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[ColoPaul]

I noticed my drive belt is getting a little loose.  Last I checked, around 1000 miles, it was within the 20-30 kg spec limit.
Now it's down to 15 kg. (2170 miles)   So I'm thinking about tightening it.
Anyone out there done this yet?  I know offthegrid has popped his motor in and out so maybe he can answer!
The motor hex bolts need 18 & 22 ft-pounds.  All I have for Allen wrenches are little "L" shaped ones, maybe 1"x4".  Clearly those won't do.
Also, the access to some of the bolts seems, ummm, not real direct.

What size/style allen wrenches are good?
Any tips for getting at the 4 motor mount bolts?

Thanks in advance...

[dkw12002]

I think they would work. I removed my rear wheel and axle using a cheap set of Husky Allen wrenches. I imagine the axle is as tight as anything on the bike. The hex nut was 6 mm. My kit has a plastic handle that the hex key fits into so you can get good leverage. I suppose you could break one, but I didn't. Try it.

[Electric Terry]

I'm pretty sure I used the little L shaped ones myself.  I do like to use a regular box end wrench on the end of the allen key for leverage though to break bolts loose.  I'll pay better attention when I replace my motor next time, which looks like it will be happening in a week or two, as I think the potting material for the encoder under repeated thermal expansion has allowed shifting to a less than optimal position.

[Richard230]

My recollection is that the Zero owners manual has a section describing how to properly move the motor to adjust the tension of the belt drive.  While I haven't had to adjust my belt yet, it looks easy enough.  All you need is the proper size hex wrench socket attachment and a short extension for your 3/8" drive ratchet and torque wrenches.  These items are sold in every Sears store tool section - as well as most hardware stores.

[manlytom]

I used standard tools and my Harley tool kit to loosen the motor today. You meed these special size Allen keys.
In fact i had to go on and get the motor Out. But this is another thread.

[ColoPaul]

OK, got the belt all tensioned properly.  It wasn't too bad, could do it in about 10 minutes now that I've been through it.
I did buy a #5 and #6 allen hex adapter for my socket wrench.  That made 3 out of the 4 motor bolts a snap!
The top back motor bolt is hard to get at.  I had to use my little hex key rigged with a plastic 'extender' to get it loose.
The bottom back motor bolt is partially blocked by the belt - no big deal with the socket wrench & an extender
Same with the bottom front bolt, partially blocked by the brake lever - again no big deal.

Also, as a added bonus, during the process I noted that my kickstand bolt was WAY loose  (a good 6 full turns!) and I was probably about to lose the kickstand in the next 100-200 miles....

[dkw12002]

Good documentation. Should be useful for other people. Saved yourself $50 too.