I have a 2005 Yamaha Grizzly 125 Automatic. It set for over a year. I cleaned the carburetor. When I go to start it I choke it, shake it from side to side while pushing the start button. This is the only way it will start. Once it is warmed up, I do not have to shake it from side to side while pressing the start botton to start it. I took it to the local Yamaha dealer and had it serviced and checked. They could not figure it out. Please tell me someone has some idea!