Which part of the rotor precisely do you fear stretching?

I wonder what sort of centrifugal force would be required to stretch that thick steel?

 

I've never hit it. Don't think I will.

 

Why would I want to do that?

 

The rotor is shaped like a bowl with vertical sides which forms the cavity within which the stator is placed. Those bowl sides are not one continuous piece of metal as the magnets are installed within the sides breaking up whatever strength might be inherent in one continuous piece. The very thickness of the sides adds to the force exerted at the base of the bowl where the sidewall joins the hub disk. The hub disk is self supporting with continuous material from the center to the edge but the bowl sides have no continuous material from the center to help hold the shape and size under stress. It is the unsupported sidewall which would be the first to deflect form centrifugal force. Have you heard of scatter shields on drag racers to contain flywheel/clutch components should any of those parts fracture? I doubt that the primary case would be able to perform the same function should a rotor eventually explode at high rpm.

 

Looks like this. They are stuck like crazy till the smallest amount of out-of round condition..then they pop off leaving a thin layer of magnet still bonded to rotor.

 

Wow, and it's only early winter........It's gonna get downright crazy in here by mid-February.

Rotor-stretching.....who'd have thunk it?

 

Nope. Never.

 

I read these threads and the only thing that cones to mind is a bunch of guys riding Harley's really should be riding crotch rockets.

Ok, you got the money, go race it around, rev the crap out of it, do what you want, it's ALL YOURS. As for me, I'll enjoy my bike, be at the same destination as you within minutes of you and my bike will require less maintenance and run longer.

You want a real hot-rod? Go pick yourself up a used Valkarie.

 

I have hit it several times in 1st and 2nd on my Heritage. I don't try to, it normally is when I am with other loud bikes and I don't have a tach. I don't think it would be good on the motor's longevity to frequently hit it intentionally. Before the PCV it was hard not to hit it when raising a little hell.
Heck, I hit it on my limited on the way from the dealer. I was doing a few roll ons and the stock bike was so quiet and I wasn't used to having a tach to observe.
I really have a hard time comprehending some folks on here that say they have never hit it, or never been over 4k etc. Now that would be challenging.

 

good lord, now we are all going to lose our left feet from exploding rotors.....do me a favor and don't tell the NHTSA, then we'll all be wearing mandatory armored boots. Your knowledge of dynamics is a bit skewed.