Just though I would report on the condition of my 570 after a strip down after 35000 ks and 550 hours. Apart from the counter shaft wear the rest would have done at least another 300 may be 500 hours. Remember the bike has not been flogged and used for Adventure riding. Am replacing some parts for the reasons listed.
The Bore has no wear, measured it in 6 places and is in the lower range of the specs. piston is worn 0.03mm bore to piston clearance is 0.08 so will put another piston in. (Prox, They are cheap)
New timing chain, sounded like a good idea.
Countershaft, various clips, seals and gaskets.
All bearings look great, the oil has always come out clean.
Gear box looks great, shift forks no wear.
Not going to even look at the valves, the clearances are still in specification. and my budget, the bank (and the wife) wont let me have them.
The only problem was splitting the cases. the upper case dowel had slight corrosion. luckily the case has some tabs so gentle tapping and lifting the opposite side of the case sorted it.
For Adventure riding, in my opinion this one very strong engine that will last the distance.
Will post some pictures I took about an hour ago.
Cheers