These guys are more off road, I think but they came up when I googled for a SuperSprox 17T for the ZX-14. They sent the package quickly. I was unable to install because of poor fit. I do not know if the part was machined poorly or if it was simply wrong. The splines were so close to identical compared to the OEM sprocket that I was unable to confirm a problem based on visual examination. The part would not fit however. Seemed a tiny bit small for the output shaft.
I called Rocky Mountain about a week after receiving the order and they emailed me a UPS return shipping label free of charge. I sent the sprocket back and they sent me another which arrived within a week even though it was backordered. The new sprocket went on perfectly.
Thumbs up for Rocky Mountain ATV & MC. Honest, quick customer service.