MXUS 3000 Hub Motor - V1 V2 V3

[Samd]

Must be the adappt.

It seems that the indefinite rate I get is about 1800 watts up a 10 degree incline for an hour before the simulator starts to tip down from "overheat = never' to about an hour at full throttle. Reflects my rough experience.

 

[markz]

What washers go where, I have one set of washers that are like 10mm and another set that are like 15mm.
Its just a matter of where they go. I think my 10mm are in the right place on the brake side, for the cover and the covers bearing.

If someone has it open, or knows, it would be good for me to put them in the right place.

What type/kind of silicone should I use on the axle at the stator?
I got some of this stuff, Permatex High Temp Gasket Maker "For high temprature Applications. Gasket and Sealant 343C 650F.
Should work right.

 

[Rix]

These 3T motor can apparently take multiple 19.5kW burst no prob!

"19.5KW burst no prob" Damn Doc, you act like that aint nothing. Got be fun!

 

[Doctorbass]

These 3T motor can apparently take multiple 19.5kW burst no prob!

"19.5KW burst no prob" Damn Doc, you act like that aint nothing. Got be fun!

Infact acceleration AND POWERBAND are very impressive!

 

[Rix]

These 3T motor can apparently take multiple 19.5kW burst no prob!

"19.5KW burst no prob" Damn Doc, you act like that aint nothing. Got be fun!

Infact acceleration AND POWERBAND are very impressive!

I figured as much. Of course, Doc Bass don't ride slow merd EV's :lol: So that goes without saying.

 

[teslanv]

1500W constant is what the motor is rated for really. It will never sustain 3000W during a long time.

It is my experience that if paired with the proper tire size and voltage, the MXUS motors can definitely handle 3000W continuous.

My 3T in a 21.5" tire can do this, as can the 4T in a 24" diameter tire.



It's all about maximizing the efficiency with a smaller tire, and keeping phase amps within the reasonable limits.

 

[markz]

OK I am about to hit up the used bike shop, I have a 5spd and a 6spd used freewheels.
I will pick up a 8 and 9 speed Rapid Fire Plus shifters because they are cheap.
I already have Shimano shifters that are 9 speed. My grip shift is 7 speed, which I think is indexed and not friction, cuz it says 7 on the shifter. But it clicks so I dunno.

Who is using freewheel cassettes and what speeds are they, Who is using single speed rear freewheel and what tooth count is it?
Smaller Tooth Count = Slower
Larger Tooth Count = Faster

I am about to put in a huge order at Niagara Cycle, couple hundred bucks worth. So i figured I'd buy a single speed freewheel.
So what are people using for single speed on their MXUS 3000W?
What is a good middle ground, knowing full well this motor is not pedallable with no power to the motor. I ran out of battery juice and its a bummer riding home. It'd be nice to have something where I am in the high efficiency zone most of the time while cruising at 35kph (20mph). And I am not a speed demon, so 50kph (30mph) max (speeding up for hills, keeping up with traffic), I'd do high speeds (60kph max) once on a ride for about a km (0.6miles). But I'd be impressed with something that can give me hill climbing ability. We are talking 15-25% for 5-10 minutes with run ups.

 

[Samd]

Same here. No use for gears.

 

[Rix]

OK I am about to hit up the used bike shop, I have a 5spd and a 6spd used freewheels.
I will pick up a 8 and 9 speed Rapid Fire Plus shifters because they are cheap.
I already have Shimano shifters that are 9 speed. My grip shift is 7 speed.

Who is using freewheel cassettes and what speeds are they, Who is using single speed rear freewheel and what tooth count is it?
Smaller Tooth Count = Slower
Larger Tooth Count = Faster

I am about to put in a huge order at Niagara Cycle, couple hundred bucks worth. So i figured I'd buy a single speed freewheel.
So what are people using for single speed on their MXUS 3000W?
What is a good middle ground, knowing full well this motor is not pedallable with no power to the motor. I ran out of battery juice and its a bummer riding home. It'd be nice to have something where I am in the high efficiency zone most of the time while cruising at 35kph (20mph). And I am not a speed demon, so 50kph (30mph) max (speeding up for hills, keeping up with traffic), I'd do high speeds (60kph max) once on a ride for about a km (0.6miles). But I'd be impressed with something that can give me hill climbing ability. We are talking 15-25% for 5-10 minutes with run ups.

