diff --git a/src/main/drivers/accgyro_spi_mpu6500.c b/src/main/drivers/accgyro_spi_mpu6500.c
index 316a296c3..6f9a25fe7 100755
--- a/src/main/drivers/accgyro_spi_mpu6500.c
+++ b/src/main/drivers/accgyro_spi_mpu6500.c
@@ -72,11 +72,7 @@ static void mpu6500SpiInit(void)
     IOInit(mpuSpi6500CsPin, OWNER_SYSTEM, RESOURCE_SPI);
     IOConfigGPIO(mpuSpi6500CsPin, SPI_IO_CS_CFG);
 
-#if defined(STM32F4)
-    spiSetDivisor(MPU6500_SPI_INSTANCE, SPI_SLOW_CLOCK);
-#else
     spiSetDivisor(MPU6500_SPI_INSTANCE, SPI_STANDARD_CLOCK);
-#endif
 
     hardwareInitialised = true;
 }
diff --git a/src/main/drivers/bus_spi.h b/src/main/drivers/bus_spi.h
index 1d5eca6bc..cd250659d 100644
--- a/src/main/drivers/bus_spi.h
+++ b/src/main/drivers/bus_spi.h
@@ -26,31 +26,28 @@
 #include "io.h"
 #include "rcc.h"
 
-#if defined(STM32F40_41xxx) || defined (STM32F411xE) || defined(STM32F303xC)
+#if defined(STM32F4) || defined(STM32F3)
 #define SPI_IO_AF_CFG IO_CONFIG(GPIO_Mode_AF, GPIO_Speed_50MHz, GPIO_OType_PP, GPIO_PuPd_NOPULL)
 #define SPI_IO_AF_SCK_CFG IO_CONFIG(GPIO_Mode_AF, GPIO_Speed_50MHz, GPIO_OType_PP, GPIO_PuPd_DOWN)
 #define SPI_IO_AF_MISO_CFG IO_CONFIG(GPIO_Mode_AF, GPIO_Speed_50MHz, GPIO_OType_PP, GPIO_PuPd_UP)
 #define SPI_IO_CS_CFG IO_CONFIG(GPIO_Mode_OUT, GPIO_Speed_50MHz, GPIO_OType_PP, GPIO_PuPd_NOPULL)
-#elif defined(STM32F10X)
+#elif defined(STM32F1)
 #define SPI_IO_AF_CFG IO_CONFIG(GPIO_Mode_AF_OD, GPIO_Speed_50MHz)
 #define SPI_IO_CS_CFG IO_CONFIG(GPIO_Mode_Out_OD, GPIO_Speed_50MHz)
 #else
 #error "Unknown processor"
 #endif
-#if defined(STM32F40_41xxx) || defined (STM32F411xE)
 
+#if defined(STM32F4)
 #define SPI_SLOW_CLOCK      128 //00.65625 MHz
-#define SPI_STANDARD_CLOCK    8 //11.50000 MHz
+#define SPI_STANDARD_CLOCK   32 //05.25000 MHz
 #define SPI_FAST_CLOCK        4 //21.00000 MHz
 #define SPI_ULTRAFAST_CLOCK   2 //42.00000 MHz
-
 #else
-
 #define SPI_SLOW_CLOCK       128 //00.56250 MHz
 #define SPI_STANDARD_CLOCK     4 //09.00000 MHz
 #define SPI_FAST_CLOCK         2 //18.00000 MHz
 #define SPI_ULTRAFAST_CLOCK    2 //18.00000 MHz
-
 #endif
 
 typedef enum SPIDevice {