While reading through the workshop manual of the 630, I came across a section mentioning the gear position sensor and the different resistances it provides in each gear. Now I remember reading about a gear sensor mod for the 690 KTMs and wonder if the ECU might limit power in some of the lower gears on the 630 as well?
Sport bikes have been doing this forever. Never thought about why the 630 needed a gps. It probably does play a role in timing though. Not sure I need any more power in the lower gears. .
Next time I get bored I'll do a pull in a lower gear and watch the timing. It's cool with iBeat to watch whats going on. View: http://youtu.be/HHIGioqJ2ME .
I thought it was the other way around, they tamed the power down in the lower gears, so ham-fisted riders wouldn't sue when they pooed themselves. A simple experiment would be to interrupt the GPS line with a variable resistor, and see what happens.
I can't test what happens if you disconnect the sensor or just use a fixed resistance right now, since my bike won't be street legal until next week. So if nobody else trys it out until then, I'll report back.
Bike's finally ready again and the snow is gone. So I tried disconnecting the sensor. I'm not 100% sure, since I can only do tests wether the bike feels faster or not, but it seems to melike it pulls stronger in the higher revs without the sensor connected. A friend of mine drove the bike as well and felt the same. Of course it would be better if someone could look at changes in the spark advance, timing etc, since I don't have the equipment for that.
Has anyone else looked at the values of the gear position sensor (the resistance) and compared it to the workshop manual? I can't tell if I've completely lost the plot or not, but mine is producing the correct resistance values just not in the correct sequence for the gears that's indicated in the workshop manual.....Is it just me or does this workshop manual seem to have more than the odd error?
