my 03 speedmaster has 80,000 miles. no major problems. spedo cable broke once. replaced battery twice. chain guard broke twice only replaced once. (who needs that thing anyway). Had clutch cable break but that was due to changing bars and had it in a bind. 4 sets of tires. chain and sprokets numerous times. Been running AMSOIL since the 2nd oil change. I use a cleanable UNI air filter. I run the cheapest gas i can find and ride the ****** out of it. that bike hasn't seen an easy day since it was broken in. Hands down the most dependable ride i have ever had.
