How many miles on the bike? You may get comments from other well meaning people that you should do the cam chain and guides, cylinder head refurbish with all new new guides and valve and rocker, etc. All of this can be very true depending upon mileage and intended usage. If you are going to ride cross country and want no troubles then, maybe yes. if you are going to use it like I do where I use it for my summer commuting with occasional adventures where I rarely get more than a couple of hundred miles from home, then you can be a little less demanding on overall condition. I replaced my cam chain and transmission and crank bearings last time I had it apart involuntarily for crankshaft failure due to the fact that it had 40,000 miles on it then. I also changed a couple of gear ratios then too, just beacause I was there and could easily at that time. If the crank had not failed I would still be riding it with no worries.