We do not have an XTR S 450 scooter in the shop so not sure if larger batteries would fit without modifications. Installing batteries with a higher Ah rating will not cause any problems because the controller only demands as much current as it can handle from the battery pack. The extra weight of very large batteries could possibly cause a problem in hilly areas though due to the extra weight and extra load placed on the motor.
Nothing can be safely overvolted. When overvolting there is always the risk of burning out the motor and/or controller.
Due to the non-standard size motors on BladeZ scooters, we do not have any plug-and-play or bolt-and-go kits for them. Modifying a BladeZ scooter to have a different motor would require custom installation. A kit such as KIT-48300 is an example of a 48 Volt 1000 Watt kit that would typically be used to modify a scooter to 48 Volts.
We can make a custom kit with different parts chosen specifically for your modification.
A blinking red light indicates three possible problems:
1. The throttle is not at the zero throttle position when turning on the scooter.
2. The battery pack is under 19 Volts when the power switch is on which indicates a problem with the battery pack or charging system if the battery pack has recently been recharged.
3. There is a problem with the controller.
If it winds up that the controller is causing the problem then original plug-and-play controllers are no longer available so a different controller and throttle would need to be custom installed and wired into the scooter.
Presuming that an appropriate motor to rear wheel gear ratio is used then the higher the Watts rating that the motor has the more torque it will have and the higher top speed it will be capable of. Our 60V 2000W brushless motor is the most powerful motor that we currently carry and it is capable of a 35 MPH top speed on flat ground.
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Presto Chango