If I remove a damaged piston from a 1000 engine can I re-use the rings on a new piston (providing the tolerances etc are ok)? I ask because I read that due to the Nikasil bore it would be difficult to get new rings to seat properly. The crosshatching is clearly visible on the cylinder in question hence wondering if it would be better to use the rings that were in the engine. The piston was damaged to to valve contact.
You better do some checking around before you hone cylinders. Better off installing new rings without the hone unless you got the right hone and the knowhow. The chrome type cylinder coatings can be very thin and if you f*ck em its all over.
Rings can get brittle with age. Not sure it would be a good idea to reuse. I'd be worried about a broken ring down the road if they survived the reinstall.
I did exactly what you are talking about after piston had too much slap and badly damaged crown from hitting the valves.
I used all the same parts (rings/oil rings etc), replacing only the piston.
My bike makes 190 on the dyno and I have done about 20-25 track days since then without a problem.
I did a rebuild of my motor 2 years ago, measured the rings they were within specs, so put it all back together, it chugged oil like a Russian chugs vodka... so took it all apart again and replaced the rings.
so if you ask me I would replace all rings now.