I bought a pair of used CBR600F4i front calipers off fleabay to go with the RC51 MC I already had tried. After machining the calipers to fit the VTR and trying to resurface the pads that came in the F4i calipers, I decided to buy new pads for $70, more than the used calipers cost (ouch). I found the F4i pads have a larger swept area on the VTR rotors than the OE calipers did, which I'm monitoring closely.

Anyway, I now have a 2 brand new sets (i.e., 4 pads) of EBC FA187 Green (Kevlar) in their unopened package that fit the VTR OEM calipers for sale for $25 plus shipping, and 2 pairs of sets of EBC FA187 HH sintered pads with less than 1,000 miles on them for sale for $15 plus shipping per set of 4 pads. Whereas most Forum members seem to like the EBC HH's, they were too powerful for my tastes. Same thing goes for the set of VTR FA174 HH sintered EBC rear caliper pads I tried for maybe 200 miles, which I also have for sale for $20 plus shipping.