GT550 piston dimensions

[Gerrit]

Can anyone provide the following dimensions for the GT550 piston?

Gudgeon pin diameter (16 mm?).
Piston ring thickness (1.5 mm?).
Skirt height from edge of piston crown to bottom of skirt.
Height from centreline of gudgeon pin to edge of piston crown.
Piston crown height (4 mm?).

Thanks in advance!

[tz375]

Can anyone provide the following dimensions for the GT550 piston?

Gudgeon pin diameter (16 mm?). YES
Piston ring thickness (1.5 mm?). YES
Skirt height from edge of piston crown to bottom of skirt. 69mm
Height from centreline of gudgeon pin to edge of piston crown. 23+8= 31mm
Piston crown height (4 mm?). YES

Thanks in advance!

If you have a 64mm piston with similar dimensions I'd love to hear about it.

[Alan H]

Which type of piston? Nickasil bore type or standard.

[tz375]

Did the piston change or just ring material?

[Alan H]

Extra ports in the Nickasil bores.
Different part numbers for J to K to M,A,B.
Although I've got J pistons in K bores in mine and any difference wasn't noticeable.