Jsud04 wrote on 08/13/14 at 17:27:09:I am perplexed ... If I did a new piston what's to say and old valve might not snap and drop into my cylinder....I mean where dose this perfectionists madness end...
Don't ask me.....I got a disease!
I tore my motor down when it had 1,262 miles on it because it was knocking. It turned out to be a loose flywheel nut - but I ended up installing new crank bearings, a new 95mm Wiseco piston, new valve seals, a Stage 1 camshaft, welded rockers, and did some port cleanup while I was in there. The bike runs really well.....but I certainly could have just tightened up the flywheel and motored down the road for a long, long time.
If you are going to keep this bike a long time - then do what you believe will keep you from worrying about the repairs. If you are going to sell the bike in a year or two.....then you may not want to be as picky.
You are in the same predicament that I was. You had some stripped threads that made you take the cylinder off to get the oil leak fixed....now you are working on a complete engine rebuild!
And worst of all - this is the best part of the year for riding...not wrenchin'.
Dave