CaveMike setting up wr450 for street legal, rally, baja. Him want find ways get wr hold more oil. Rekluse cover add 100cc more oil capacity. CaveMike see no toil oil cooler setup for 09 yz450f. Him know that will fit, but him want more ideas. No toil setup expensive too. Who make homemade oil cooler setup? No toil setup use new oil filter cover, and redirect oil out to cooler mounted on back of radiator. Has to be easy way to make own setup.