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No I haven't used the 90H gear reduction unit. It is wider than the 70H motor, so you will have a bigger problem with the brake pedal, the motor is heavier, and there is right now more power than I need in Mode 3 with a 70H motor at 350 AMPs and I can go to 450AMPs if I ever need it. I am not a...

Yes I do. Molicel/NPE INR-21700-P42A 45A 4200mAh Flat Top 21700 Battery - Authorized Distributor They have them and with quantity discounts. Building your own batteries is very tricky and can be dangerous, I would find a prebuilt. Here are some ideas with those cells. These cells seem to...

Great videos. I like the telemetry , I will have to see if I can add it to my GoPro. I see the links above Thanks

ProperHooligan, what a great name. You are getting the best kit out there right now, from the guys at ElectroandCompany. I'd be glad to help you. I answered a lot of these questions for another person in a private discussion, so I just copied it and will put it here. I am sure you will have...

I charge mine with 2 chargers. The battery is divided into 2 packs. Each pack is 72V 21ah. Each charger is 72V ( nominal 84V peak) and 10A. I use 2 smaller ones to allow charging on 120VAC. Any larger than 10-12A and you need 240VAC. It takes about 30 minutes to go from 50% battery to 80-90%...

If I built another KTM, I would use the same cells, Molicel P42A. Right now they are less expensive for the amount of energy they pack. The Yamaha is running an older battery type, Sony 18650 VTC6. They do provide the current, 30A, and 3000w of capacity. For less money per cell, the Molicel...

Thanks Frank. Sounds like you are deep in the electric bike world. It sure is fun. I'm not going for the quads on a SX course, but this has plenty of power for my riding. Your statement about riding is so true. I've always ridden in some way , crashed enough, but kept riding. I sure was...

The person I built the KTM for, loves single track and is super jazzed on that bike, so he built another CRF150 for his kids. With the 63AH battery, he gets about 40 mile of single track riding on the KTM. So far so good, on the motor holding up. At 350A on mine , I have put over 100 laps on...

Here is me on the YZ in Mode 2 250A at The Cahuilla Creek Vet Track. I qualify, I'm 77 A friend said I'm going need a Lawyer for that last case....:cry:

The power on my YZ is only about 35hp ( 370A at 72V = 27KW=35hp) There are pluses and minus's to that power number, but the torque is the fun part. I ride most of the time in 81 to the 72V range. If my battery was larger, like the KTM 2017 150SX I built , 63AH, It can provide 450A at 72V for...

I know this is a little later and I imagine you don't have your Stark yet, none of us have ours yet, but here is a littler 240V generator. It weighs 130lbs. A iPower GXS7100iRD Generator at Costco $1300 4 year warranty...

The KTM I built has a 4.8KW battery too. There needs to be a truth in advertising for electric motorcycles. 4.8KW and 30Kw motor power will only do 40miles or 66km. To do 100KM you would have to go to less than 15KW power. On my smaller KX100 I get about 1 mile to 100W at 15KW power max...

I took it out to Glen Helen Tuesday. It was the first time I rode on the REM track. What a fun track. I got about 10 laps on it and then on the charger. If it wasn't moving it was on the charger. With all of us riding it we did about 30 laps. There were at least 5-6 others that took it for a...

Thanks B.Frank. I enjoy building these toys, riding them, and sharing them. Another person who is really sharing the electric Bike Experience and info is the Administrator of this Forum Phillip Glazatov. He will let almost anyone ride one of his Alta's. I let a young kid ride my YZ at the...

Part #2 of the Build As I mentioned in the first part, I forgot to talk about the Swing Arm Bolt Mount. I used 1" od Aluminum tubing with 1/2" id. I cannot measure the width, but it is approximately 3 1/8". I then used a drill press to drill out the center with either a 17mm drill or a 11/16"...

I was asked for information on this build so I thought I would share it with everyone. Let's start with the end Product, a picture (IMG2785) and a video of it at the track yesterday. I started with a 2014 YZ450F donor bike (IMG2571). This bike had been modified as another electric motor...

That breaker might work, I haven't used one. With this high current, I would use the most simply and reliable method. A visible Fuse and a Manual Switch. I recommended the other DC to DC converter (https://www.amazon.com/gp/product/B07GNTC1D7/?tag=sce0f-20) , but you could use the Relay in your...

Welcome to the forum Glen. The Kit you ordered is good for a smaller bike. Did you order the EM150SP/2 controller, or the EM200? The ...SP/2 is there newer line of controllers. With all the EM controllers, the motor max speed is about the same. Just how fast you get there, more Amps is...

That is a perfect donor. 2001-2013 is the newer plastics. Do you have the title on the frame. I made the street legal light kit for mine. Yea check with me to see if I am home and come on out here to try the bikes, they are so fun. I don't know how old you are to recognize these 2 guys...

Hey, I’d be glad to help you. You are going to love the bike. I’ve built three KX 80-100’s with that motor and some full size dirt bikes too. Are you in Yucaipa, if you want to come out here to Lake Havasu, you can ride mine, and ride my YZ with the same motor, and see how it’s done. Do you...