A few words on fire extinguishers. As Shawn says, don't try to be a hero when using one. Most fires in a Triumph are going to occur in the area of the carbs (how many of you have seen the proverbial blistered right bonnet) and need quick reaction, really quick reaction. If you are able to get the bonnet release open and if you are able to get your seat belt off, passenger out and grab a fire extinguisher, you might be lucky enough to snuff out the fire before it destroys your ride. Pegasus Racing, for those of you with a faux roll bar (like me) makes a nifty fire extinguisher bracket that affixes to the roll bar. I have mine located where I can grab it with one hand quickly, for what it is worth. I have seen an onboard extinguisher setup, aimed primarily at the engine bay, that was cool but difficult to setup and not real practical for a street machine. Again, don't try to be a hero. Get yourself and your passenger out fast.
That is why I carry American Collector Insurance.