Try Jim Parker in Ashwood, he may well have correct ones in stock, it used to be quite a common conversion for 741 motors, as well as earlier scouts. the 741 has the same stroke as a 37" scout, with a smaller standard bore, usually bored out to the 2.75" of the scout now, for piston avaiability. With HD 45 " flywheels that makes it a 45" too, with a bits more guts. 

The 741 cylinders will fit straight on your 37" scout too, and are a lot easier to find. 

What is your piston height at the moment ? 

Let us know what you find out and how you go, pics and news for the 101 magazine would be good too. 

cheers,

 Tim

Congratulations on the new bike, by the way. Very keen to hear how it goes, and what you find out.

cheers,

 Tim

Hi Gene

Long story short ironically the pistons would have been ok. With a newly acquired reconditioned maggy, replacing valve followers and still not running. The front head was removed revealing a damaged cylinder wall.

Bike went from needing to be sorted to being totally unknown and requiring too large an investment,  it was certainly not as advertised . Contradictory information surrounding the restoration was a growing concern.

Sold it back to him. very disappointing.

Thanks for your interest

Haydn

Hi

I think I will stick with my 44 chief