Hi All,
Sorry to revive an old thread, but did you ever get to the bottom of the differences between the GFR and Crono piston, and why the GFR runs a higher comp ratio using the same piston/cylinder dims?
I'm only asking, as I need a replacement piston for the GFR and they are ridiculous costs, whereas the Crono piston kit is half the price, and I'm wondering if it's worth a punt to get the old gal going and run in again. Once I've got all the work done and kinks ironed out, from rebuilding a tempermental italian bike before being stored in bits for 18 years, then I can splash the cash on the real deal..... is it worth it do you think?