Link is worth the read perhaps......... Not to disagree but perhaps the question should be is friction harmful to your motorcycle? If the answer is yes perhaps we might should not start the motor at all. Yes....... I am kidding of course.
www.revzilla.com

Is engine braking bad for your motorcycle? - RevZilla
Is engine braking bad for your motorcycle engine? Read this article to learn how engine braking works and whether it's detrimental for your motor.
