Some of us are receiving our 675's with throttles that are WAY out of the 2-3mm specifications.
Although many may find that throttle adjustment may be beyond the "How To" need, I have noticed that the owner's manual mentions how to adjust the throttle cable at the throttle body, but makes no mention whatsoever of the "in-line" adjuster up near the twist-grip.
For that reason, I submit the following.
WARNING!! -- If you do not feel 100% comfortable monkeying w/ your throttle adjustment DO NOT DO THIS!!! Leave it for your authorized Triumph repair facility. If you hose this, you could hurt yourself badly.
#1 - Locate the inline adjuster! It is about three inches (75mm) downstream (down throttle cable?) of the right grip. In this picture, it is circled in green. It is protected by two rubber sleeves, one fitting tightly inside the other. Seperate these to reveal the adjuster:
#2 - Using your 10mm and 8mm open-end wrenches (spanners), hold the 8mm side while you loosen the 10mm locknut. This will then enable you to rotate the 8mm section, to either add length to the cable sleeve (decreasing slack) or reduce length (increasing slack).
#3 - The manual recommends that there be 2-3mm of slack in the rotation of the grip before the RPM of the engine increases. Please understand the reasoning behind this: When the bars are turned from one side to the other, it can lengthen and reduce the APPARENT length of the cable sleeves, making the RPM increase on its own if that 2-3mm wasn't there. FOR THIS REASON, I recommend that you turn the bars full lock to ensure that the new setting doesn't inadvertantly rev you up when you're not expecting it.
#4 - Tighten 10mm locknut up to the 8mm section by holding the 8mm still while tightening the 10mm.
#5 - Replace protective sleeves.
#6 - Enjoy reduced throttle slop.
*** Author assumes no liability for accuracy of information contained within as it is provided "informational" in nature. Author assumes no liability for differences between photo'd 675 and your own. Author assumes no responsibility if you tighten up the throttle to the point that it is revving @ 5k @ idle and you can no longer control the bike. Perform this work at your own risk.