Igofar always writes about cleaning these bobbins. Now here's a video for the visual learners.
I'll let you clean mine if you make it to NB sometime......Since you will be experienced at it. HaHaI had no idea those moved or were supposed to.
I thought it was just a welded or bolted or some other fastened transition from the outer ring to the inner section.
Now I'll have to check and clean.
You coming to WoodSToc?I'll let you clean mine if you make it to NB sometime......Since you will be experienced at it. HaHa
Those are what make them free-floating discs.I had no idea those moved or were supposed to.
Yes they should be able to spin with finger pressure.Esti1300 said:
OK, what? These are suppose to spin/turn freely? Please expand on benefits over pitfalls if these are left in a seized position. Inquiring minds want to know…
What size bolt-nut combo does the trick?
Thanks
This! And even then the problem probably lies elsewhere, at least that's been my experience. I had to have both front rotors replaced on my ST1300 under warranty due to pulsing. Turned out one of the rotors had an inconsistency in thickness. The bike was too new (less than 3000 miles) for the bobbins to be involved. I also had to have the front rotors replaced on my Super Tenere due to low speed pulsing. This happened at higher mileage than the ST so I fiddled with the bobbins. They were hard to move, but were movable with some effort. No amount of fiddling changed anything, either in the tightness of the bobbins or the pulsing behavior of the brakes. That's when I turned to Yamaha for warranty. Their conclusion was improper machining, but never elaborated. The replacement rotors have been fine from new and now 65,000+ miles later they're still fine. I've never messed with the bobbins again.If you don’t have “grabby front brakes” or “vibrations or front end wobble” it’s a bunch of hoowie. There is no objective or scientific reason this service is necessary when there are no symptoms. Lots of motorcycles have solidly mounted rotors and practically every car or truck has solid rotors. Unless there is pulsing or vibration under braking the calipers are in alignment and/or able to handle minor runout.