AG100

[Wally]

I have a Yamaha AG100 that needs an electric motor. I am wondering what is the best option: a pancake type motor, an enertec or maybe the hub monster from John in CR?

I am after a speed of around 80 kph but it needs good torque for climbing very steep tracks all day without having a meltdown.

Here are the bikes specs.





Can someone please give me their opinion?

I have been running a HS3540 with a crystalyte controller at 72V for the last couple of years. I now would like to move into a heavier bike.

 

[Alastor]

I think that a cromotor will be just fine for the things you like to run.Let me get this right you are running this motorcycle on the HS motor ? and it works ?

In my opinion if you want to go cheaper because the cromotor + controller + battery pack if you need to replace them can be expensive is to search on the web for a nice T configuration motor.And run your pack at 100Volts if its lipo and you can reconfigure it quick and inexpensive.

With a T motor on 100V you will go close to 70-75km/hour and because of the T configuration motor your hub will be cooler and will have more torque witch in your case is it will be a great improvement.

Do you have a video or picture of the bike with the HS motor please share i am interested in this kind of conversions.

 

[Bluefang]

John from CRs motors are pretty much the best you can buy in terms of cost vrs results, if you can live with a small rear wheel then the build I am doing is almost exactly what you are after cept mine will too out at just over 100kmh. If you want to keep a large rear wheel then cromotor or a entrac are easy options but midmounting one of johns mini monsters with venting like john suggests will get you as much power as you need and about 10% more range then the cro etc cheaper but more metal fabrication..

Where is Aus are you by the way?

 

[Wally]

The hs3540 is in a mtb. This AG100 is a new project and motor.

Will the cromotor handle such a heavy bike?
I like the mid mount idea as it sounds cheaper then an enertrac. Fabrication of mounts isn't a problem.
I wasn't sure if the mini monster would be as strong as a motor like a Mars.

 

[Alastor]

The hs3540 is in a mtb. This AG100 is a new project and motor.

Will the cromotor handle such a heavy bike?
I like the mid mount idea as it sounds cheaper then an enertrac. Fabrication of mounts isn't a problem.
I wasn't sure if the mini monster would be as strong as a motor like a Mars.

Ok i was confused lol.Mid mount will work better on a motorcycle that you need a chain drive to save a lot of customisation.It should be awesome if you could find a gearbox for that build as well so you can change easy from top speed to torque easy and more efficiently.

 

[Bluefang]

Well your stock engine does under 10hp? I was pushing 14kw into a mini monster with out a problem once I vented it. Try searching johns recent posts about venting a hub monster if you do the same on the mini while running 100+V you could keep the switching mechanism and push 10kw with a 2speed setting too.

Mini has the potential to slaughter the mars, just different packaging.

 

[Wally]

I have just found a guy in Australia that has a few brand new Agni 95R motors for sale for $1390. If anyone else is interested, let me know. I'm going to put a post in the for sale section for him.

I am getting ready to buy a motor and I'm torn between one of the Agni's, or a ME0913. Any suggestions??

 

[Wally]

Here is the link for the Agni motors for sale in Australia. http://www.gumtree.com.au/s-ad/cher...lectric-motor-agni-95r-below-cost-/1019332463

I have just ordered mine. Hope this helps someone out.

 

[neptronix]

A very typical motor to use is these:

http://www.electricmotorsport.com/store/ems_ev_parts_motors.php

Excellent bang/buck ratio.

A 36FET 4110 greentime controller would be good for pushing the brushless ones hard.

 

[Wally]

Gday Neptronix,

Thanks for your input. I had been looking hard at those motors at an Aussie site called EV Works.

I just come across the Agni motors at the last minute and thought the 5 kg less in weight compared to the ME motors could go into my battery bank. I may be just crazy enough to first try it in my mtb as a mid mount, after a few mods and tuned down a fair bit.

 

[Wally]

12 months later and I have an ME1003 and an Alltrax SPM72400 in the AG100. I have been using my RC lipo from the mountain bike. They are about 3 year old 12 x 6S 5Ah Turnigy 25-35C and a couple of batteries are letting the team down.

I need help choosing new rc lipo batteries. The pack is going to be made from 5S batteries for 74V nom. with around 40 Ah capacity.

I have been searching Hobbyking for some 5S 5Ah nanotech, but they dont have enough of what I want in stock. I could go with the Aspec nano's but they are about $116 each.

Someone said I could use cheap Zippy 5S 8Ah and just get enough capacity to counteract the voltage sag I would get. Being around half the price, it may be okay to use them and change again in a couple of years.

Could anybody suggest using either Zippy, Turnigy or hold out for the nanotechs? Any advice appreciated.

 

[jonescg]

Hi Wally,
If you want a high capacity battery using LiPo, I can build a 5p pack using the 40C LiPo cells. This is a 14s pack I built for someone in Adelaide:



Now 25 Ah is as big as I can go using LiPo. Any larger, I would really recommend you go with a larger format cell, say 20 Ah cells. In fact I have a 40 Ah board for EIG cells, but these are not cheap. Highest quality pouch cell you can get though. Such a pack would be 20s,2p or 40 cells all up. You're looking at about $3,500 worth of cells, but that's 3 kWh in a package weighing only 17 kg.

 

[Wally]

That's one sexy battery. You have been doing some great work on and off the track.

 

[Wally]

$3500, that's interesting. Is that for a built pack, ready to go? I'll check my battery box measurements.

 

[jonescg]

$3500, that's interesting. Is that for a built pack, ready to go? I'll check my battery box measurements.

Well that's an estimate based on cell prices. Air freighted cells from Korea will cost about $90 a cell landed, after GST and customs. There's a bit more in water jet cut copper busbars, and another hundred bucks in a nice solid enclosure for them, but if you put $4k aside you would be pretty safe. These are the termination boards I have made up - ready to go:


I have 3p boards (60 Ah) with busbars too:


Makes for a neat pack which just needs a snug enclosure. I'd recommend doing something clever about the pouch edges though - they are a rather fragile part of the pouch and need to be inside a tray (as per manufacturer's system) or just filled up with silicon goo.

 

[Wally]

I have attached some drawings for dimensions and a couple of photos to help size it up. Let me know what we can fit in these, so we can work out how much bigger they need to be.