I've found a good set of 10:1 pistons with matching cilinders. Done approx 14k kilometers. Only problem is I don't know which piston was used in which cilinder. Is there a way to find out? Or is replacing the rings the only solid option?
Léon

measure and match wear marks or just watch the leftie for a while

Why put used, mismatched parts in your bike? Unless the parts are unavailable, I would hone it and put new rings on the pistons if they measure out correctly. All that hassle to build a pokey smoker.

You're right if this isn't possible. It's all about reducing costs if possible. Got more projects I'm working on
Léon

Brutus, I guess in a perfect world you would fit new rings and all that other " more money than brains" stuff, but I bet if you just pick a piston and rings , stick them in one of the cylinders , same for the other, assemble as usual and start er up , and you wont be able to pick the difference from new parts . 14k is just run in and it would be a waist to not use those parts somewhere.
There are people out there that will wank on about only using new original parts, fitted in surgically clean workshops , and look down their ( large red ) noses at anything that's not factory or correct.................a lot of these Dicks hardly ride their bikes ... if at all, in the real world . Not something I have noticed here............um , if you have an RD400 you probly know what I mean

[quote="Mc tool"if you have an RD400 you probly know what I mean [/quote]

Possible thread hijack which someone will delete if needed, but what the F@!#*, so how is the holey piston RD project coming along anyway?

Cheers

Himself

By the way, I can see some kind of "MP" logo impressed in my vertical cilinder, close to the belt cover. Is it standard or do I have big bore too?