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It is pretty straight forward. Sprocket center level with the swing arm bolt center. 3.5-4" center to center. Make sure the rear wheel is straight in the swing arm, measure at the adjusters. Then use a straight edge from the rear sprocket to the new motor sprocket. Make sure the motor is level to the frame, side to side.

No I don't. But you can get one from Lithium-king.com and here is the page on the website. For the $149 he can build custom ones www.lithium-king.com/custom-motor-mounts-for-qs138-70h-v3

Thankyou sir!

Is the Universal for Full Size MX Bike, oe customized?

The easiest way is go to "Electricdirtriders.com" and start a Conversation with me. It works real well for pics, videos, and info. I'd be happy to help.

Thanks Casey I have done all of those except the Handlebar Pad. I will get one before I get on the track again. I had thought about that too.

We haven't ordered the battery Yet. TJ from Houston got his battery from ElectroandCompany.com It fit his 2003 450CRF. It is there 76V 21S12P 48ah battery 8.25" x 6.25" x 13" size. See his build at this location electricdirtriders.com/threads/starting-my-bike-build.3386/ We are talking with Amorge right now about a 20S13P battery the same size as above with Samsung 50S cells. 65AH and about the same price.

I had a Freeride battery with some bad cell groups. I took it apart and used some for for a KX100 electric 72V 20AH and I used the rest to make a 72V10AH, good for 100A. Send your requirements and size dimensions to Amorge They are the cheapest. info@amorge.com

It has been a fun build. These bikes are soooooo fun

I have only once tried Pouch cells. I have been using the 21700 cells now for a few years, and they perform quite well, and I am familiar with them. I don't see a lot of people like the Surron and Talaria Hi performance batteries, using the pouches. But mostly the 21700 cells. I can get a real 500A out a 20S12P and it will run a Amateur Moto, 6 laps like at Glen Helen, on about 50% battery. The complete bike weighs 240lbs. We also waterjet fuses for each cell built into the bus bar system.

@@dcoxryton fair points thanks, Id be keen to see these water jet cut fuses also what size battery would you recommend for single track 40km loops

@@nu77byte49 If you go to ElectricDirtRiders.com and start a conversation with me, I can post some pics of our battery builds. You can't post pics on here. I just did a 21mile single track ride, and I think I had another 5 miles of battery. That is with a 20S12P Molicel P42A cells. I built a 2017 KTM with a 20S16P Molicel P42A cells, and he has gotten 40 miles out of that on single track.

Is this my military Buddy. How are you doing?

We build the complete thing, You give me a good roller, and between $4000-5000, and I can build you one with a good Molicel or Samsung cells. Wired Off Road makes a kit also. And it starts at $4000 www.google.com/search?q=kx85+to+electric+conversion+kit&rlz=1C1CHBF_enUS1099US1099&oq=KX85+to+electrc&gs_lcrp=EgZjaHJvbWUqCQgCECEYChigATIGCAAQRRg5MgkIARAhGAoYoAEyCQgCECEYChigATIJCAMQIRgKGKABMgkIBBAhGAoYoAEyCQgFECEYChigATIGCAYQIRgKMgcIBxAhGJ8FMgcICBAhGJ8F0gEJMjEzNjFqMGo5qAIAsAIB&sourceid=chrome&ie=UTF-8#fpstate=ive&vld=cid:289590a7,vid:NqNx-hhz6ps,st:0

@@dcoxrytonI’m okay thanks…

This will be very similar to the 250 in power. It is really fun to ride. My YZ with this motor controller was as fast as the 350SXF we were riding with last week.

At the top you will have to do a little grinding at the top rear corners

This is just a Go Pro 7 .

I haven't built with that motor, the 90H, but if you are going to use the EM260S controller, you will end with the same horsepower , being limited by 40-450A at 72V. The 70H motor is 1" narrower. The 90H mess's with the rear brake pedal. Have you motor mount water jetted by Lithium-King.com. Just give him a few measurements, and he can make them out of any material ( Aluminum, Stainless, Titanium etc. He only does it for the QS138 70H V3 motor

@dcoxryton thanks Donald so I stick with 70H from a width point. They state the 70H is rated 3kw, do you know what kW or hp you getting from this motor with 260s and 72v batteries, I plan on getting Kenny at amorge batteries to make my power pack

@@davecarter34 With the Em260S, you can pump 400A to either motor. 72V times 400A = 28.8KW or about 38.4 HP. You will need a battery to supply 400A for a while. What bike you put it in determines how much battery. A 20S16P battery will give you about 40 miles of single track. A 20S20P is 25% more. Amorge is a good place to get your battery.

The battery will probably be a 20S12P Molicel P42A cells. This is good for about 10 laps on a moto track, i just got a 20 mile single track ride with about 5 miles left in that size battery. I am going to make it quick change at that size, but I could fit a 20S16P in the space.

Thanks. This guy has been riding this bike now for 2 years. and He loves it . I am now doing a 2022 KTM.

I would be glad to help, what do you need, It is hard to get you data on this reply forum. Go to Electricdirtriders.com and start a conversation with me Donald Cox. That way I can send you info and documents and pics. Tell me what type bike you are building and what type of riding you plan on doing.

@@dcoxryton thanks for replaying to me just started a conversation with you on there and told you my issues and my build. Thanks 👍🏼

Thanks TJ

He says that you can run this to 42 KW? We have only run it to 28KW, we have had no significant motor problems. He may be correct that it could withstand 42KW. Time for a bigger controller.

@@dcoxryton sotion fw04

I have not used a Fardriver. Don't know anything about them.

I don't use this throttle on the track bikes, because it is bulky, and we don't need the switches. But you are right this is a very smooth throttle. It works well for a street bike for all the controls.

