550 or

I just bought this bike, it seems to be very low hours, looks brand new and ran fine for two days. cranks on second kick. I changed the oil, changed the coolant, rode it, and it started cutting out really bad. it bogged and died, when I tried to recrank it I didnt get a full kick on accident and...

Hi guys, I had a quick test ride of the 550 and 650, but there was not a 450 to test on the same day, but I have tested the 450 before. These are all 05 bikes. I found the 550 really goes and I felt the gravity push as the blood went to the back of my head. It felt like it just takes off...