Any ideas what this noise is? Does your Vectrix VX-1 do that?
Focus on the low-pitched noise (ignore the brake grinding). If yours is smooth and quiet, do you have any guesses? I can't tell if it is from the gears or the motor or the bearings. I did not notice it when I test-rode the bike and only noticed after I bought it and 200 miles away, rolling it inside my garage... The three missing bolts worry me too - they are evenly spaced, so it tells me someone messed with the cover and did not put them back on assembly...
Looks like the bolts might not be missing after all - this video shows the same holes: http://youtu.be/K1ID3qUTYBU
Seems Mik's does exactly the same noise! http://youtu.be/50xG-Z_J7cE
Was there a thread about this? Normal?
False alarm, hopefully: see gearbox clunking noise and cogging threads.
http://visforvoltage.org/forum/12708-vectrix-gearbox-clunking
http://visforvoltage.org/forum/4193-mik-question-about-gear-noise#comment-30415
Whew!
The three empty holes are needed to remove the gearbox cover.
You put bolts in these holes and slowly tighten them, after enough entrance the cover is pushed off the gearbox.
Hope this helps.
Once you go EV, Gas is history!
Thanks, that helps explain it (about the bolt holes)!
Just my 2c worth and bearing in mind i haven't watched your video...
I recently had a worry about my VX-1 that whined horribly at 70-80kmh
I thought at first it was a bearing wear /resonant frequency problem
However it had happend after i had rebuilt the bike and it turned out (after putting the bike on the dyno to inspect it at speed), that this particular model of tyre just happens to make that noise at that speed weirdly (and it is fitted the correct way around incidentally)
So there you go - sometimes its just tyres.
Not the tires in this case - as mentioned, this was the normal magnetic forces creating it.
That said, my rear tire is worn off in a weird way from the previous owner riding it under inflated. It does make noise on even the slightest turns. Has almost all of its thread intact, but the contact patches between threads just off-center are worn down at their edges by a couple mm as they fan out from the center line. So the tire there is not round but bumpy... Will need to change it prematurely because of that.