jeremy

so my brake rotors are warped. its really pissing me off. my question is, do i need to get new ones or can i have these ones machined? i just got my drilled and slotted rotors on my car machined, but i'm worried they won't be able to do the motorcycle ones because of the thickness.

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Jeffytune

Hi.

In general, when a rotor warps it is because the metal is uneven in hardness. Yes, you can sometimes cut them to be level again, but they will warp out again, only it will take less time as the metal is now thinner.

For the time and cost involved with turning them, you will be money ahead in the long run to just replace them instead.

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curveaddict

Full floating rotors can't be machined because, well, they float. They can't be mounted properly into a lathe unless you remove the rotor from the carrier. After that, you will need new rotor buttons and the proper installation tool. It's generally not worth the money or effort.

EDIT: And what Jeffey says!

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wsmc831

new ones.

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jeremy

fack.
o well. i'm selling it. someone else can deal with them.

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Eugene

I have always wondered what exactly the benefit is of floating discs...

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jeremy

what does "floating disc" mean? the design on my bike seems the same on my car. unless my altima has floating discs as well.

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curveaddict

The disc 'floats' on a carrier and is held in place by those buttons, rather than being bolted directly to the hub. This allows for less heat transfer to the hub and bearings, and also helps prevent rotor warpage due to high speed braking; when the rotor expands due to heating. Obviously the rotor sometimes warps, anyway. Bike rotors also bend very easily if you drop a loose wheel, for example.

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Eugene

Floating disc is when the disc itself is not directly connected to the inner part of the disc that bolts to the fork. In the pic, look at the little round things around the disc, those hold the outter portion of the disc in place.



that makes much sense, thanks

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theJrod

Is your rotor actually bent, or is it uneven pad material deposits?

If it's bent, just hit it with a rubber mallet. I've fixed a few rotors with this method.

If it's just pulsating at the lever, but there is no visible runout of the rotor, then just have it sand blasted and re-bed the brake pads

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MichelinMan

If you choose to go this route, you'll do well to inform any potential buyers of the situation.

I actually had a bent rotor on my bike. I kept bleeding my brakes, but my lever pressure sucked.

Finally swapped the rotors. It helps some, but didn't completely resolve the problem. I started getting some "pulsating" when stopping, so I pulled the calipers.

Turns out the bent rotor had completely f*cked the pads on the left side (the side with the bent rotor) and they were thicker in the front, and super thin in the back.

Swapped the pads and holy sh*t. I damn near did a stoppie the first time I tried to stop. I actually had to adjust my pazzos in from 3 all the way back to 1. I can use one finger to stop now, no loss of feeling issues, and amazing stopping power.

It's amazing to see how differently the bike acts when sh%t is working like it's supposed to.

Anyway... I bought a set of used rotors off eBay actually. They were just stock ones taken off a parted out bike from a reputable shop (not some stolen/jacked bike).

Straight rotors + new EBC HH pads = stopping heaven.


***edit*** I too have an F4i.

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Mic

Wasco Frame Service
4801 Harbor View Dr NE, Tacoma, WA 98422
Shop: 253-927-0669

^ Wasco can check your rotors to see if they are bent and straighten them. I can't remember the cost, but I believe it was something like 50 bucks for a set (Buddy of mine had it done).

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Nicegy525

Barry Wressell of Kung-fu grip/GP suspension North

can straighten rotors for about $40/set

Bring them into EDR and Eric can run them up to Barry or Barry can pick them up when he comes down.

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Mic

And Barry gives them to Wasco

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Wrench

Stock Honda rotors? NOT full-floating.

In fact, most all current sportbikes dont use full-floating rotors. The rotors are rivited to the rotor hub with no movement allowed. You can purchase full-floating rotor buttons to replace the stock ones and this may fix your problem. Even if the rotors have a slight warp, you wont even notice. And they have a nice jingle...

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Damon Mon Wai

I have had Wasco straighten rotors and wheels for me before. He does great work and its cheaper then buying used ones.

http://wascoframe.com/

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