Mark, where are you getting an 8 speed shimano shifter from? Is it set up for an 8spd 40mm freewheel? I got a sweet 12x34 8spd freewheel, its rare, and I haven't considered using it because I can find an 8spd shifter. Hell I don't even know what shift ratio I need, I am thinking index with 2-1 rise. But I am guessing. That said. Sam and Tesla NV recommendations are sweet. Ebikes just don't need a lot of gears, my homebuilt is running a 17t on the rear and a dual chain ring up front, 36 and 48t. I would probably go down to a 16t on the rear. The 36/16t combo is excellent offroad for pedal assist during hill climbs, the 48/16t is good on road for comfortably pedal assisting at 20MPH. The schlump is very sweet for this reason. Your over drive is for road work, you direct drive is for offroad work.

 

[markz]

I'm hitting up the used bike store, so its just bikes people have that they dont want and they "donate" to store, so they can turn around and sell.

I think a 9 speed shifter would work on 8 rd. I Just read that on Sheldon Browns website.
9 & 7 spd chain too would work on 8 rd. But I'd have to reread that website.

Would a flip-flop single speed freewheel work on our MXUS motors?
Flip-flop are the track bikes, used on hubs that you flip the wheel and it changes the tooth count on single speed bikes. I've only ever seen one, a dumped bike in front of his apt building.

The singles I've seen on Niagara Cycle website is 14, 15, 16 and up. $5 and up.

 

[Rix]

I'm hitting up the used bike store, so its just bikes people have that they dont want and they "donate" to store, so they can turn around and sell.

I think a 9 speed shifter would work on 8 rd. I Just read that on Sheldon Browns website.
9 & 7 spd chain too would work on 8 rd. But I'd have to reread that website.

Would a flip-flop single speed freewheel work on our MXUS motors?
Flip-flop are the track bikes, used on hubs that you flip the wheel and it changes the tooth count on single speed bikes. I've only ever seen one, a dumped bike in front of his apt building.

The singles I've seen on Niagara Cycle website is 14, 15, 16 and up. $5 and up.

I will check Sheldon out. The flip flop hubs I have seen wouldn't work on the MXUS as the wheel is removed, turned 180, and remounted. Flip flop hubs don't have disk brakes and phase wires. I had a Fixie that had a flip flop hub, one side was a fixed gear 16t, the other side was a 16t freewheel.

 

[madin88]

1500W constant is what the motor is rated for really. It will never sustain 3000W during a long time.

It is my experience that if paired with the proper tire size and voltage, the MXUS motors can definitely handle 3000W continuous.

My 3T in a 21.5" tire can do this, as can the 4T in a 24" diameter tire.



It's all about maximizing the efficiency with a smaller tire, and keeping phase amps within the reasonable limits.

I have exactly the same setup. YES, 3T in 22" wheel and 4T in 24" and can say the same from experience.
The MXUS in 24" wheel can take 3kW continuous. The 3T in the smaller wheel probably 4kW + because of its additionally higher rpm (-> better cooling) at given speed..
It's all about phase amps.

@ marks

i use the Shimano 16T freewheel for narrow chain. In comparison to stock mxus freewheel, dicta brand or 60USD high quality flux&fly type, the shimano makes the lowest noise or better say it makes NO noise. Yes, it is almost not noticeable.

 

[markz]

Why can't I attach my assortment of freewheels to the mxus motor?
I had a freewheel on there before and rode it. Am I missing something on the motor. The freewheels threads are bigger then the threads on the mxus.

------------------------------
edit:

Why? Because the freewheel internals have broken off from the gears themselves. Freewheel internals are still attached to the cover plate. A tool like this http://www.goldenmotor.ca/categories/Parts-and-Accessories/Freewheel/ or a regular tool thats been modified so the axle can slip through is needed. Its funny how I happened to pick a black freewheel, it looks like it belongs there doesnt it. Too funny.

Lesson Learned: Have the proper tools. Google how to remove a freewheel.

