Since these were for a CBR600, I was hoping that the bore size may be larger. Not sure if it is but it works as well as the last brake lever. Maybe better but probably just imagining.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
Either way, they went right on. The banjo end on the RX3 is a 10mm, as is the lever. The levers came with its own banjo bolt and crush washers anyway (plus extra wire connectors that weren't needed). The bolts were the same size and length but the threads were different so keep the old bolt with the old levers.
Mirrors were the same size and no problems mounting them.
Even the wire connections for the switches were the same size and both brake light and clutch safety switch work. Since the levers are for a crotch rocket, they're a wee stubby but work just fine and accommodate the fingers.
These come in different colors and they took WEEKS to arrive. Serious "slow boat from China" but if you like bling, worth the wait.
Better function? About the same.
Cool factor? Absolutely.