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Extreme DC! Extreme Electric Golf Carts!



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Unread 02-26-2010, 09:48 AM   #11
Not Yet Wild
 
Join Date: Feb 2010
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Default Re: What motor to buy for a motorcycle project.

Quote:
Originally Posted by GarageBuilt View Post
Most of the electric bike guys use a 72-volt pancake motor .
Yep, I know, I looked at those, the most common is the Etek motor, 6hp with a peek of 15hp permanent magnet motor that cost $450 new and pretty close to that used, they also tend to be abused by people as they are under powered for a motorcycle, motorcycles that use them tend to top out at 45mph.
The other one that is common is the Perm PMG 132 motor, that is 6hp with a peek of 15hp and costs over $1,000.
From what I've seen and read, I don't want a permanent magnet as they don't have the peek performance I'm looking for, if/when I do go to 72 volts I can get a 19 spline 72 volt motor from a GEM car, or from D&D and it will bolt right up, 4 bolts, 4 cables and I can swap motors.
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Unread 03-01-2010, 09:57 AM   #12
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Join Date: Feb 2010
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Default Re: What motor to buy for a motorcycle project.

A friend of mine who is in need of money offered to sell me his 48 volt 20 amp hour Foxx Power lithium battery with two chargers, it's a 3c battery so it can handle 60 amp draw and over 100 amps for 15 seconds, my gut says that is a bit low, but it's $300 with two years left on the warranty, this was a $1,000 battery pack a year ago.
The EZ-Go motor is 36 volts and from what I've read is 2hp, 2hp at 48v is 31amps... I would like to go with a larger battery, but should I get this and try it out, or is it way undersized?
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Unread 03-03-2010, 08:04 PM   #13
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Default Re: What motor to buy for a motorcycle project.

You mentioned early on a trailer for the batteries? I would look closely at the total weight of your battery pack in relation to stopping that mass once in motion. Newtons Law, not mine!
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Unread 03-03-2010, 09:58 PM   #14
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Default Re: What motor to buy for a motorcycle project.

that is why I'm starting with a heavy bike that was offered with a full faring option that added 200 pounds and trailer hitches were an option, the total weight will not be that far off from what people tour with and I always put good tires on my bikes, after all you only have 2.
The Foxx Power battery deal is a no-go for now, but if summer work is as good as the bids are sounding then I'll pick up a new lithium battery that is sized better for a bike.
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Unread 03-08-2010, 09:33 PM   #15
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Default Re: What motor to buy for a motorcycle project.

I've done a few redesigns on adapter plates and mounts for the motor and now have a design that should work, first half of the adapter has been milled, in the morning I'll pick it up and do a test fit.
A 3/4" thick aluminum plate bolts to the face of the motor, this place is this thickness to allow a bearing to be pressed in to it, another piece of aluminum is then bolted to that face plate, it is a 1" thick block and is milled out to hold a bearing as well, this 2nd block also bolts to the motor cycle frame in the same way the engine was bolted on.
I still have to make the splined shaft, but that will be soon, if anyone would like to make an electric motorcycle based of a Honda CX500 it's still going to be a while but hopefully by this summer I'll have something that others can buy, most likely at a reduced price as I would be asking the to help me test the idea and work bugs out.
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Unread 06-25-2013, 07:28 PM   #16
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Default Re: What motor to buy for a motorcycle project.

Just in case anyone cares, or finds this thread later, here is what has happened with this project 3 years later!

my 2.5hp EZ-Go motor works great on my motorcycle! I tried using T105 golf cart batteries and it was heavy 36v of batteries was 400 pounds on the motorcycle frame, handling was lousy, braking was lousy and I could only get up to 40mph!
Switched to lithium batteries, 112 pounds of batteries at 48v and I'm very happy! bike is 40 pounds under stock weight and using an Alltrax 4834 NPX speed controller works ok but it has the soft start of a golf cart so I'm shopping around for a replacement, even with the soft start tho the bike is fun to ride, the motor gives plenty of power, drawing 120amp once up to speed and 200+ amps under heavy acceleration, giving me a 60-65mph top speed!

Next step is to add motor cooling, I have a tiny squirrel cage fan that produces a decent amount of pressure and air flow that I plan to use to force cool the motor.

I ended up with a 100 amp hour, 48v lithium battery pack from GBS, out of pocket cost for the cells was around $1,800, twice the cost of lead but 1/5th the weight and they take up 1/3 the space with 5 to 10 times the life!
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Unread 07-02-2013, 02:34 PM   #17
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Default Re: What motor to buy for a motorcycle project.

I) got to tell you, we would LOVE to see some pictures of the bike!
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Unread 07-02-2013, 11:53 PM   #18
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Default Re: What motor to buy for a motorcycle project.

My friend Ben has a blog and took photos of my motorcycle along with photo of the splined shaft that I made to couple the EZ-go motor to the Honda drive shaft.

http://300mpg.org/2013/06/25/mrea-energy-fair/

I also added it to EValbum.com and just this evening it showed up on the site.

http://www.evalbum.com/preview.php?vid=4686

As I make improvements and changes I'll do my best to update the EValbum.com listing.

Over the weekend I swapped the electric drive train to a motorcycle that was in much better shape, took about two hours from start to finish to pull the engine, pull the electric drive and bolt the electric drive in to the new motorcycle and ride it down the road!

I'm also looking for an Alltrax AXE 4844 if anyone has a use one in good shape that they would like to sell me, otherwise there seems to be a few of them on Ebay for around $340.
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