i bought two48v500w kits from yescomusa

[luvxu]

i bought two48v500w kits from yescomusa to build an ebike for my dad and wife. in the first kit the battery charger did not work so i asked yescomusa if he could send me a48v led head light instead which he did. i was hesitant between choosing a 1000w kit and a 500w kit and finally decided to go with the500w for fear that my 48v 10ah is not able to provide enough juice for the 1000w kit. so now i kept on wondering how much faster (and more fun) it would be if i had chosen the1000w kit instead?

the installation was very easy for me. i installed the first kit on a trek 3700 and the second on an iron horse outlaw bike. they work perfectly and i didn't have to do any modification.

in term of performance the top speed without pedalling on flat surface is about 25mph. i have a busettii vortex and i used it to race around the neighborhood playground with my son who was on the 500w kit bike and he beat me every time. he done it without pedalling while i pedaled hard. i am about40 lbs more heavy than my son as i also have my daughter on the back seat with me.

about yescomusa he is really a wonderful ebayer. he helped me several times with information about the kits before and after the purchase. i felt very comfortable dealing with him . i only wish that he would carry more powerful kits so that i could buy more from him. i felt25mph is still too slow and wouldn't mind joining that exclusive 40-60 mph club

(moderator edit: moved this review out of someone else's review thread)

[wesnewell]

They carry a 48V 1000W kit that has a 470rpm rating compared to the 360 or 380rpm rating for the 48V 500W model. So about 25% more speed at the same voltage. You'd really be pushing that 500W motor to hit 40 mph. In fact, I doubt you could. I run the 1000W motor on 24s lipo (100v charged) and can just get over 40 mph with it. Although the fact I'm 270 lbs may have something to do with that. Their controllers will only support 30A up to 63V max, so if you want to go higher, you'll need a new controller.

[luvxu]

would you know about the amp and voltage range of their controller for the 1000W hub?

One thing about these kits is that it doesn't mention much technical information or made of the products except that it is 48V and 500W or 1000W kind. Looking at the controller's connectors I don't see there is any thing that can be connected to a cycle analyst or to enable regenerative braking so I assume that the controller is not designed for those features. I wonder if it is possible to use a higher voltage battery (like 72v) to get a little more speed out of the hub?

Does any one know about the top speed of the 1000W kit and how does it fair in hill climbing power?

[wesnewell]

They are basically the same 30A with 63V caps and 75V fets, although the one with the 1000W kits has 15 fets compared to 12 for the 500W kit. I modded one of the 500W controllers to 42A over a year ago and it's still working. Gives more power, but no more speed, as to be expected. I use 15 fet 72V 40A controllers with 100V caps and fets. Had to add a resistor to get regen working at 100V and up the LVC, but works fine on 24s lipo.

[Blackssr]

would you know about the amp and voltage range of their controller for the 1000W hub?

One thing about these kits is that it doesn't mention much technical information or made of the products except that it is 48V and 500W or 1000W kind. Looking at the controller's connectors I don't see there is any thing that can be connected to a cycle analyst or to enable regenerative braking so I assume that the controller is not designed for those features. I wonder if it is possible to use a higher voltage battery (like 72v) to get a little more speed out of the hub?

Does any one know about the top speed of the 1000W kit and how does it fair in hill climbing power?

I have the 1000 Watt kit on a EV Global Ebike with 14s3p lipo (15ah). My first custom. I am in Florida, so no hills here, but I do get 34 mph on level ground. I go about 20-24 miles on a charge. I kept the lipo at 14s3p so that I can bulk charge on the 1420i net 3 without breaking down the pack. I would speculate that 40 mph would be obtainable on 72 volts but that would require a new contoller and more complex charging.

[luvxu]

hi wesnewell
would you be able to share some photos on how the controller was modified? How much the parts cost you? I would do the mod for the fun of it if it doesn't cost too much. I am interested in having regen on the controller but I have no idea how to do it. Lately I have been thinking about buying the magic pie for my trek 4300 in order to get to that 40mph but that is a lot more cost compared to the 1000w kit from yescomusa. I am not sure if the magic is worth the investment or should I just buy the 1000w and try to make some modification to the controller like what you have done to get the extra power.
Thank you.

