RM125A piston

[bigk]

I have found that a Suzuki TS125R piston is very close and will work by either running it with only the top ring or shifting the bottom ring locating pin.
Cheers,
K.

[090]

Nice one. Now that you mention it, i think that was the mod done to mine (move pin)

[Doc]

BigK..the TS125R piston are a 14mm gudgeon opposed to the RM125A 16mm. Does this R designation point to a different (later) R?   '71 and '94 were the only times Suzuki used this designation. (that I know of)

[bigk]

Pro X part # 01.3007.200 listed to suit Suzuki TSR125. 16mm piston pin.
Cheers,
K

[Doc]

okay..TSR..makes sense BigK..JDM model..this is a '96 model TSR125. Is there any property differences between an aircooled piston and a water cooled piston?? I never looked as anything bar air cooled thinking the watercooled may heat up faster and require different tolerances..

[bigk]

No difference in my experience in water cooled versus air cooled pistons. I have total confidence this piston will be fine. The bike is going to be raced, so it will be a good test.
Cheers,
K

[Doc]

I love to hear someone with oodles of confidence!  Thanks for the tip BigK, I can start looking at a whole swag of pistons and rings I'd previously overlooked 

[GMC]

Doc, I'm sure the alloy would be the same in all pistons (brand to brand)
Watercooled engines may have a different tollerance but this would be up to the guy that is boring it as they usually bore to suit the piston.

[Lozza]

Usually there is no real difference between air and watercooled pistons.Water cooled models just run more compression, with todays piston/machining technology you have little to worry about.
To use these pistions in old TM/TS you might need to swap to an RGV rod or such.