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The 70H has produced enough power and is a little narrower. The brake pedal has to be adjusted to work on most bikes now. The 90H is wider, and heavier, and you can't have a brake pedal. YZ-EMX conversion with the same 70H motor claims 45-48HP. That is enough for me. To get more power you need bigger battery, and now you are even heavier. There is another motor we are thinking about, the Sotion GTS35, watercooled and 60HP, with a EBMX X-9000 controller, and that will need more battery.

@dcoxryton very interesting information thanks a lot ! How much does your sx weights with the 70h and 4.8kw battery ? I ready everywhere that eMoto feel lighter than thermic for a given weight, do you feel the same about that ?

@@gg4760-k5n I don't have pictures of the weight.(I usually take pictures of the scales) But I think it was 242, or 245lbs.

@@dcoxryton how did it feel compared to the 150sx with its normal engine ? Weights are pretty comparable and small 2strokes are already pretty nimble compared to 4 strokes.

I think that is what it is called, Upper Ranch, also it is near the 4 Wheeled Vehicle area. It is not always open for open riding

I can't speak for the QS138 90H, since I have not used one of these. We exclusively use the QS138 70H V3, and they have held up quite well. On the old model of the QS138 70H V3 we had lost a few output shaft bearings, and spun the gear on the output shaft, but the broken cases you saw were probably having the chain too tight. ( Very damaging on dirt bikes) We do not use the QS138 90H motor, because it is too wide to fit in most models of current and newer dirt bikes. It looks like a very robust motor.

That is a great choice to build. The frame is a little wider on the bottom tubes, so the mounts lines up real easy. I have a pretty complete mount kit for that model. Go to ElectricDirtRiders.com , Log on to the forum, and start a conversation with me ( click on the little envelope near your name, that will start a private conversation, and I can share a bunch of pictures and info

Yes, I'd be glad to help yo build one. What year and model ae you starting with. Go to ElectriDirtRiders.com. log on to the forum, and start a Conversation with me DonCox ( the picture of the envelop next to your name starts a conversation)

The motor we have been using in Moto bikes is the QS138 70H V3 with an Votol EM260S . A 72V nominal battery about 50AH is good for your moto. But it wouldn't do 4 motos without a battery change or recharge. . The Quad could hold a bigger battery, about twice the size, 72V 100Ah . Message me and I could give you more information. Or go to ElectricDirtRiders.com, log on to the site and start a Conversation with me. We can post a bunch of material there. My name or that site is DonCox

That motor is a little underpowered. We put the QS 138 70H V3 in the KX85-100, YZ85, RM85 etc with the Votol EM150SP/2 controller. A 20S8P ( Lishen 21700 cells as a minimum )battery will give you good performance

​@@dcoxryton Yep, thats the motor my brother got. I might have to look for a slightly lighter frame in retrospect. Thank you for the reply my friend. Enjoy the sick build, looking really proper.

Thanks, I didn't put any graphics on it so they can choose.

Thanks

All 3 are important factors. With the long travel suspension, if you have it exactly where the original sprocket, that is the best. We strive for that, but the motor case, swing arms, and gap in the swing arm become important. But we end up real close.

I cannot post any thing on here, but if you go to ElectridirtRiders.com, Log in, and start a Conversation ( it is the little envelop symbol ) with me DonCox, and I can give you a working tune.

Amorge info@amorge.com They are very responsive, and can build what you need. But always select Air Shipment, and it will still be a long wait.

Tbf he said mode 3 wasnt working so its detuned rn. But what did you expect, liter bike acceleration?

A 20S16P battery, with Molicel P42A cells will supply 720A to the controller. A 72V controller that can supply 416A to the motor should be 30KW. So yes this battery can supply more than enough for 30KW

Hello rider from Bavaria. A friend named Bridger Hombreverde has that and built that with QS138 70H V3 and the EBMX X-9000 controller. Here are a couple links: facebook.com/groups/567942763393004/ facebook.com/groups/684227311714643/search/?q=bridger%20hombreverde He is a friend and if you need more contact info, get back with me.

I have read that you can damage the magnets with certain settings. But that would just slow it down. Votol has a Controller Debug Manual on there website,

Thanks

This kit is really universal. It is for Carter's 2008 Honda CRF. It is being used in a dirt bike application, but the harness comes with all the wires for lights, horn, blinkers etc for street. They, China, also sell a set of throttle and controls for all those functions. I can't send a picture on this comment section. He has his own motor, I was just using this motor in the YZ. Sign on to the ElectricDirtRiders.com forum and start a conversation with me and I can share information.

Yes you can run 420A, but you may overheat the controller, do you have water cooling. If it overheats it will come back on in about 10-15 minutes. but the cycle will repeat. You cannot change the controller or motor overtemp setting. I have no experience with hub motors, so I can't help you there.

No I don't, I have found that the Molicell P42A give me the power I need and the longevity. They are the same cells that the Stark use.

