to tighten the center nut you need a spanner socket or whatever the hell they are called.
Triumph sells them for like a million dollars each. I made one by grinding down a cheap socket that i bought.
To tighten it, you MUST have all the weight off the forks. That means jacking the bike up from the engine or frame. Otherwise it gets pinched and you'll just destroy that nut.
The LED is part of the Triumph factory alarm system. It blinks when the alarm is on. If you do not have the factory alarm, it does absolutely nothing.
