Need help choosing a motor for my electric dirtbike

[TheoneKnocker]

Hello i am new to this forum and i wanted to ask a question. I am mainly focusing on getting the most top speed while having just enough torque so the motor can work. I have 2 options to pick from: option a: The qs138 90h v3 : qs-motor.com – QS138 90H V3 Mid-Drive Motor with Internal Gears
or option
b: Tingtongmotor/sotion fw15 : Tingtong SOTION FW15 7kw / 14kw rate MG120 motor with reduction
or option c: The qs138 90h: qs-motor.com – QS138 4000W Water Cooling Mid-Drive Motor
Which one in your guy's opinion should i get for my purpose of top speed?

 

[Dui ni shuo de dui]

I'm not sure to understand the logic in searching for a high speed low torque motor for a dirt bike. If there is one thing dirt bike need it is torque, you won't be able to reach 200km/h on dirt and you risk frying your motor very quickly if it doesn't have enough torque when climbing hills. Top speed can always be increased by the use of flux weakening so that really doesn't make any sense to me.

Anyway, not my build, do as you see fit, but maybe give this a second thought.

I recommend the QS motor without any doubt, they have proven reliability and decent customer service. Never heard of tingtong and looking at the pictures it seems like it is cheaply made and more suitable for farmer's tricycles.

 

[TheoneKnocker]

I'm not sure to understand the logic in searching for a high speed low torque motor for a dirt bike. If there is one thing dirt bike need it is torque, you won't be able to reach 200km/h on dirt and you risk frying your motor very quickly if it doesn't have enough torque when climbing hills. Top speed can always be increased by the use of flux weakening so that really doesn't make any sense to me.

Anyway, not my build, do as you see fit, but maybe give this a second thought.

I recommend the QS motor without any doubt, they have proven reliability and decent customer service. Never heard of tingtong and looking at the pictures it seems like it is cheaply made and more suitable for farmer's tricycles.

Thanks for the suggestion. I was heavily leaning on qs motor i just needed some confirmation that my plan was bad, and yes ill be going with them and either way, ill be running it at 96v

 

[gustavo88py]

Qs138 v3