Thinking of one tooth less...

[ChristoT]

2 up on rear peps up the bike without making impossible to control or keep down.
Did it on mine and like it a lot.
But remember it will throw the speedo out. I used a speedo healer but that ain't a cheap mod.

Er - really?

That may be true for bikes where the speed sensor is mounted to the front sprocket / driveshaft, but on the FZS600 at least, the speedo is driven from the front wheel, nothing to do with the sprockets! Isn't the Thou like this too?

EDIT: I now see the Thou's speedo sensor is off the driveshaft. I withdraw (as the bishop said to the actress).