RM125A v RM125B pistons?

[Doc]

K..the 125S use 14mm s/e pin, only the RM125A used the 16mm

[albrid-3]

Would there be anybody interested in a RM125A complete bike in mint condition

[John Orchard]

K..the 125S use 14mm s/e pin, only the RM125A used the 16mm

So I'm looking at a TS125 piston or an RM125S piston, I'd expect the RM piston to be more acommodating for extra boost ports.

[TT5 Matt]

rm125s pistons and rings are like hens teeth to buy but rm125m are still plentyfull last time i went checking ebay for parts for them and the m is a 6 transfer port cylinder like the s is sooo the pins in the ring lands might be in the right position.

[Lozza]

John the best thing you could do for that type of racing is increase the stroke(easy peasy) run a longer rod with the full reed motor. Rod swaps are not easy due to the 19mm crank pin.

[JohnnyO]

John the best thing you could do for that type of racing is increase the stroke(easy peasy) run a longer rod with the full reed motor. Rod swaps are not easy due to the 19mm crank pin.

Which motor are you thinking of? They didn't go to a full reed until the '82 watercooled.

[Lozza]

John the best thing you could do for that type of racing is increase the stroke(easy peasy) run a longer rod with the full reed motor. Rod swaps are not easy due to the 19mm crank pin.

Which motor are you thinking of? They didn't go to a full reed until the '82 watercooled.

Was thinking of the water cooled engine.