Unbolt the ferring, and remove the cluster. Unscrew the back cover of the cluster. On the speedo side, you will see the following wires. Green Black. Black Brown. Red Green and Pink Green. Take note of that pink green wire. (Do not touch it. That is the speed sensor wire for the speedo from the gearbox, if you unscrew that, your speedo WON'T WORK) Looking at the back of the speedo (cluster), you will see a second pink green wire that is just off the the left that is screwed at the bottom on a line of 4 screwed in wires. Unscrew that second pink and green wire, tape it up. And there you have it. Speed limiter removed. So in short, look for the pink and green wire that is as close to the center of the cluster as possible, and unscrew and tape up. It should take around 10 minutes. EASY AS! The longest part is removing the ferring and 3 cluster bolts. - You don;t even need to unplug the loom. If you pull the cluster right apart there is a little chip in there that sends the cut signal to the ecu. Technically now the ECU doesn;t know how fast you are going. I had a Firestorm that was limited to 185k's, after a 10 minute job, and a 20 minute ride, I have my bike now rev limiting in top gear around 268k's/hr . . . PLEASE REMEMBER ... RESPECT THE POWER AND SPEED. ONE WRONG BLINK AND IT'LL BE CURTAINS. BE SAFE.

 

166 miles per hour on a Firestorm? Really?

What did you do to the engine?

 

It's an ex race bike that has been made road legal (Hence the original ECU and cluster going back in). I don;t know exactly what's been done. It's not like it hit the rev limiter in seconds, It got to 240 easy but then slowly crept up until it limited. I doubt very much it had much left.

 

I am not aware of the US models being speed restricted. I've hit redline in top gear before, no problem. I think it was indicated 165-170mph, going from memory.

 

Hi "Jamie Daugherty" Cheers for your support! The Super Hawkes, US Spec have little to no restrictions, same as the European Models. Down under here in NZ we sometimes get Japanese imports which are sadly limited. But yes, the indicated speed was that 160+ish MPH - or in my case 265+ kph.