you got a meter?
Since you're using LED's it throws off the voltage. On my shadow, when I put LED's on the rear, I had to go to autozone to get a 2 dollar flasher relay and stick it in line to make sure that everything blinked properly and at the right speed. I haven't picked up my FZ8, but when I do, I'll take a look at the wiring and see if there's a flasher unit in there.
You may have to do that. lemme dig up the wiring config I used and post it.
here's the link that I used for my LED's... scroll down through the instructions to the flasher unit.
http://www.cdhughes.net/ledbikelights/
Correcting the fast flash
If you want to correct the fast blink rate, you can find a 2 pole electronic flasher relay at an auto parts store for less than 20 dollars.
This is what the factory relay looks like. It has 3 wires coming out. The Black w/ brown stripe is for the power (battery). The Gray wire is to the lights (load) and the green wire is for the ground. Cut the relay off and heat shrink the green wire, it is not used.
The new relay will have 2 poles. One will be labeled �L� and one will be either� �X or �B� depending on the brand. They both have the same function so it doesn�t matter what it says. The gray wire from the factory harness will go to the �L� terminal. Use a female spade connector to attach it. The Black/ brown wire will go to the other terminal.
here's the flasher unit from the Shadow: