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Old 08-24-2014, 03:32 PM   #9 (permalink)
puddleglum
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Join Date: Oct 2009
Location: Red Deer, AB
Posts: 421

Rondo - '07 Kia Rondo EX
Last 3: 20.47 mpg (US)

Tinkertoy2 - '00 Toyota Echo base
Team Toyota
Last 3: 46.03 mpg (US)
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Now to the mods. As with most mountain bikes, the gearing was too low for the speeds I wanted. I switched out the crankset for an old one with 28-38-48 rings from a scraped bike. It is steel so I may upgrade it later. I had bought a DNP 11-32 freewheel a couple of years ago to upgrade a mtb for commuting but never used it. I fitted that to the Izip wheels and switched them over to the Raleigh. I now have pedal ability to about 54kph for some fast down hills or further upgrades. I rebuilt the brakes, swapped over the ebike levers from the izip and moved both shifters to the left side of the bar to leave the right hand free for the throttle. The taller gearing required a new chain and that pretty much finished up the bike mods.
I ordered a new 13 tooth drive gear for the motor from "gng ebike" to replace the stock 9 tooth gear. If I had been using the Izip I would have used a longer chain, but since I had to remount the motor anyway, I tried something different. I elongated the hole in the mount and cut another slot in the mount to line up with one of the unused disk brake mounting holes in the frame. Here is the modified bracket and new drive gear.

I added a reinforcing bracket to ensure it would no pull out from the torque. I also had to lengthen the adjustment rod for the chain tension.

It added a little more work but brought the motor closer to the wheel and saved a few dollars. Here is the finished drive assembly.

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Almost all my driving is done 1-5 miles at a time.
Best short trip: 2.4 l/100 km, 3.9 km
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