easy enough to do.. do any of the bike groups around here do Tech Days?
The club I belong to does, and we do everything from changing oil, valve adjustments, tire changes to transmission replacements. We have a LOT of old bikes still kicking it after 100 - 150,000 miles. A LOT of talent and information out there if you can find it.
Websites are a GREAT resource, if you want to do something to your bike, post what you want to do, and they'll reply with what they did, the mistakes they made, and usually the easiest solution.
I have 1500 miles to my 24000 mile service, so in about 3 weeks I'll be in my garage with my bike in pieces, and saving about $350 in the process!
Working on your own bike makes it MORE of your own bike. You tend to take more pride in it, and enjoy the ride even more then before.