I have a stock 2000 Yamaha Warrior 350XM. When I purchased this quad it was extraordinarily "clean" for 20 yrs. After replacement of junk eBay carb with OEM Makuni. And eBay Stator it runs great. You could visibly see orange RTV on Head Seal as if recently rebuilt. Awesome right? Well yea, except she leaks oil from somewhere. Pictures included. 1st. Shows suspected area of leak. 2nd shows where it tends to pool. 3rd shows where it runs. Any ideas? And how difficult is it to simply replace head gasket seals? I do have Clymer Manuel but I'd like some real world info thanks.