Just finished a 1700 Xflow piston and head re build. Whilst honing the bores is best, if the bores are in good condition, the use of wet and dry in the bores is permissable (that'll cause a few comments!). Bores and bearings must be well protected though and a compressor is useful . Don't just re ring the pistons, as the pistons, unless they're forged will have worn at the lands between the rings. Buy a new set of AE cast pistons complete with fitted rings ang gudgeon pins, balance equally, and fit carefully into the bores. I've run mine in for 1000miles at not exceeding 3K RPM and it hasn't blown up yet!