diff --git a/firmware/controllers/algo/engine_configuration.cpp b/firmware/controllers/algo/engine_configuration.cpp
index a1ec20872f..9e82261c4a 100644
--- a/firmware/controllers/algo/engine_configuration.cpp
+++ b/firmware/controllers/algo/engine_configuration.cpp
@@ -1459,7 +1459,9 @@ void prepareShapes(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
 #endif
 
 float getRpmMultiplier(operation_mode_e mode) {
-	if (mode == FOUR_STROKE_CAM_SENSOR) {
+	if (mode == FOUR_STROKE_SYMMETRICAL_CRANK_SENSOR) {
+		return 2;
+	} else if (mode == FOUR_STROKE_CAM_SENSOR) {
 		return 0.5;
 	} else if (mode == FOUR_STROKE_CRANK_SENSOR) {
 		return 1;
diff --git a/firmware/controllers/algo/rusefi_enums.h b/firmware/controllers/algo/rusefi_enums.h
index 32a0d97cc3..510cd2adc3 100644
--- a/firmware/controllers/algo/rusefi_enums.h
+++ b/firmware/controllers/algo/rusefi_enums.h
@@ -515,6 +515,10 @@ typedef enum __attribute__ ((__packed__)) {
 
 #define CRANK_MODE_MULTIPLIER 2.0f
 
+/**
+ * @see getCycleDuration
+ * @see getEngineCycle
+ */
 // todo: better enum name
 typedef enum {
 	OM_NONE = 0,
@@ -535,7 +539,7 @@ typedef enum {
 
 	/**
 	 * 720 degree engine cycle but trigger is defined using a 180 cycle which is when repeated three more times
-	 * In other words, same pattern is repeatet on the crank wheel twice.
+	 * In other words, same pattern is repeated on the crank wheel twice.
 	 */
 	FOUR_STROKE_SYMMETRICAL_CRANK_SENSOR = 4,
 
diff --git a/firmware/controllers/trigger/decoders/trigger_structure.cpp b/firmware/controllers/trigger/decoders/trigger_structure.cpp
index ba8d677eb7..7834f1e1b0 100644
--- a/firmware/controllers/trigger/decoders/trigger_structure.cpp
+++ b/firmware/controllers/trigger/decoders/trigger_structure.cpp
@@ -113,6 +113,7 @@ int TriggerWaveform::getTriggerWaveformSynchPointIndex() const {
 
 /**
  * physical primary trigger duration
+ * @see getEngineCycle
  */
 angle_t TriggerWaveform::getCycleDuration() const {
 	switch (operationMode) {
diff --git a/firmware/controllers/trigger/decoders/trigger_universal.cpp b/firmware/controllers/trigger/decoders/trigger_universal.cpp
index 17eae3d139..3ed37adec3 100644
--- a/firmware/controllers/trigger/decoders/trigger_universal.cpp
+++ b/firmware/controllers/trigger/decoders/trigger_universal.cpp
@@ -7,6 +7,9 @@
 
 #include "trigger_universal.h"
 
+/**
+ * @see getCycleDuration
+ */
 angle_t getEngineCycle(operation_mode_e operationMode) {
 	return operationMode == TWO_STROKE ? 360 : FOUR_STROKE_ENGINE_CYCLE;
 }