Found our motors, cheap

Yes, you are right. But the reason the 200kv might be useful is for the extra top speed.

 

providing the motor controller was designed for it. But get one and test out if you like, let us know

 

I'm still in warranty so I'm going to wait a bit before I try anything

 

Ok well I have these new motor pulleys, they've just arrived. My problem now is figuring out how to remove the stock drive pulleys, the hole for the bolt holding them on is so tiny I need some kind of micro allen key.

 

Go to imperial Allen key, Which is just slightly bigger than the 1.5mm if the metric one rounds before undoing. Leave motors on motor mounts. Remove motor bolt that is closest to the end of the motor plate. This creates access for the levering. use hair dryer to heat up the Loctite eg heat the cog. Get two massive screwdrivers. Put one flat into the gap created to lever off. Then the other flat on top of that to use as the lever just after heating. Rotate motor between levering efforts. It'll pop off.

 

Thanks Paul I'll give it a shot tomorrow and let y'all how it goes. I need to head into town to get a smaller allen key first.

 

Do everything paul said except do not use a screwdriver. Use and open end wrench its will give alot more surface area and put more even pressure on the motor when prying.

 

A proper way of pulling off the motor pulley is to use a battery terminal puller to gracefully coax it off the shaft. Ilan from Metroboard pointed me to this one that I use on my Metroboards:

 

^^That's probably the most "correct" way to remove the pulley(not to mention that puller is pretty cheap).

However, that puller still puts the pressure in the same place as prying it off with an open end wrench as the shaft is held in by a c clip anyway. .

 

Prying typically puts uneven forces on the part you're removing, uses a fulcrum. A puller evenly pulls and distributes evenly the pressures pulling on the part. The center part presses down on the shaft that stays fixed in the motor, the fingers then have force to pull up on. I don't see prying with a an open end wrench and pulling with a puller as an apples to apples technique.

I do however know some people / friends who make a hammer as an equivalent substitute of a wrench when they get frustrated working on their car

 

Typically you would put the open end wrench on the pulley and smack the back with a hammer, so it wouldn't be prying. The puller is going to press on the shaft as its bearing point, which is attached at the front face place using a c clip. So the pressure is still on the same place. Although, the wrench method would "pull" on the shaft where as the puller would "press in" on the shaft.

I can see how prying with a screwdriver would put WAY more uneven pressure. I agree that the puller is the most correct method to remove the pulley. I'm just saying your chances of causing damage with the wrench method is pretty minimal, as its using the same bearing point.

 

There are three rules to being a good mechanic:

1. Always use the right tool for the job.
2. The right tool for the job is a hammer.
3. Anything can be used as a hammer.

 

Thanks again Paul. The 1.5mm key fit just fine. I used a disposable lighter to heat the cog because no hair-dryer. I use the screwdrivers for lack of more specialized tools.

 

Good work. If you are throwing away the old cog then I guess it only matters if you get it off and not if the pressure is even.

 

while you are there change the motor bearings for any decent wheel bearing, this will be better than the stock one.

 

While I was there I did notice that bearing, but it seemed in good nick after the boards been flogged these past four months so I figured more trouble than it's worth.

Now you've mentioned it though I will swap it out the next time I'm pulling things apart.

 

The gear is held by strong loctite. You can just blowtorch the gear for 15 seconds and it'll come right off very easily. I'm talking finger strength if it didn't burn my finger off. I use heavy aluminum foil to protect the wires just in case though.

 

Hoping to bump this thread- does anyone know where 150KV 1500W motors can be sourced nowadays?
There are a few 2700kv on ebay

The following direct replacement is not available… https://www.boardbumpersshop.com/single-post/2017/09/02/5065-150KV-Replacement-Motor---GTGTX