Roller weights.. Yes i know what your thinking!!

ive read a few threads but ive just checked my rollers and most of them have flat spots and im just confused as to what ones to buy. Im not asking for a discussion of whom knows more about speed and acceleration, im asking for a link to rollers that will work on my bike as i have no idea what to go for. I have a mallosi 172 ac typhoon with a pm59 and 25mm carb vforce 3 reeds so i dont know what weight to go for? All help appreciated!!

 

The std 12.5g would work ok, don't bother with Malossi as they wear out to quick! I can't do a link as I don't know how to.