21-04-16, 11:57 PM
LEDs don't take a lot of current, so they'll work in parallel with the existing indicators ok. Take those away and the flasher relay will probably speed up as when a bulb has blown unless you add a load resistor or change the relay for an electronic type that isn't fussy about loading.
Taking the existing rear indicators off would probably be an MOT failure anyway:
Road Vehicles Lighting Regulations 1989
Schedule 7, Part 1, Paragraph 2(ii)B
(Minimum separation distance between indicators on opposite sides of a vehicle):
A solo motor bicycle having an engine exceeding 50 cc and first used on or after 1st April 1986–
(1) Front indicators: 300 mm
(2) Rear indicators: 240 mm
Taking the existing rear indicators off would probably be an MOT failure anyway:
Road Vehicles Lighting Regulations 1989
Schedule 7, Part 1, Paragraph 2(ii)B
(Minimum separation distance between indicators on opposite sides of a vehicle):
A solo motor bicycle having an engine exceeding 50 cc and first used on or after 1st April 1986–
(1) Front indicators: 300 mm
(2) Rear indicators: 240 mm