 

[Rix]

Why can't I attach my assortment of freewheels to the mxus motor?
I had a freewheel on there before and rode it. Am I missing something on the motor. The freewheels threads are bigger then the threads on the mxus.

now I am going to have to check mine and see if the threads are designed for a BMX freewheel vs a Single Speed MTB free wheel.

 

[markz]

Rix, dont worry about it my freewheel broke off onto the coverplate. I got the internals off, and installed a used 7spd Shimano Mega Range 14-34T, before I had a 5spd and it would jump off the big gear and jam between the freewheel and the cover plate because I had a 7spd grip shift. I will see how it is, then when I made up my mind I will buy a new one. eBay has a ton of single speed freewheels from 12-20T for cheap! with free delivery we are talking $5 shipped but it takes 14-28days. I just dont want to spend the extra coin on a single speed chain.

My Filzer freewheel tool doesnt fit over the axle, so I took the cover plate off, got a piece of wood and screwed the cover plate onto the wood with a long wrench and it came right off. I am back in business, until the next hiccup.

 

[markz]

Is there anything wrong with using washers to bring the disc out more on the motor? Its not much.

Also, as mine is now, my smallest gear on the rear freewheel wont clear the frame, so can I also use washers to bring the frame out for chain clearence?

What about making my own disc brake mount, using the old one. Going from 160 to 203, I think I can line it up sideways, but need the extra height, a simple metal bar with holes drilled to clear maybe 7mm in height.

-----------

Using 5 washers to bring the disc out, now the bolt heads are hitting cables.
Back to store to look for M5 x 12mm flat flush head.

 

[Rix]

Is there anything wrong with using washers to bring the disc out more on the motor? Its not much

No, I have done that on all of my bikes.

 

[Rix]

Here is a pic of an 8", 9" and a 10+" MTB rotors. The reason I can get away with mechanical calipers is using a much larger rotor.

 

[macribs]

Hm those 9" and 10" rotors are hard to come by. To get a 9" rotor I ended up going with a Hope mono 6 ti kit.
Searched several stores for larger then 203 mm rotors but those where all out of stock and consensus was that those larger rotors was out of production.
I got one spare 9" hope rotor, where can I score more? Who are still making those?

 

[efMX Trials Electric Freeride]

Hayes 9” 224mm disc brake rotors :
http://recycledmountainracing.com/products/2x-hayes-9-224mm-disc-brake-rotors-motoped

 

[Allex]

255mm
https://endless-sphere.com/forums/viewtopic.php?f=31&t=69575&p=1116828#p1116631

 

[korpin]

I am having a bike built with MXUS version 2 4T with adappto midi and 85 volts nominal battery probably topping out to 98 volts...any idea of what speeds I can expect with 26" wheel WITHOUT using OVS?

 

[korpin]

That is a great question. According the numbers, 5-8% more could be flowed, but I'm guessing. Smarter people than I will need to chime if for the exact official specs.

The 3T can take the most current, because it has the most strands in parallel and the lowest resistance.[/quote]

The question Was about current, not torque output. Strictly speaking, the 3T motor can take the most phase current because it will always have more parallel strands of copper, and lower resistance than a 4T or 5T or 6T winding. As for overall torque output, that would be whichever motor has the highest copper fill, if the 4T does in fact have 16 strands in parallel, then it is the most efficient motor of the bunch.

just wanted to add my 2 cents in...does not the SIZE of strands matter too since current (I thought) only runs on outside of wire?...my motor IS a 4T the guy at Kinnaye motorsports recommended that version for me so I hope you guys are correct!

 

[Samd]

I am having a bike built with MXUS version 2 4T with adappto midi and 85 volts nominal battery probably topping out to 98 volts...any idea of what speeds I can expect with 26" wheel WITHOUT using OVS?

Pop it in the simulator, I'm assuming maybe 60 amps.

 

[korpin]

damm hope thats wrong samd....one guy told me he was going faster than that with 72 volts system
this is what allex said: "on 74v nominal I get 70km/h and over 100km/h with OVS enabled on maxus 4t"

checked video normal battery amps set at 65...OVS 156 amps

https://www.youtube.com/watch?v=XybF15eNKtI