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Old 03-27-2020, 10:01 PM
Bmr4Karts Bmr4Karts is offline
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Default I call this kart "Sitting Sideways"

I think you can guess where the name came from.

This is a Baja Motorsports Dune 6.5 that bought for $60 without an engine or seat. I swapped the dirt tires to slicks, but I'll be going to sawtooth tires soon due not being able to get up my slick hills.

I still have a lot of final touches to do but it runs. I temporarily have 50 amp blade fuses on the line it pops them easily. That said, I haven't gotten a chance to give it the full beans yet but it will be good for 30mph with the 10:54 gearing I currently have.

I also plan on installing a hydraulic hand brake from a bike, just need to find the right one.

Setup

72v 3kw motor
100 amp controller (continuous amps)
18s lithium cells from a Ford plugin hybrid


Stock Razor Dune Buggy is there for size comparison. This kart is much for comfy to fit in.
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20200327_171457.jpg   20200327_171636.jpg  

20200327_171625.jpg   20200327_171613.jpg  

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  #2  
Old 03-28-2020, 07:45 AM
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I hope you do not mean bicycle
since a clear NO to bicycle brakes!!

get a kart brake instead.. a cheap mechanical caliper is far more reliable
on a kart than any -doesn't matter how expensive- hydraulic bike disc setup.

if you want hydraulic, go hydraulic (still kart caliper)
if you want a hand lever instead of a pedal, get a motorbike brake lever.

if you meant motor-bike, no worries.. move on

Oh that batpack needs a cap quite badly, I expect that to be seen soon

'sid
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Old 03-28-2020, 08:55 AM
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Um...
I thought you was "steppin' up" to an actual racing kart?

Isn't a Baja Dune like a Chinese "fun kart"?
...sure that chassis can handle the "stresses" that a 72V system can/will apply?

Where do your feet go?
...on the front bumper (unprotected)

Gonna add some protection, around that motor hanging off the back?

You may need a "more thermally protected" coupler for your motor phase wires
...these wires can get really, really hot

* I melted my DIY plastic, phase wire coupler, on the Atom kart

Also, maybe post more info on that batt pack
& yup, please make/use a cover for it
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Old 03-28-2020, 09:22 AM
Bmr4Karts Bmr4Karts is offline
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Bike = motor bike.

Race kart is up next. I needed something to ride with the kids first and the Razor Dune I built up was just too small.

The front bumper and rear motor mount are just fine considering those parts are factory stock

Here's a video of a factory gasser for reference. Doubt my system is going to over-stress the chassis.

I'll check on the HDPE.

Pack is 18 cells from this.

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Old 03-28-2020, 09:26 AM
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I dig the battery pack right between the legs!
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Old 03-28-2020, 03:54 PM
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Quote:
Originally Posted by JTSpeedDemon View Post
I dig the battery pack right between the legs!
Thanks.

It's great for weight distribution as well as keeping an eye on it.
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Old 03-28-2020, 08:12 PM
Bmr4Karts Bmr4Karts is offline
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Okay, I'm actually impressed with the power output of a $130 motor with a $120 controller.

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Old 05-07-2020, 08:01 AM
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Update

I've upped the battery to 20s. Top speed with the 72v motor is about 30mph on flats. Drops with the battery.

I'm going to put my big motor on here but decided to try a small 60v motor before I do that.

60v at 80v is pretty fun. Didn't notice much torque loss and the top speed went up to 34mph on flats.

I love this little kart frame, its no race kart but it handles well enough. Handle controls are a dream.

Oh yeah, both motors pull over 100 battery amps.

https://youtu.be/rUr77jEBcQw
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Old 05-07-2020, 11:46 AM
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Curious.... From what motorcycle brakes did you use?
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Old 05-07-2020, 11:51 AM
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Quote:
Originally Posted by mckutzy View Post
Curious.... From what motorcycle brakes did you use?
I haven't installed it yet, need to fab a different bracket and space the wheel out a little. But otherwise it will be great.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
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Old 05-07-2020, 11:15 PM
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ok cool..
I was referring to the currently installed brakes you have presently in the #2 and #3 pics shown above...
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Old 05-08-2020, 03:44 AM
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Quote:
Originally Posted by mckutzy View Post
ok cool..
I was referring to the currently installed brakes you have presently in the #2 and #3 pics shown above...
That's the factory installed brake and it comes on a lotmof trail master gokarts.
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Old 05-18-2020, 02:06 PM
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So this was interesting.

https://youtu.be/klohq8X9J-M

https://youtu.be/nhFevWe4Gt0

After a few passes outside I turned down the torque a lot. Then it turned into a car with one huge turbo. Smooth off the line and then whoosh.
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