The Motor and controller installation is pretty easy. The Battery space limits how big a battery you can put into it. The 2013 YZ250F was the last year of the early Aluminum frames. Space is limited to about 20S12P (50AH , good for about 25-30 mile of single track) The 2014 YZ250F opens up to a quick change battery, kind of like the Surron. A battery about the same size and range, it just can be swapped. There are some new batteries that can give you more range, but you lose on the Higher current and power, if that is what you want.

Top speed can vary, at the expense of low end power. 60-70MPH

Here is a rough estimate of a build. Motor and controller form China direct. $900, Motor and Controller kit from ElectroandCompany.com, $1500. There is value in E&C with there software and support, and an easy to put together kit. To do the work of putting a bike together I charge $1000-1500. a 20S12P battery for this bike is $2000-2500, battery charger and case. So you are right at what I am asking for the KTM and you could sell the Yamaha. I helped a guy in Utah with his build of a 2008 YZ450F, He got a bigger battery in it. 20S16P. Check out his build. electricdirtriders.com/threads/2008-yz450f-electric-conversion.3570/#post-38296

Thanks

They are fun, For your first, buy one and save a lot of expense and time.

@@dcoxryton buy the bike with no motor wouldn’t be the problem but everything else is expensive lol. The battery alone is $3500CAD. And the motor and controller is $1000CAD I believe. One day!

It works with the Votol controllers. It is the DN7 display. Here it is on Aliexpress www.aliexpress.us/item/3256805185654072.html?spm=a2g0o.order_list.order_list_main.164.349e1802n5jODj&gatewayAdapt=glo2usa

@@dcoxryton awesome!! Thank you

@@dcoxrytondo you have an instagram or another page you post your builds on ??

Hey good question Kyle. We have just done these same calculations. The Samsung cells will, or can give you 350 to 400A for short periods, according to people who have used them. But the Molicel P42A can do it with less heat. Cost is similar, but we find heat is a problem in summer riding and hard riding. We place the BMS outside the battery box, to keep it cooler for the charge cycle, we use the BMS for Charge only control, not Discharge control. The motor controller shuts the bike off at low voltage (slows down at 65 and shuts off at 59V).. If you are going to build a battery for endurance or longer running at lower currents, the Samsung are a better choice. but for harder riding and hotter conditions, the Molicel's are our choice.

@@dcoxryton I appreciate the response. Heat management isn't something I had considered. I've mostly been thinking about power density and weight.

His name is Bridger Hombreverde facebook.com/bridger.chase.9 Ask him more about it. His Instagram is "Desert and Iron"

It is supposed to be the breather for the oil in the Motor gearbox reduction. Some believe that it does not work, I believe that it does work and is necessary.

Lithium-Kimg.com built it for me. Give him a few simple measurement, ( but you must be accurate), and he will get them made for you.

I am not sure. This one is a EM260SGTP on the Honda. My YZ250F has the EM260SP/2 and it does 400A all day long without fault. I have used the new controller on quite a few bikes. They all run 400A just fine. Supposedly they can run at 500A, I haven't tried that yet, but when I get the final battery on this Honda I may try it.

@@dcoxryton The truth is that I have doubts... I think that the em260sp/2 has more response in phases around 800A and the GTP, if I'm not mistaken, only 600A in phases, which would be the same with an Em200Sp/2... anyway, in Sp is already discontinued and they only have the GTP. Very good constructions Donald!!

About 15 with the QS138 70H V3 motor. I have helped a couple other guys to build about another 15, and I built about 5 others with Motoenergy motors since about 2011. These new ones are so fun. I was dicing it out at Glen Helen last week with a young kid (69 year old, I am 79), on his new Stark. We were close in power, but no question he had more power on tap, and I was tapped out.

Emmaual, you haven't ridden an electric dirt bike, have you? We take mostly retired dirt bikes, like 2014 YZ250F and 2005 Honda CRF450, and 2023 CRF250 bike and convert them to electric power. It is a different power, and feel. I put an electric bike back on the track with electric and it puts smiles on peoples faces. They just add another element to the dirt bike riding experience

I think you will really like this kit. What bike are you putting this in? I have been riding this bike now for 18 months, and it is great. I have way over 500 laps on tracks on this bike plus miles of trail riding. Enjoy...

@@dcoxryton 2006 crf250r ' 1992 yz250 '2001 kx100. I am in the market for another battery for this kit pricey ' send a link of a substantial battery you recommend that puts the needed power . electro&co has a long waiting time .

The motor mounts are from Lithium-King.com Mine is a 450 2005 CRF They are $150. They need to be finessed once you get them. It is not a direct bolt in. There is no complete kit. I build the mounts for the controller in the airbox. A company in the UK sells kits. Here is their motor mounts mighte.co.uk/collections/mighte-sale/products/motor-mount?variant=45395131662633 Check out the rest of their site, they have complete kits.

13T- 50T 100-100 19" tire

I build them for customers. This one was $6700, it was his donor bike. He wanted certain things for controller cooling, and I split the battery for faster charging. I could build one for about $6000, you give me a donor. I have a 2008 KTM 250SX street legal, less than 20 miles on it, for $5500

It seems like you are in Arizona?@@dcoxryton

yes I am, Lake Havasu City, AZ Start a private conversation with me, Donald Cox on the Electricdirtriders.com forum. If you are in this area, you can try a bunch of different electrics. KX100, CRF150, YZ250F 2006, YZ250F 2014, KTM 2008 SX,YZ85, an Alta, a Zero DSR

The controller has a 400A fuse on it, and I have the master ON/OFF switch to disengage the battery from everything. I measure the current thru a 400A current hall sensor.