diff --git a/conf/autopilot/subsystems/rotorcraft/imu_b2_v1.0.makefile b/conf/autopilot/subsystems/rotorcraft/imu_b2_v1.0.makefile
index dcf1a660a3..f3074ca2bb 100644
--- a/conf/autopilot/subsystems/rotorcraft/imu_b2_v1.0.makefile
+++ b/conf/autopilot/subsystems/rotorcraft/imu_b2_v1.0.makefile
@@ -9,25 +9,25 @@
 #    <define name="GYRO_Y_NEUTRAL" value="33417"/>
 #    <define name="GYRO_Z_NEUTRAL" value="32809"/>
 #
-#    <define name="GYRO_X_SENS" value=" 1.01" integer="16"/>
-#    <define name="GYRO_Y_SENS" value="-1.01" integer="16"/>
-#    <define name="GYRO_Z_SENS" value="-1.01" integer="16"/>
+#    <define name="GYRO_X_SENS" value="1.01" integer="16"/>
+#    <define name="GYRO_Y_SENS" value="1.01" integer="16"/>
+#    <define name="GYRO_Z_SENS" value="1.01" integer="16"/>
 #
 #    <define name="ACCEL_X_NEUTRAL" value="32081"/>
 #    <define name="ACCEL_Y_NEUTRAL" value="33738"/>
 #    <define name="ACCEL_Z_NEUTRAL" value="32441"/>
 #
-#    <define name="ACCEL_X_SENS" value="-2.50411474" integer="16"/>
-#    <define name="ACCEL_Y_SENS" value="-2.48126183" integer="16"/>
-#    <define name="ACCEL_Z_SENS" value="-2.51396167" integer="16"/>
+#    <define name="ACCEL_X_SENS" value="2.50411474" integer="16"/>
+#    <define name="ACCEL_Y_SENS" value="2.48126183" integer="16"/>
+#    <define name="ACCEL_Z_SENS" value="2.51396167" integer="16"/>
 #
 #    <define name="MAG_X_NEUTRAL" value="2358"/>
 #    <define name="MAG_Y_NEUTRAL" value="2362"/>
 #    <define name="MAG_Z_NEUTRAL" value="2119"/>
 #
-#    <define name="MAG_X_SENS" value="-3.4936416" integer="16"/>
-#    <define name="MAG_Y_SENS" value=" 3.607713" integer="16"/>
-#    <define name="MAG_Z_SENS" value="-4.90788848" integer="16"/>
+#    <define name="MAG_X_SENS" value="3.4936416" integer="16"/>
+#    <define name="MAG_Y_SENS" value="3.607713" integer="16"/>
+#    <define name="MAG_Z_SENS" value="4.90788848" integer="16"/>
 #    <define name="MAG_45_HACK" value="1"/>
 #
 #  </section>
diff --git a/conf/autopilot/subsystems/rotorcraft/imu_b2_v1.1.makefile b/conf/autopilot/subsystems/rotorcraft/imu_b2_v1.1.makefile
index bfef8c6aca..e06aeeb7df 100644
--- a/conf/autopilot/subsystems/rotorcraft/imu_b2_v1.1.makefile
+++ b/conf/autopilot/subsystems/rotorcraft/imu_b2_v1.1.makefile
@@ -9,25 +9,25 @@
 #    <define name="GYRO_Y_NEUTRAL" value="33417"/>
 #    <define name="GYRO_Z_NEUTRAL" value="32809"/>
 #
-#    <define name="GYRO_X_SENS" value=" 1.01" integer="16"/>
-#    <define name="GYRO_Y_SENS" value="-1.01" integer="16"/>
-#    <define name="GYRO_Z_SENS" value="-1.01" integer="16"/>
+#    <define name="GYRO_X_SENS" value="1.01" integer="16"/>
+#    <define name="GYRO_Y_SENS" value="1.01" integer="16"/>
+#    <define name="GYRO_Z_SENS" value="1.01" integer="16"/>
 #
 #    <define name="ACCEL_X_NEUTRAL" value="32081"/>
 #    <define name="ACCEL_Y_NEUTRAL" value="33738"/>
 #    <define name="ACCEL_Z_NEUTRAL" value="32441"/>
 #
-#    <define name="ACCEL_X_SENS" value="-2.50411474" integer="16"/>
