Series 2/2a piston

[Boofrmb]

Hi All.

Hope someone out there would have the details im chasing.

I require if possible a complete detail spec on the pistons that was used in the Series 2 2a petrol motors. I know it strange, but trying to help a friend out.

The details are the exact measurement of the piston including ring grooves and gudgeon pin size.

Thanks in advance.

Robert

[Lotz-A-Landies]

There are original and after-market replacements where different manufacturers can have different spacings and particularly for the oil/scraper ring.

Surely what you want is the height of the piston and the centre of the gudgeon pin.

I can try to measure some over the weekend but not before Friday.

[Boofrmb]

There are original and after-market replacements where different manufacturers can have different spacings and particularly for the oil/scraper ring.

Surely what you want is the height of the piston and the centre of the gudgeon pin.

I can try to measure some over the weekend but not before Friday.

Thanks

[Lotz-A-Landies]

Gudgeon pin 2.987"or 75.8mm
1"or 25.39mm

Centre of gudgeon pin to top of piston 2.281"

top of top ring groove to top of piston 15.87mm

bottom of second ring groove to top of piston 24.05mm

compression ring groove 1.84mm

bottom of oil ring groove to top of piston 31.52mm