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Me thinks that all that may be needed is a high-voltage polarity switch. Will the motor controller get confused if the motor starts spinning backwards?

OOPS! You are right, we have more than one ProMaster thread here, LOL! I just fixed that. I have the info about the inverter and the batteries in my post #2 and #3. Right now these 5 batteries are good for almost one full charge. If I were to do it again, I would buy two Tesla batteries and...

My S.W.A.G. would be 15 batteries, or 18kWh. Just bring a Rivean or a Cybertruck.

Two years later, and I finally got my wish. The bike is now charging straight from the lithium batteries without needing to run the van's engine. I had to buy 5x Battleborn 100Ah 12V batteries. Four was not enough, even though on paper it should have been fine. Also, in the process, three out...

Did anyone catch the details about possible overheating during his top speed runs? The motor is air cooled, so this is very likely.

You are a beginner. The best shock for you is the one that is known and works well for many other riders. Correction: Just saw your post in Vin Id. Congrats on having a rare and famous bike! The stock Alta spring has the rate of 60 N/mm. You can buy it for under $100. Or you could buy a...

If so, I would then sell the Trax and buy a new stock complete Alta shock.

He says it should possoibe to squeeze out more than 50 kW out of this motor (67 hp). The reverse switch is where the Alta has the start button, LOL! The guy became so excited when the bike was able to reach almost 100 km/h (62 mph). i couldn't finish watching, the video is 1 hour long.

Has the stock spring worked well for you before? This would be a good start, Trax or no trax.

So now BRP has the Alta tech and Polaris has the Zero tech. Neither one wants to make motorcycles. But I am cheering for Polaris. Here is a good interview with the CEOs of Zero and Polaris: Polaris And Zero Motorcycles Ride Together To Build Electric Off-Road Vehicles And Snowmobiles

You are right! I thought Polaris was one of the BRP brands, but no, it is a standalone US company.

I didn't know that Indian was owned by Polaris. Huh. I hope BRP and Harley start an EV trade war and both go bankrupt!

A few things here: 1) Someone needs to warn Zero to not walk into the same trap as Alta did. 2) They are partnering to build Polaris products, not Zero products. I wouldn't expect any motorcycles to come out of this, perhaps only quads and boats.

You will need an aftermarket controller and an aftermarket inverter in order to control the aftermarket battery. There may not be an elegant way to fit them into the Alta's frame, which is designed for the Alta inverter and battery. It might be easier to just build a brand-new bike.

Wow, I must have missed out! I need to watch this!!! Spaceballs - Wikipedia "Spaceballs has made an impact on popular culture and been used as a referent and inspiration in other properties. Tesla Motors has used Spaceballs' starship speeds (Light Speed, Ridiculous Speed, Ludicrous Speed...

+1 This is how he got the Alta's attention too -- on social media. They kept ignoring him until he photoshopped his racing number on an Alta. That got their attention.

Maybe it could be 17% better and 56% cheaper.

We need to ask Elon to engineer a dirt bike frame filled with glued-in battery cells that is lighter and stronger than carbon fiber.

There are a few tasty EV tech tidbits there!