I still use the clutch in traffic if I'm blocked in, I'm 80kg on a 320 bike, maybe it makes a difference, upshift only needs a tiny bit of acceleration, can coast it in as well once you get the feel of it, I have the bridge in at the minute, tuning it after a cam change.
the ignition or fuel cut out shift works good! & on average at the drags was good for three tenths of a second off you quarter mile ET, as long as you made no mistakes. the more HP & TQ your motor puts out the harder it gets, as more pressure on the gears, the cut out & also back cut gears makes even more difference. but I don't use the cut out, I learnt to shift quick without it, as racing Screamin eagle Harley class back in the early year 2000's , an ignition cut out was illegal, same as air or electric shift & traction control. but these day's new bikes come stock with all that ( some of them )
Still no track here Krash so no black dyno to play on, this ignition interupter isn't just about going fast but when you do it's hold it flat and feed it gears with a grin from ear to ear material. It's also really adaptable with the auxiliary output, you could set it up to fire an air or electric shifter at whatever RPM in conjunction with the ignition cut, you may well be the fastest gear change Harley pilot on earth but you wouldn't beat that set up :)
Yep, I have to smile EVERY time I see a Harley rider take off like a bat outta hell from the lights and then pauses for 20 seconds halfway through the Intersection as they chaneg up gears.