what most people dont take into account, in my opinion, is that harley davidson's technology has allowed their engines to go for WELL over 100,000 miles. my mom has a vrod and it has 50,000 and my dad has a cruiser and it has a lot of miles also. its the same pistons and technology and everything else in the buell engines, i rolled over 13000 just the other day, and will be doing a thorough 10000 mile service on my own. THEN waaaaaay later down the road if i do run into problems ill just do a rebuild, have the block remachined and new internals and be good to go for another round.....believe me, these engines last a long time, its a fact