MPU6050 MD5.1 FSR_250 quaternion fast rotation

I use arduino ported library from https://github.com/rpicopter/ArduinoMotionSensorExample

When I change full scale range of gyro to FSR_250 (INV_FSR_250DPS) through mpu_set_gyro_fsr(250);
quaternions that I receive shows much faster rotation.

For abou 10 degree board rotation quaternion shows like 360 degree rotation.
What I am doing wrong?