I know the maintenance schedule of my bike with reguards to oil changes. But I have been reading here and other places that some guys change oil/trans and primary every time they put their bike up for winter storage. I use to do this with my metric, when I only had one lot of oil but the Harley has three lots. If you're gonna change every fall, what's the point of the schedule. Trans and primary are 10,000 & 20,000 respectivily. Any thoughts.