Hello, new to forum and I just bought my first sled and would like to get it ship shape. Anyway its the 600 twin LE and has 2500mi on it and seems in good condition. The rear end is soft and seems to have lost its rebound. Do I just need to replace the rear shock and wondering where to get parts and what this all entails. I weigh 240, more in winter and would like a stiffer / higher ride if possible.