Quote from: m in sc on June 30, 2019, 07:18:09 AMbolts right on. no mechanical mods needed.
I'm stuck on the other side of this question. I had to have the cylinders for my 71 R5B bored out to 65mm. I found some 65mm pistons and rings in a website from a 2-stroke company that said they also had R5 parts. I can't necessarily say that the information was a little confusing...they didn't specifically say the pistons and rings I was buying would work for R5, but I didn't know any better. Anyway, I bought the RD pistons and ring sets and installed them yesterday, not knowing for sure whether the holes in one side of the pistons would only work with an RD/Reed Valve cylinder.
Thankfully I found info about the holes on the pistons would NOT work properly with my R5, so now I'm searching for a two 65MM piston and ring sets specifically for a R5. Do I have a chance in h&ll of finding them?