Just wanted to pass along what I just found out. I bought a Sparks Polaris XP4 1000 clutch kit and had to modify the primary rooster arm weights. I read the instructions and it said to use a least one washer while using the red bolt. I used 2 thin washers and thought that would be fine. Apparently not. I took it apart to install the new clutch kit I received with the Turbo kit I’m installing and found out the red bolts were hitting the clutch housing. Great, I wonder if that’s why I was still breaking belts. Anyways I would run at least one thick washer with red bolt to make sure it does not hit the clutch housing. FYI 🙂