Diana 27 Piston dimensions

[rellis]

Hi all, could some one out help me out with the dimensions of a English diana 27 piston, need the internal diameter and internal length, and outside length, need the dimensions so i can order tuning kit from Tinbuns, and its what he has asked for, i haven't got mine apart and rather have the kit before i pull it a part just hoping some kind soul might have one laying about they could do a quick measurement. thanks.

[Mark Palmer]

If they are asking for internal dimensions, it would indicate that there may be variations during the production run... it's a 5 minute job to strip one of those, also if you have a damaged piston, you may be in need of additional spares

[deejayuu]

Hello again. One here is 19.95 mm ID and 102 mm deep. Not much room for sleeve with original spring if memory serves.