Gear Shifting

[cayuse]

I don't have a tach (yet) and I've never been sure of my rpm's so I thought I would exercise the noodle and came up with these charts.

There are some interesting figures here:
It confirms the tach results some are reporting in 5th gear: rpm's are ~10x mph
If you want to hear 8000rpm's go to 50mph in 3rd gear (!)
Seems to be OK, at least for short periods, to go 65mph in 4th (ie redline is just below 70mph)
Stepping up to 16-tooth gearing will bring you down below peak HP and torque at 70mph so don't expect to go faster with that mod.
I've always been impressed with the accel I get with this little motor when I let it wind out a little. Now, I've got some peace of mind that I'm not over-revving.