I will be taking the Ace to the dealer for the 100 hour service in few days and I am building a list of things that I want checked out. Two weeks ago Greybeard and One-Shot were at my house for a few days of riding. They both brought their RZRs. When it was 45 degrees or colder, my Ace would hardly start. It would turn over easily. I would crank on it 5-10 seconds and then give the starter a brief rest. Sometime it took four of five of those cycles for the Ace to start. The RZR 570 and the RZR 900 would fire right up in the cold weather. The coldest day was around 35 and I thought I was going to have to push the Ace into the garage and warm it up with a heater before it would start. I would turn the key and wait until the fuel pump cycled before I tried to start it. Does anyone have any ideas about why this happens?