Max speed for the qs 138 90h

Hello again, this simple question has been bothering me and i couldnt find any answers on it.
How fast would the qs 138 90h be able to spin with field weakening and is it worth for me to buy it, instead of the qs 138 90h v3 for my electric dirt bike.
I dont have much mountains or trails near me so a little bit more speed would be good since i like riding fast.
If the speed difference is not that much then i will just get the v3 version.
Any answers on the question that i have mentioned would be very helpful and thank you so much.

Are you asking if you can get enough rpm out of a qs 138 90h, or if you should get another qs 138 90h instead?
I think 8000rpm is max recommended, I am not sure what people have taken them to in reality. I think I ran my 138 70h to 9000rpm or so at least.

j bjork said:

Are you asking if you can get enough rpm out of a qs 138 90h, or if you should get another qs 138 90h instead?
I think 8000rpm is max recommended, I am not sure what people have taken them to in reality. I think I ran my 138 70h to 9000rpm or so at least.

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Yes i am searching for the max rpm so i can get more speed, how fast were you able to go with that type of rpm on the motor?

I dont really remember the top speed, 110-120km/h I think. I geared for as much rear wheel torque I could. But I dont really see how that is relevant. if you want higher top speed, gear it for higher speed. I had about 8:1 gearing.

j bjork said:

I dont really remember the top speed, 110-120km/h I think. I geared for as much rear wheel torque I could. But I dont really see how that is relevant. if you want higher top speed, gear it for higher speed. I had about 8:1 gearing.

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Thank you very much for this info

Hello, check on YouTube Havoc motorcycle, have a qs138 90h with gear box running at 350 battery amps, you can find the accelerations test from 0 to 60mph ( I think is just 3 seconds ) and the max speed ( I think is 75mph to 80mph).