-#    <define name="ACCEL_Y_SENS" value="-2.48126183" integer="16"/>
-#    <define name="ACCEL_Z_SENS" value="-2.51396167" integer="16"/>
+#    <define name="ACCEL_X_SENS" value="2.50411474" integer="16"/>
+#    <define name="ACCEL_Y_SENS" value="2.48126183" integer="16"/>
+#    <define name="ACCEL_Z_SENS" value="2.51396167" integer="16"/>
 #
 #    <define name="MAG_X_NEUTRAL" value="2358"/>
 #    <define name="MAG_Y_NEUTRAL" value="2362"/>
 #    <define name="MAG_Z_NEUTRAL" value="2119"/>
 #
-#    <define name="MAG_X_SENS" value="-3.4936416" integer="16"/>
-#    <define name="MAG_Y_SENS" value=" 3.607713" integer="16"/>
-#    <define name="MAG_Z_SENS" value="-4.90788848" integer="16"/>
+#    <define name="MAG_X_SENS" value="3.4936416" integer="16"/>
+#    <define name="MAG_Y_SENS" value="3.607713" integer="16"/>
+#    <define name="MAG_Z_SENS" value="4.90788848" integer="16"/>
 #    <define name="MAG_45_HACK" value="1"/>
 #
 #  </section>
diff --git a/conf/autopilot/subsystems/rotorcraft/imu_b2_v1.2.makefile b/conf/autopilot/subsystems/rotorcraft/imu_b2_v1.2.makefile
index 844b6c786d..bbbbb58e1b 100644
--- a/conf/autopilot/subsystems/rotorcraft/imu_b2_v1.2.makefile
+++ b/conf/autopilot/subsystems/rotorcraft/imu_b2_v1.2.makefile
@@ -9,25 +9,25 @@
 #    <define name="GYRO_Y_NEUTRAL" value="33417"/>
 #    <define name="GYRO_Z_NEUTRAL" value="32809"/>
 #
-#    <define name="GYRO_X_SENS" value=" 1.01" integer="16"/>
-#    <define name="GYRO_Y_SENS" value="-1.01" integer="16"/>
-#    <define name="GYRO_Z_SENS" value="-1.01" integer="16"/>
+#    <define name="GYRO_X_SENS" value="1.01" integer="16"/>
+#    <define name="GYRO_Y_SENS" value="1.01" integer="16"/>
+#    <define name="GYRO_Z_SENS" value="1.01" integer="16"/>
 #
 #    <define name="ACCEL_X_NEUTRAL" value="32081"/>
 #    <define name="ACCEL_Y_NEUTRAL" value="33738"/>
 #    <define name="ACCEL_Z_NEUTRAL" value="32441"/>
 #
-#    <define name="ACCEL_X_SENS" value="-2.50411474" integer="16"/>
-#    <define name="ACCEL_Y_SENS" value="-2.48126183" integer="16"/>
-#    <define name="ACCEL_Z_SENS" value="-2.51396167" integer="16"/>
+#    <define name="ACCEL_X_SENS" value="2.50411474" integer="16"/>
+#    <define name="ACCEL_Y_SENS" value="2.48126183" integer="16"/>
+#    <define name="ACCEL_Z_SENS" value="2.51396167" integer="16"/>
 #
 #    <define name="MAG_X_NEUTRAL" value="2358"/>
 #    <define name="MAG_Y_NEUTRAL" value="2362"/>
 #    <define name="MAG_Z_NEUTRAL" value="2119"/>
 #
-#    <define name="MAG_X_SENS" value="-3.4936416" integer="16"/>
-#    <define name="MAG_Y_SENS" value=" 3.607713" integer="16"/>
-#    <define name="MAG_Z_SENS" value="-4.90788848" integer="16"/>
+#    <define name="MAG_X_SENS" value="3.4936416" integer="16"/>
+#    <define name="MAG_Y_SENS" value="3.607713" integer="16"/>
+#    <define name="MAG_Z_SENS" value="4.90788848" integer="16"/>
 #    <define name="MAG_45_HACK" value="1"/>
 #
 #  </section>