Honda crf250r and 450r 09 and newer fuel injected bikes have always had an issue with gas making its way to the crankcase and filling the crankcase with gas. With this problem, it will dilute the oil and cause your crank bearings, cylinder wall, cam, lifters, and seals to fail prematurely, costing you lots of money and down time from riding. Some guys and dealers have tried to fix the problem with expensive injectors and fuel pumps and still had the same results. The gas is getting to the oil while the bike is off and not while it's running like you may have read on the forums. When you shut your bike off and the timing of the fuel injection is right " or in a bad spot for shutting it off " the injector will hang open and let the gas siphon very slowly thru your injector down the Intake past the Intake valves past the piston and right into the oil. With the kit that I put together it will take care of this problem and keep you riding instead of wrenching. https://www.ebay.com/itm/182682508469