I tore in a old drag racing 250r bottom end today and found that it use to be ran on methanol because the crank area had some corrosion on the aluminum. Is this a problem? It could be cleaned up when I bead blast it but it will still have little pits all in it. The bearing races are still in great shape plus the case saver mounts are still in tact so I would like to save it if I could. Also, I found that the shift forks are showing some wear but the gears look in great shape even where the forks ride in the gears. I know I need to replace the forks but can I get away without changing the gears they ride in or will it just turn my new forks like the ones I replaced? I've had this problem in older Rs and it usually shows wear in the gears also but this tranny doesn't.