I have a 2008 WR450F that was bought new in 2014. The engine oil and filter is changed every other ride (trail rides) or every 200-300 miles at times because the bike is tagged and used for some dual sport riding. Of course during oil changes as expected I would noticed the normal wear and tear/clutch residue that discolors the oil but also leaves a film inside the engine and can be noticed at the oil filter pocket area. The oil is changed while hot but also some cold oil changes have been made. Question: Has anyone every tried using an internal engine cleaner like Seafoam through their engine before oil change? I was thinking of adding a few oz's of Seafoam start the engine and let it idle until hot and then drain the oil change filter etc. Thoughts?