My son has been riding for 7 years now, and we've been through a series of bikes ... now riding a YZ250F. I've learned more and more about basic maintenance (oil, coolant, filters, brakes, etc.) over those years, but would hate to add up all the money I've spent having someone else do the engine work. I'd love to learn from someone/something other than youtube videos. Is there any place, or any one in the Bay Area, that teaches a course on dirt bike maintenance? Or does anyone know of anybody who is interested in teaching ... would be great for me, and my son, to learn to do more and more ourselves. Thx.