Seems like timing belts cost about $60. for K&N belts. Add to that the cost of labor from your dealer. I'm not a wrench guy, but seems like a number of folks have tackled the job themselves with success. I'm sure someone will chime in here shortly with their response...
I just did it couple weeks ago. Never saw a wing until I bought this in May.
Good instructions here with pics if you look. I found them and printed them and took it out to the garage.
cost: $55 for belts from NAPA
time: about 4 hours, took my time. It is important to do it right so time isn't a factor here.
the only thing I would say is get down eye level when you mark the alignment and do it with a straight edge.
I was a little nervous the whole time but when I was done, had to say it was not hard.
I change the timing belts on client's trikes based on years vs. miles. No matter how well something is made, it doesn't last forever. I have a 1993 Wing and the timing belts were changed at 58,000+ miles.