Chopper Key Veteran Location: Stow,Oh- oops, I mean St Louis, nope Stow again
| Both are working great. The 80 seems best suited for 700mm blades, and the 90 has more power and will swing the 710 blades. the 90 is a little fussier to tune, but has more power (do you really need it?) You will also need to extend the tail for the longer blades. Either is a good choice.
The Hatori SB15 muffler will work on either.
The upper double bearing is great and I consider this a "must have." I havent tried the lower one yet. |