Quote:
Originally Posted by QGolden
Agreed! I have fallen for old auto myths before, we hear them when we are young from someone older, sometimes in a passing conversation, and we just take it as the truth and file it away. But this is one I have challenged folks to prove for years.
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If you want to prove this to yourself, get a 650 Yamaha twin and remove the stock mufflers and just run the header pipes. It will run like krap till you put the mufflers back on and introduce back pressure into the exhaust. Almost any twin cylinder motorcycle will react this way without back pressure as will the inline fours.