Super Jet Bore size

[lazyt747]

Took off the ADA girdled head off of my ski today. Anyone know from the pictures what the bore size is from the numbering on the head of the pistons?

Thanks guys.

 

[#ZERO]

The pistons are stamped 25 on top so that would mean you have a 0.25mm oversize from the 63M 1100 stock bore size which would be 81.25mm.

 

[lazyt747]

Sweet, thanks.

What would the displacement be considered now?

 

[#ZERO]

Stock is 700.8CCs and with your oversize pistons it would be 705.1CCs which is not much more than stock displacement.

Here's an easy engine displacement calculator: http://www.bgsoflex.com/displacement.html

 

[lazyt747]

Cool, thanks for the info and site Zero.