Steve Saunders Goldwing Forums - View Single Post - GL 1500 : second hand front brake disc

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post #9 of (permalink) Old 02-18-2017, 12:36 PM
Aloha Tom
Banned
 
Join Date: Mar 2015
Location: All Roads Lead To Yosemite, CA.
Year: 94
Model: 1500 SE
Posts: 4,568
The purpose of slots on the sides of brake rotors is: to provide an escape path for expanding pad gasses being generated by the braking torque.

In EXTREME situations the outgassing from HOT-HOT pads can physically push the pads off the rotor- despite having your foot or hand buried!

Not a situation encountered in sane street riding, mountain fun maybe, Maaaayyyyybe
On the track, yep

Getting Your Groove On: 2 schools of thought- forward or backwards in relation to direction of travel ~,
Or is that mostly for show- as its not about cooling or dissipating heat- its an escape path

Note: A rotor clearly marked LEFT shouldn't need a directional arrow as well
Just because you all drive on the wrong side of the road over there.........
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