> Born to be WillD Wrote:
> Great write up, maybe I missed it, what're you collecting data from? I
> used a phone app called speedlogger to export acceleration and speed but
> wound up finding it easier to scrap the acceleration data and just go
> off simple derivative of measured speed. The rather than the complete
> conversion to dyno I'd just make a few repeatable circuits around the
> neighborhood and overlay the plots
Data came out of a newer GoPro with the accelerometer and GPS built in (same stuff you see in the video overlay).
The bike is scootin pretty good at the moment, but there's definitely a lot more in it.
Inevitably I had to spruce up a couple little things in the wiring: add a ground strap from battery to frame, resistor in line with the Trail Tech Vapor (tach is rock solid and believable now), found a great deal on a 6Ah Lithium battery too, $30 on Amazon.
With a now-accurate tach, it's clear that something funny is going on, the bike hits a hard wall at around 12k-12.5k, feels exactly like when my Peugeot was foaming the float bowl (and it has some butt-numbing levels of vibration at that speed). Or could be spark cutting out?
Regardless, this thing should pull 14k+, and it should at least start four-stroking up top or something, but no, it feels like I'm hitting the kill switch til the revs dip enough, it blasts back up in speed then dies out again.
That said, it accelerates hard up to that cut out point, even up 5%+ grades going 40mph at 6400ft elevation, and I'm still getting the jetting dialed in and haven't done anything to improve performance yet. This thing has some potential for sure.
Outta town most of this week and next, so won't have too many updates any time soon.