idling for a minute or 2 to let the turbo cool down. I average 19 mpg at cruise speed. I own SB turbo 2009.
You can obtain more info on www.polarisfiles.com for that sled. You will find a FAQ with full of info. On that site and on CMIQ web site, you will also find info on Yayou/Desperado's ECU reflash. A lot of FST owners applied his upgrade and is highly recommended to gain more potential from that superb sled.