I just got a barely used 2003 WR450. My engine is quite noisy compared to a buddy's identical bike. After investigating at TT, I have decided I should remove the clutch cover, clutch, water pump and clutch housing so I can check the primary nut gear torque. The manual designates using a clutch removal tool when removing the clutch boss. It appears that after removing the pressure plate and springs, the boss and plates can be removed as an assembly. Is is necessary to have the removal tool for this particular job? If so, can a tool that will work be made or is a significant amount of clamping force required to hold the plates inside the boss?