Yea stop over some time and take one of the bikes for a test ride. They are so much fun. I am at the corner of Kiowa and Duke Dr. The Red Jeep Grand Cherokee

Yes. We are using P42A in a split battery. 2 x 20S6P packs, so I can charge them faster on 120VAC They seem to be the best for power. We can get over 400A out them. There is a lot of discussion on using a LGZ P2.7 pouch cell out of Chevy Volts, but I don't see a benefit, they are heat sensitive. The bike stopped mid way on this youtube, because the controller overheated. I have put a water cooling system on since.

@@dcoxrytonhow was the bike been since you put the cooler on the controller? Also, do you have a kit for the motor mounts etc for this? I’m looking at building a 2022 KTM also.

@@724MX Yes the cooler is on and working fine. But the temps are cooler now, but I believe the cooling far exceeds the heat build in the controller. I went to Arizona Cycle Park last weekend with no heating problems. Yes I have a set of mounts for this model. Go to ElectricDirtRiders.com forum page, log on the site, and start a Conversation with me. ( it is the little envelop next to your log in ) I can then share pics and info.

You are welcome JaneKLX. I would be glad to help you select the right stuff. If you go to ElectricDirtRiders.com, and start a conversation with me ( DonCox) there, I can share pictures and files. This comment section is quite limited.

@@scottpurcell2813 yes we can give you some easy adjustments for that. Go to ElectricDirtRiders.com and start a conversation with me. That way I can share pics and files with you.

@@dcoxryton Cant find you on there

@@scottpurcell2813 it's Doncox

I have a couple of bike ready to go. A 2008 KTM 250SXF QS 138 70H V3 motor, and EM260S controller72V42AH battery. street legal, lights and plated, $4000. A 2005 CRF 450 same gear with a brand new 50AH battery, this one has a title, and an on board 12V system, could be made street legal, $4500. Both have new motor and controllers. Start a Conversation on this forum, ElectricDirtRiders.com, with me DonCox, and I can send you pictures. . RUclipss of these bikes are on my site.

Lithium-King.com sells a really good one with wider spline area. They are a little pricey, but it is a small market

No I haven't tried the Far Driver controllers. I have been using the Votol controller so long, and I know it. If I were to go to another, it would be the EBMX X9000. But they are pricey. I have thought about higher voltage, and the Far Driver can give that but everything is now built around 72V. But more voltage is more power.

No I have not tried a 3 shul controller. I had heard that they had reliability issues, and a friend tried one and it had to be returned, We have had good success with the Votol and the price is good

On this one I did make my own, and they are welded in. I have a bolt in system I just used on a 2019 KTM 450SXF. If you want more info about the bolt in kit, go to the forum ElectricDirtRiders.com , and start a conversation with me, and I can share images and info on the mounts.

My KTM weighed 232lbs before the water cooling system for the controller. 240lbs afterwards. I haven't weighed the Honda yet, I'll bet it is under 240lbs. Final ratio is 2.3 inside the motor and 13 - 14 to 48 - 52 on the sprockets. The QS 138 70h V3 is the best motor , size, weight, and power, unless you are over 200lbs

Good observation, this is the old tire that came on the donor bike for this electric build/upgrade. It is hard and old and worn out. Link that with the high low speed torque of the electric motor, and you loose control of the rear tire quick. Scott doesn't have a lot of saddle timein the electric bike also. It takes a lot of learning

Thanks Tyler, how have you been. Yea we had a fun day today, it is a bit of a drive but well worth it.

I have helped a lot of people using the Electricdirtriders.com as away to share data. It cannot be done on here. To register it asks you 5 items and one question to make sure you are human and interested in motorcycles. I'd love to help you, please try again.

Yes I can help you. Go to Electricdirtriders.com forum and start a Conversation with me. That way I can send pictures and docs much easier.

@@dcoxryton come posso aprire una conversazione ? grazie molte

Please contact me thru the link that I listed . My name on there is DonCox. I would be glad to help you. Are you in Italy?

I'd be glad to help you. If you go to Electricdirtriders.com and start a conversation with me Donald Cox, I can send you pictures and documents to help you get it done. What year YZF do you have. I have done 2003 YZF, 2008 YZF, and 2014 YZF250

@@dcoxryton i have an 05 yz250, em260s, 1st gen qs138. i would really appreciate the help. I bought the bike partially built and i just finished the build but im having a few problems that i believe are related to configuration errors from the first owner. i'll go ahead and start a convo with you.

Just sent you a message on the site. Thank you again for the help!

China mostly and many parts from Amazon, which came thru Amazon from China. The total cost for all the parts are about $3500. That is a new motor, controller, and 72V 50AH high current battery (400A), plus all the components. If you give me a donor bike, I will build it for you for $3500 parts, and $1500 to build and you will have a 60mph wheelie machine, or good moto bike. Watch this RUclips of the finished Steve's bike. ruclips.net/video/7lAsFCx8zw0/видео.html&ab_channel=DonaldCox

Because KTMs handle real well. The Electric power adds another dimension to riding. Why do you think they are selling so many Starks, not just because they are electric, but it offers a different riding experience. Try one.

