I have a higher hour bike (estimated at 300 hours+) thats needed some maintenance. Ive been doing weekend rides that have the bike one for about 18 hours in 2 days, and itll drink about 1/4 quart of oil in those two days. Is it possible that the oil is blowing by the rings and burning? Im assuming at this point i need to start thinking about new piston and rings at minimum. the engines also very vibby and loud. Sounds like theres metal rattling somewhere, but i cant figure out where. I have been riding her really hard and i checked the valves just 1 ride ago, they were getting close to being out of spec, so i decided to get one more ride before i fully adjust them. is it characteristic of the WR450 to have a loud rattling motor?