I just got a boyesen Supercooler for my '05 YZ450 supermoto bike I'm making street legal. I've got the stock water pump cover off, and the clutch cover off also.. How can I get the stock water pump impeller off to install the new Boyesen unit? Is it required to completely remove the right side case to hold the back of the water pump gear with a wrench to remove the impeller? Or can I somehow hold the clutch pack to keep the engine from rotating as I remove the impeller? What are the re-TQ specs when I put the new impeller on? Oh wait, I can probably take off the left side engine cover for the stator, and hold the crankshaft from turning with a wrench on that side huh? When I got my clutch cover off, I saw I had an aftermarket SuteRacing slipper clutch..