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View Full Version : TR4/4A TR3 or TR4 piston replacement question



TFR
02-11-2008, 09:56 AM
Moss doesn't offer an 87mm piston for the TR3 or TR4 but has an 86mm plus .040" Isn't an 86mm plus .040" an 87mm piston?

martx-5
02-11-2008, 10:24 AM
One mm = 0.03937"---not quite 0.040". Don't know if that makes a difference.

PeterK
02-11-2008, 10:34 AM
Yes. 86mm + .040 is considered 87mm for our TRs.