Thruxton Quickshifter

Don’t do it.
It’s a lazy engine and box it’s not a high revving slick change.

I love QuickShifters but not a Thruxton.
If you do really really want one go for a HM unit that’s adjustable.
The best I’ve used as an aftermarket part

 

I have and love it, I would say its not really usable shifting from 1st to 2nd but after that its fine and quite addictive. Only works on upshifts too.
Used the original wiring harness so was plug and play.

 

Got it from a guy in Aus, who was making the kits.
https://m.facebook.com/groups/1767965020116837?view=permalink&id=2058985884348081

 

I’ve used these HM ones on all my race bikes, if you want one I can highly recommend these and their services are second to none

https://hmquickshifter.com/quickshifter-plus/

 

But the R version comes with QS plug'n'play so its something that Triumph has make room for. Is your bike the R?