@@dcoxryton Ok i hear ya. I was just curious because KTM has an electric dirt bike, the KTM freeride. Why not just buy that? Is there some chassis/handling/else difference that lead you to this decision? And yes at some point I'll try some electric dirt bike when it's possible. I want to know how the instant torque feels. But i think I'd still miss the rawness and sound of combustion engines. Right now, my 2019 KTM 450 EXC-F is so fun and interesting for me i could never swap it to elecric.

@@kahvinorja I hear you too. my last gas bike was a KTM 350SXF, and I loved that. I have built about 15-20 electric bikes, Honda's, YZ's, Ktm's Kawasaki's. They are all fun . The KTM freeride is a 3/4 size bike like a Honda crf 150, and they are fun play bikes, but we have too much power for that short of wheel base. You saw in this youtube my personal 2022 KTM 250SXF Electric. I know the 450 will out pull me in top end, but a whole bunch of us guys are having so much fun on these electrics. And I have built some for special needs people A lower leg injure for two different people, and they can't shift, and now are riding. They are just different and fun, but they have power. Hop in someone's Tesla, a tell me it isn't impressive. Keep riding, I'm 79 and still going. Watch my youtube at Glen Helen Bluecrue race.

@@dcoxryton Ah ok, I didn't know Freeride was smaller than a fullsized dirt bike. Then the conversion makes sense to me. That's a lot of bikes you've built! And helping disabled riders to ride again, that is really cool. What kind of voltage does the electric motor have? What do you do with the gas engine you take off from the bike? And how many hours/miles(/kilometers) can you ride with single charge? I guess it depends on the use.. terrain vs road..? And is there an electric motor that you can just "throw" in these bikes or does it require a lot of modifications for motor mounts and such..? And lastly what is your favorite bike you have done a conversion on?

@@kahvinorja The bikes we are building right now have a range of about 25 miles of single track, but we have batteries that we can build with that can get 30% more range, they just aren't good for max power or moto track. That is what we like. I am building the 3rd KTM I have built, and I am building a kit that could be used on 2019-2022 KTM 450 SXF and probably Husky and Gas Gas. With this kit and motor controller, it will bolt in with very slight mods to the air box and tank, but no mods to the frame. I like the YZ and Honda because we can make a quick change battery for them. I rode a 2014 YZ250F electric for quite a while, but I have always been a KTM guy. I love this KTM electric.

The battery in this ride is from a KTM Freeride, 2000mah cells the can deliver 25A. I get 120A out of this test battery for a short time. It is a 20S5P battery. Look at the newer RUclips with the real battery in it. I can push 400A for a while. 300 A for about 12 laps on like Glen Helen, the big track. I don;t have Whatasaasp, or Whatsapp, but start a Conversation on ElectricDirtRiders.com with me and I can share info.

Why are we fixed on a battery size? Go to this site, and start a conversation with me, and I can share some pictures and info. Electricdirtriders.com, and I am DonCox

I love the power. When the battery is fully charged it is producing 40HP , but the torque is huge. It is all of a 250 if not more. And it just has torque all the way thru the acceleration. Where do you live, we have guys building these all over the states, if you want to ride one, maybe we can get you a ride. I saw your KTM in your go kart youtube.

Yes the Controller is water cooled, the motor does not seem to overheat yet, but the batteries do collect heat collectively. The first charge on a ride day is great, you can usually get the second charge in, , but if it is a 90 degree day, the battery will have too much heat now in it to not allow another charge for about an hour. And then the cycle repeats. We build the batteries so tightly for space and weight reasons, this compounds the issue. KTM, YZx50F, and Honda aluminum frames will all be quick battery change in there next builds. Watch for my next KTM 2019 450SXF build. The top speed now is 60-65mph with motocross gearing, and way more low end torque now so we could gear up for more speed. With the Votol EM260S 400A at 72V nominal (84V at full charge). That is 33.6KW at full charge and 28.8KW at nominal voltage. I raced a 6 lap race at Glen Helen on the big track, and I went from 82.5V at start to about 74V at the end of the 6 laps. I could have run another 6 laps, but you can feel the lower power. It does draw 400A at max power in this RUclips

No I don't. There are too many different bikes. I do use Lithium-King.com for many builds. They can water jet the basic mounts, but they still require a lot of fabrication work on top of that. It is difficult in these builds since everything interacts. The motor mount is also part of the Battery bottom tray. The angle of the battery tray is determined on how the largest battery box fit into the frame. I have KTM's, Yamaha YZ250-450 F newer (2014-2024), and now 2005 Honda 450CRF down to how I could build another quicker. KX80-85-100 also. But they make subtle changes on a lot of frames year to year. So each is very custom.

If you watch the 2019 KTM 450SXF factory edition test ride before we tear it down to be electric, I am on my electric KTM YouTubing the test ride. It has everything the same as the 2005 Honda, and when the 450 gassed it I pegged the electric right along side, and kept with him.

Send me a message on the Electricdirtriders.com forum, so I can get pictures and file to you. Also on the Facebook Votol Controller Forum, I posted some info, and you will need this Zip file facebook.com/groups/999971084014927/permalink/1284805222198177/