Harley-Davidson model 25JE. This is a 1000cc OHV from 1925. With racing saddle, front fork and handlebars? The tanks are from a peashooter (350cc). This was done a lot on racers because they were much narrower and less heavy. The only thing that needs to be done to these tanks to fit is to make the openings on the recchter side for the rocker arms. Using these narrow tanks also makes the line of this motorcycle much nicer.

‍