I'm just digging into the world of big bore kits, and I have some simple questions about the reliability of bigger displacement kits. Over-bore kits appear to come in +4, +5 and +5.5 mm. Can you go as far as +5.5 mm and still have commuter-level reliability? From what I've read on TT, you can with a +4, but what of the bigger bores? Also, I've read that some strokers require a piston so light that it has less rings on it, and it is therefore prone to wear quickly. Is that right? Is it true of all strokers? And if you want to give specific advice: I of course want more power, but don't want to sacrifice stock reliability for it, and want to spend as little as possible. Oh, and finally, are new cams requisite with a big bore kit? Or can they be put off until later?