Overview Reviews Product Description Turn Signal Flasher Relay Fits RD400 12V/23W Round use for RD400 and many other vintage motorcycles. Product Videos Product Reviews Write a Review Write a Review × Turn Signal Flasher Relay 12 volt 23 watt 21-6554 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *