Hi, New member here, been browsing the forums for a couple of months now as a guest reading up on the threads, especially considering I bough a used 04 YZ450 and I about had a heart attack when it boiled over on me ! (one reason Im installing boyesen water pump kit) I have done a ton of searching and I am still slightly confused on one thing... how to do you check bearings in regards to the water pump seal replacement? Also to check the balancer shaft bearings do you insert the impeller shaft into it and try to wiggle it up and down? As far as the decompression plug, do you simply unscrew bolt, remove old, use channel locks to press new one in and tighten bolt, or am I missing something? Thank you!