I've been reading this section of the forum for the last few days absorbing as much info as I can and while searching for more info and debating a purchase, I ran across an add for an xb-500 for sale on craigslist.
I purchased a used non-working XB-500 recently from people that were fed up with the lack of customer/tech support at extreme. They were not willing to pay the shipping to send it back for repair. So, I took it off their hands at a discounted price. I believe all it needs is a new controller.
The story I was given from the previous owner is that it made a loud pop sound while going down a steep hill. Then it was completely dead. Now it blows fuses as soon as they are inserted, even if it is turned off. In fact I had to replace the in line fuse with a new one because of the damage from previous attempts to replace the 30amp fuse.
So here is what I have done in addition to replacing the in line fuse holder and new fuse. I unplugged the controller from the circuit, and now it does not blow the fuse when the battery is connected. So I have at least isolated the rest of the circuits from the problem. I believe this means that it has to be the controller or possibly the motor. I inspected the motor though and it is in great shape. No evidence of spinning the hub mounts or sheared wires. In fact all of the wiring looks good. There is no evidence of water exposure either on the undercarriage and inside the panels.
Here is where I ask for your experience help. I've read as much as I can on the forum here until I have run into posts I already read, so I have a few questions that I have not found a definitive answer to.
1)Does the xb-500 have a regenerative controller? Is it possible that when going down the steep hill the previous owner fried the controller from going to fast, thus generating too much power back through the controller?
2) Instead of replacing the controller with a new one of the same model, is there another model I could use instead from Xtreme, like the XB-600 controller or even the XM-2000 etc . . . Has anyone tried this yet?
3)Has anyone tried replacing the motor with a another higher watt motor? I know that the XM-2000 and up have smaller wheels, but . . . has anyone found another vendor online with a possible substitute?
Thanks in advance for your help. I'm looking forward to experimenting with this and making perform to it's peak. I have short 2.5 mile route to work I plan to use this for, but would like to get it running at it's full potential so I can be safe and accelerate my way out of trouble or harms way when needed. Oh well, and of course just go as fast as I can too !!!