Puck.js v2 Accelerometer/Gyroscope (LSM6DS3TR-C)

I believe the gyro full range is 245 degrees per second, so yes, if you divide by 134 you should get degrees per second values.

And yes, you can reconfigure it. This is the reference for the chip: http://www.espruino.com/files/LSM6DS3TR-C.pdf and CTRL2_G is the register that handles the scale.

You can use Puck.accelWr(reg, data) to write to it directly - the default value is 0b00010000 (245dps, 12.5Hz) so Puck.accelWr(0x11, 0b00011100); will set it to 2000dps, not 245 - then you just need to divide by 16.384 to get degrees per second