here is how I installed dr pulley sliders in my bv 350. stock rollers are
25 x 16 - 15.9grams. sliders don't come in this size yet.
I got my sliders from buggy parts NW, in size of 25 x 17 - 15 grams.
I then trimed the sliders, using the side of a grinding wheel too
16 width. this lowered the weight to 14.6 grams. my bv had 4500 miles on it and the stock rollers were flatspotted. IMO scot runs better, improved
take-off and I think lower rpms at speed. no tach for proof.