Hi, My 64 Cento engine seems to be lacking power, (doesn't like hills). When I rebuilt the engine, I was concentrating on the gearbox and all the oil seals, but I did install a new crank and conrod. The original cylinder and piston seemed OK, (still at the standard 51.0 mm size, never been rebored), so just got new piston rings. I'm now thinking that the cylinder and piston may be worn and this could be causing the lack of power.
Does anyone still do a cylinder rebore service ? New (SIL) Cylinders and Borgo or Mahle pistons are readily available and seem reasonably priced, so is replacement the way to go ? Any advice much appreciated
Cheers