I've been into RD350's and 250's and have refurbished 3 of them.
I bought a KH500 a couple of years back and am done with all except the engine. That has been waiting until fall in Houston so that I can disassemble it and send the crank out for refurbishment and get the cylinders bored for new pistons. Progress is being made
Last week, while minding my own business on Craigslist, I come across a mostly complete '73 S2. $1400 later it's mine. It is missing the center jug and the outboard jugs are already on an overbore (0.5 mm on one and 1.0 mm on another)
and they need reboring.
I bought a set of three what were supposed to be s2 jugs on ebay and they turned out to be S3 400 cc jugs. It turns out that S2 jugs are not common and I have been having difficulty finding them.
I think I know the answer - but can S3 jugs be used on an S2? The crankcases are different part numbers and the spigots are larger on the S3 so I would guess not. But I thought I would check with the experts.
Wanted to see if there was interchangability like with RD350 and RD250 jugs which are a direct swap.
If they don't interchange, I will keep hunting.
Thanks!