I found out that the "old" Suzuki GSXR-750 pistons could probably be a great exchange piston for my daihatsu engines.
I asked two piston manufactors for some details on their exchange pistons, but they don't want to give me any detail on this (they tried to sell my custom pistons which cost far too much for me low budget projects).
Eventually someone of you had their hand on following bike engine:
Suzuki GSXR 750 - up to 1987
Suzuki GSXR 750 - 1990-1991
Suzuki GSXR 750 - 1992-1995
All of them are 70.00mm wide pistons with a 18mm rod connection.
What I need is the compression height of the pistons.
The "official" measurement is from the middle of the rod connection to the upper border (ignoring the dome or bowl).
I am also happy when you just measure from the upper end of the rod-eye to the piston border.
Thanks in advance,
Daniel