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Motorcycle with a Sidecar Conversion

4089 Views 11 Replies 6 Participants Last post by  zapyourrideguy
Similar to a few others here, I am planning a motorcycle with a sidecar conversion to an EV. I am still in the early stages and looking for a bike. I'm trying to plan out what all I will need.
So far, here are the specs I have considered:
Total vehicle weight: 1,100 lbs (fully loaded with 1-2 riders)
Desired max speed: 70 mph
Desired range: 50 miles ( I commute 25 miles each way, but my boss has said the company will provide me a way to charge it here)

Based on that, I am thinking about a 72V, 100 Ah setup. What size motor should I be looking for? The stock Urals weigh 750 lbs unloaded and have a 42 HP motor so I was thinking that I want at least 50 HP.

I would like to stay under $5k for the project. I will be doing all of the wrenching and wiring myself. I am a mechanical engineer with a lot of fabrication and machining experience. I also work with a few EEs that have offered to help once I get into more of the wiring and programming aspects.

Thanks for the help!
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Rather considering the ICE's peak power and the motor's continuous rated output, consider your ICE's power curve.

When accelerating, your power would be lower just after a gear change and highest near your shift point, which probably isn't at redline. Look at the power output in the middle of that revband. This may give you a more realistic ballpark for your motor spec.
 

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Discussion Starter · #3 ·
Rather considering the ICE's peak power and the motor's continuous rated output, consider your ICE's power curve.

When accelerating, your power would be lower just after a gear change and highest near your shift point, which probably isn't at redline. Look at the power output in the middle of that revband. This may give you a more realistic ballpark for your motor spec.
That's a good point. Just out of curiosity, what size motor would output about 50 HP anyway? I'll have to look and see if I can find a power curve for the Ural's 750cc. If not, I don't see a problem with having a bit more power because I know with all the batteries and all this thing will probably be HEAVY.
 

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I have the Dnepnr with the ME 1003. I will be transitioning to an AC-30.
The little ME 1003 performs pretty well. Just a note, it may be my bike (older '83 MT-16) but I wouldn't want to go anywhere near 70 mph on it. 45 to 50 seems scary enough. The newer Ural's may be more refined machines but sidecar dynamics may be a limiting factor as far as speed.
 

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I have an 89 mt16 dnepr and was think of going electric. Can you share how you did yours

[Edited by Mod, I think this is what he meant to do]
my Dnepr is finally in the finishing stages with AC-30 (an older version of AC-35) and 1238-6501 controller
It was direct drive and did ok, but I put in a 2:1 reduction using gates synchronous belt. It now goes as fast as I would want to go on this bike. The AC-30 motor plate states 35 hp max 10 hp continuous. its geared to go about 50mph.
 

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my Dnepr is finally in the finishing stages with AC-30 (an older version of AC-35) and 1238-6501 controller
It was direct drive and did ok, but I put in a 2:1 reduction using gates synchronous belt. It now goes as fast as I would want to go on this bike. The AC-30 motor plate states 35 hp max 10 hp continuous. its geared to go about 50mph.
Do you have any pictures of the reduction belt drive you came up with?
 

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Hi!
I have inherited a 1994 Ural and have started the project to convert it to electric. I have access to this motor and these batteries plus this controller. These are used, but condition should be good for the price.
I am curious about many things, but for now the question is whether the gearbox can be removed. There is a reduction gear in the final drive, but my documentation doesn't contain any figures. Any ideas what that might be?
@zapyourrideguy, what is the gearing in your reduction belt drive? Indeed, it would be great to get a picture of the implementation.
 

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Gates synchronous belt and sprockets
Here is shots It is exactly 2:1. My dnepr final drive is 4.6:1 which I believe would be similar to ural. Top speed is low 50-55 but hill climbing is really good. And bike accelerates briskly. But If the transmission fits I would tend to keep it for the flexibility.

it.
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