[snellemin]

I have the 48v 500w yescom motor and the magic pie motor. The magic pie stays cooler and has more torque with the right controller(more amps). The magic pie is around the same kv as the yescom motor.

I just purchased a 6fet sensorless controller from Lyen to run the 48v 500w motor on 18s2p A123. That 6 fet is so small compared to the 12fet yescom controller.

[wesnewell]

hi wesnewell
would you be able to share some photos on how the controller was modified? How much the parts cost you? I would do the mod for the fun of it if it doesn't cost too much. I am interested in having regen on the controller but I have no idea how to do it. Lately I have been thinking about buying the magic pie for my trek 4300 in order to get to that 40mph but that is a lot more cost compared to the 1000w kit from yescomusa. I am not sure if the magic is worth the investment or should I just buy the 1000w and try to make some modification to the controller like what you have done to get the extra power.
Thank you.

Which controller are you talking about? Which mod are you talking about? I've modded several different ones for several different things. Shunt mod is the same for all of them. Reduce the resistance of the shunt by adding wire and/or solder to increase amp output. The other mods are controller specific. There's really no cost to do any of the mods. Just a matter of a little wire and solder and maybe a connector.

[mark5]

luvxu, Here's some links to other's previous posts with pictures about controller shunt mods

John in CR using copper wire:
Modifying a shunt with controlled results
http://endless-sphere.com/forums/viewtopic.php?f=2&t=31643
bigmoose variable shunt
http://endless-sphere.com/forums/viewtopic.php?f=2&t=31643&start=15#p494761
Easy and more accurate shunt modding
http://endless-sphere.com/forums/viewtopic.php?f=2&t=25802

neptronix solder-only mod
Re: Shunt Mods
http://www.endless-sphere.com/forums/viewtopic.php?f=8&t=34356#p499958

[luvxu]

guys
thank you very much for the pictures and link info. They are very helpful to a newbie like me. In the last few days I have dusted off my electric circuit book from college days to read on shunt resistor and all that. It gave me a little bit more of an understanding of what you were talking about here. The shunt mod seems to be easy enough, I think I can give it a try and see how it goes. Someone was talking about the FET mod, is that means you also replace the lower power FETs for a more powerful ones so that you can drive more current into the motor?

Coming back to my original goal of joining the 40-60mph club. Would you have a suggestion on these choices:
1. buy yescomusa 1000W kit and modify the controller (shunt and fets) to pump more current to the motor. Is there a big risk here? What is the voltage/current that I can go up to?
2. buy the magic pie 3 kits. Can their internal controller be modified? If I buy the controller from Lyen, will it be easily connected to the magic pie? and what do you do with the magic pie's internal controller then?

I consider myself frugal but not cheap, so if it makes sense to spend a little more for quality then I will do it. Any of your advise will be much appreciated. Also please keep in mind that the bike that I will use for this project is trek 4300.

[wesnewell]

The 1000W motor (rated at 470rpm@48V) is capable of over 40mph, but not with the stock controller and voltage. It will cost more to modify the controller for 100V than it will cost to buy a new controller capable of 100V. It will do no good speed wise to increase the amp output with a shunt mod. That will just increase acceleration to top speed.
The MP3 motor is high torque, low speed, rated at 380rpm@48V, so will need more voltage to reach the same speed as the 1000W motor. It's best suited for lower speeds with faster acceleration.
The controller I use cost $35 shipped from china and is capable of 100V. Price for it has gone up since I bought the ones I have, but it's a solid controller that I've been using for a year. Whichever controller you choose, make sure it capable of 100V with 100V caps and fets. Prices can vary greatly up to hundreds of $. IMO, just a waste to spend more than needed.

[snellemin]

When you decide to get the Magic Pie, choose the one build for the external controller. The Pie is a torque monster vs the Yescom motor, but needs more voltage to go faster like Wesnewell said.

I don't need a spacer between the motor and freewheel on the Pie, like I do with the Yescom motor when I went with the DNP 11T freewheel.
I don't need a freewheel spacer on the Yescom motor, when I flip the freewheel on the opposite side of the motor.

The Pie is a better finished product vs the Yescom, but comes at a higher price.
Controllers is up to you really. Buy something like Wesnewell has or something from vendors found on this forum.