Hi
All 139 qmb,s use 16 x13 roller weights so that the size you want
Sliders last longer and give a better acceleration curve and higher topend imho
Take care and ride safely dear friend
Yours Hank
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"4wheels move the body 2 wheels move the soul"
Duty, Honor, Country. Those three hallowed words reverently dictate what you ought to be, what you can be, what you will be.
Douglas MacArthur
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