Fast blinking blinkers.

[fasternyou929]

Originally Posted by Triple

That's what I thought and this was initially the case with my bike. The front-left blinker bulb was out, causing the rear-left blinker to flash at double speed. However, I replaced the front bulb and now they both flash at double speed.

I have aftermarket blinkers front and back, but I've had them on there for almost two years and the fast blinking didn't start until a bulb went out last week.

Then the bulb you used as a replacement doesn't have the same resistance as your stock ones. Same solutions apply.