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Pneumatic exhaust valve adaptable to Rotax engines 125 cc and 140 cc, for engines type 122 and 123.The different opening adjustments of the exhaust valve range from the "softer" "position 1" (low rpm exhaust valve opening) to the "hardest" "position 9" (high rpm exhaust valve opening)

Pneumatic exhaust valve adaptable to Rotax engines 125 cc and 140 cc, for engines type 122 and 123.The different opening adjustments of the exhaust valve range from the "softer" "position 1" (low rpm exhaust valve opening) to the "hardest" "position 9" (high rpm exhaust valve opening)