Chinese headlights canbe poop.... although I've only tried car ones (for my Toyota Hiace camper). They looked fine, but the first time we went to adjust their alignment, the screws just kept turning on each unit and no movement of the reflector. I put the aged but still fine originals back on and the new ones back in their boxes. A waste of time & money there. They were cheap for a reason!
A waste of money.... don't know about these RC51 units, but I'd prefer OEM if it were me.
I actually have a set of OEM's stored away somewhere if you're in desperate need?
Euro RC51 SP2: HRC WSB Ti Hi-Level, T1 Airbox & Snorkel, PCIII, Dymag CA5 Carbon Wheels, Ti64 Spindles (F, R & Swing Arm), Mori Link, Maxton GP7 Shock & Ohlins 832 Forks, Brembo GP Calipers & SBK narrow track (F), Braketech Disc (R), Brembo billet Underslung x 2 Brembo RCS, Tyga Triple, 7075 Stem, Probolt Titanium all over, Babyface rearsets, MR Complete Carbon Lineup, Custom Undertail & CBR 1000 LED, Watsen LED Indicators, Harris Brace, Giles clip-ons, Corbin seat, etc. 2013 BOTY.