Since you are planning on upgrading the cart to have a 500 Watt motor the battery pack could remain at 24 Volts so only two batteries would be needed. All of our 24 Volt 500 Watt motors and controllers for brushed motor are compatible with each other. The right parts for the conversion depend primarily on your vision and target for the build.
We have small and large format 500 Watt electric motors.
A smaller sized 500 Watt motor such as our item number MOT-SD156 might allow for the existing battery pack to stay in its original spot, however it would have less torque and less cooling capability than a larger sized 500 Watt motor. It would also require a custom L-shape mounting plate to mount it to the frame.
A larger sized 500 Watt motor such as our MOT-24500X2500B would stick out into the space where the existing battery pack is so the battery pack would need to be moved somewhere else. However this larger motor would have more torque than a smaller 500 Watt motor and also run cooler. This motor might mount directly to the frame or a piece of flat metal or plywood might need to be bolted to the frame to mount this motor onto.
Since a 500 Watt motor will draw twice as much power from the battery pack than a 250 Watt motor does, if the original battery pack is used then the go kart's run time will most likely be cut in half, this is especially true if the cart is driven at full throttle all of the time. To maintain the Ground Force Drifter's original ride time the Ah rating of the batteries would need to be doubled. Converting the cart to have larger batteries would require figuring out a place to mount them and fabricating a tray to mount them inside of.
The Drifter's original throttle and power switch can be reused if they are in good working condition. Or they could be replaced with new parts for an all new parts build.
We can help with selecting compatible parts for the build. We have 500 Watt controllers that go forward only, and we also have them with forward and reverse.
If you could let us know what size of motor and batteries would be best for your conversion, and if you want forward only controller or one with forward and reverse then we could start putting together a parts list?
Are two bigger 12 volt batteries better than running three batteries and changing the controller to 36 volt?
The kart is currently running two 12 volt batteries
Ok. Will the battery run time be cut in half with the 24 volt set up? Or will the two larger 12 volt batteries have the same 40 or so minutes run time as the current set up?
We have 24 Volt 500 Watt controllers with reverse so that is no problem at all.
We were previously discussing using two 15Ah batteries so the modified Ground Force Drifter has the same amount of run time as it did with the original 7Ah batteries and 250 Watt motor.
As long as you do not mind the new motor being longer than the original motor then I recommend the MOT-24500X2500B motor over the MOT-SD156 motor because it has a mounting base and also because it has a larger case with vent holes which help keep it from overheating. If you want to use a smaller motor then the MOT-SD156 will work good though.
Here is a preliminary parts list:
2 qty - BAT-12V15A 12 Volt 15Ah batteries (or any other size that you want).
1 qty - HNS-100 battery pack wiring harness.
1 qty - FUS-360 battery mount ATO fuse holder.
1 qty - FUS-ATO40 40 Amp ATO fuse.
1 qty - MOT-24500X2500B or MOT-SD156 24 Volt 500 Watt motor.
1 qty - SPD-24500R 24 Volt 500 Watt controller with reverse.
1 qty - THR-66 thumb throttle with battery indicator (the original thumb throttle could also be reused if it works).
1 qty - SWT-95 toggle switch for reverse (or a thumb throttle with switch for reverse such as our THR-132).
1 qty - 100 links heavy duty #25 chain with master link (this is more than enough and will need to be broken down to the right size after the motor is mounted).
These parts could be purchased individually or we could make a kit out of them with matching and labeled connectors. For a kit all parts needed to make the motor run need to be included so we can test the kit before shipping it, so it would need to include a throttle. We assemble and bench test all kits to make sure that they work properly before shipping them.
Please let me know your thoughts on this and we can take it from there.
Here is a photo of THR-132.
Pricing for the kit would be around $260.00 without a new throttle and with the reverse switch, or $270.00 with the new throttle that has a built-in reverse switch.
My son's Razor Ground Force Drifter needs an upgrade. I want to do a 500watt motor upgrade and need all the parts to complete it. Can someone on the forum here provide me with all necessary parts to complete the conversion. Part numbers would be helpful. I'm looking to purchase all brand new parts.
Thanks very much. Christopher.