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post #1 of 33 (permalink) Old 08-29-2012, 11:16 AM Thread Starter
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Custom Rotor

I just machined this for friend's bike.Let me know what you think .Thanks
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post #2 of 33 (permalink) Old 08-29-2012, 11:31 AM
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Rotors are functional, not fashion items. You asked.

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post #3 of 33 (permalink) Old 08-29-2012, 11:37 AM
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Rotors are functional, not fashion items. You asked.
Did he ask if they looked cute?
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post #4 of 33 (permalink) Old 08-29-2012, 11:41 AM
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Ive never understood the effect of different shapes on the rotors. anybody care to explain?

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post #5 of 33 (permalink) Old 08-29-2012, 11:47 AM
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Even break wear, as far as I know. Since if every hole was the same you would not have a solid surface for the pad to go across at some point. Prob cut up your pads if not
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post #6 of 33 (permalink) Old 08-29-2012, 12:07 PM
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what was your cycle time.. ?
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post #7 of 33 (permalink) Old 08-29-2012, 12:07 PM
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It does look nice.

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post #8 of 33 (permalink) Old 08-29-2012, 12:35 PM
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I'm thinking that there's not a whole lot of braking surface on them, mostly gaps. Wouldn't want that much open space on a rortor. The brake only works if it has something to grip. The mass of the rotor also absorbs the heat from braking and those look like they'll heat up too fast. I'd be worried about using the rear brake with that rotor.

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post #9 of 33 (permalink) Old 08-29-2012, 12:40 PM
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I'd try them for the rear, since it's not used that much. I definitely wouldn't try something like that on the front.


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post #10 of 33 (permalink) Old 08-29-2012, 01:15 PM
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It's hard to say on fuctionality but it looks good. Did you start from scratch or did you use a stock rotor?
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post #11 of 33 (permalink) Old 08-29-2012, 01:32 PM
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i dont think that is going to work very well at all. But on the plus side it will stay cool

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post #12 of 33 (permalink) Old 08-29-2012, 03:59 PM
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well they look pretty cool,
wave rotors usually have a consistant pattern meaning its always the same amount of material in contact with the pads which is fine but this looks as though the large slots are not quite the same as the rest which will affect modulation but if your not track'n it and it being on the rear it should be fine!

right or wrong.... its nice work!


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post #13 of 33 (permalink) Old 08-29-2012, 04:18 PM Thread Starter
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what was your cycle time.. ?
I'm not exactly sure under 2hrs

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It's hard to say on fuctionality but it looks good. Did you start from scratch or did you use a stock rotor?
Stock

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well they look pretty cool,
wave rotors usually have a consistant pattern meaning its always the same amount of material in contact with the pads which is fine but this looks as though the large slots are not quite the same as the rest which will affect modulation but if your not track'n it and it being on the rear it should be fine!

right or wrong.... its nice work!
Thanks....he sent me a pic of one he wanted to copy so I just followed to picture

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post #14 of 33 (permalink) Old 09-04-2012, 06:50 PM Thread Starter
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here's what it looked like on the bike
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post #15 of 33 (permalink) Old 09-04-2012, 08:00 PM
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Looks nice and probably fine for the rear. It doesn't look like there is enough mass/area for the front though.

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post #16 of 33 (permalink) Old 09-04-2012, 10:38 PM
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Honestly, it was hard to see where the rotor was, there just seems to be so little if it.

I give you props for exploring designs and trying to find a market and looking for feedback, but what i see there makes me feel like i would be getting a spacer more than a rotor. I like that you're thinking, but the design needs a bit more tweaking.

Maybe instead of the loops going in the same direction, the alternate? Maybe cut the top or bottom of the rotor alternating with a loop here and there? I'm trying to be constructive rather than just criticizing.

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post #17 of 33 (permalink) Old 09-04-2012, 10:46 PM
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The purpose of rotors like this is to reduce the friction area of rear brake. It is VERY common on race bikes to cut down on the effectiveness of the rear brake to make it less "grabby".

Most track riders/racers do not use the rear brake except when they end up in the grass.

My cousin has been using one on his race bike for well over a year with no problems.


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post #18 of 33 (permalink) Old 09-04-2012, 10:58 PM
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1/4mile,
Would you not try to adjust the rear brake mc throw before modding the rotor? i guess I'm looking at it as a street riding than track/racing.

I guess it's a fine line between less friction for less vibration and grippy enough to transfer the weight forward without locking.

I hope to one day find myself in that predicament ... for the track.

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post #19 of 33 (permalink) Old 09-04-2012, 11:07 PM
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Wave rotors were first designed for off road and mx bikes. The reason was to keep dirt, water and other debris off the rotor by the use of aggressive patterns including slots and waves as apposed to the standard circular holes on most disks. The smaller surface area along with the large variety of patterns on wave rotors do allow them to cool quicker in most instances along with better braking performance in wet conditions. A pattern going in one continuous direction likely isn't going to keep the wet performance benefit though. Think of it as scraping and throwing as the rotor rotates, the pattern should be sweeping and pushing away debris. This also means that some wave rotors depending on the aggressiveness of the pattern, have been known to wear down pads quicker, but I haven't been able to notice this myself. I think the only real benefit you'd be gaining in this instance would be very minimal weight reduction. It does look very cool though.

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post #20 of 33 (permalink) Old 09-04-2012, 11:12 PM
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1/4mile,
Would you not try to adjust the rear brake mc throw before modding the rotor? i guess I'm looking at it as a street riding than track/racing.

I guess it's a fine line between less friction for less vibration and grippy enough to transfer the weight forward without locking.

I hope to one day find myself in that predicament ... for the track.

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No, because when you are in the grass doing anywhere from 50-100 mph hour you dont want to worry about regulating brake pedal pressure, if you can just stab at the brake and not worry about it locking up you can usually stop faster.

Also, adjusting the M/C throw usually moves the position of the pedal. Which makes trying to find the rear brake even harder.

I actually really wish I had one of these my last race weekend, I ran off in a 50 mph turn into wet grass, my best chance of stopping was to lock up the brake to stall the engine and just let the (non running) engine braking slow me down. If I had one of these I probably would have been able to use the rear brake more effectively.


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post #21 of 33 (permalink) Old 09-04-2012, 11:25 PM
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Looks pretty cool

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post #22 of 33 (permalink) Old 09-05-2012, 12:05 AM
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*drooling

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post #23 of 33 (permalink) Old 09-05-2012, 12:10 AM
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post #24 of 33 (permalink) Old 09-05-2012, 08:48 AM
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1/4mile,

Thanks for the lesson. :

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post #25 of 33 (permalink) Old 09-05-2012, 10:07 AM
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looks nice, but way too small
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post #26 of 33 (permalink) Old 09-05-2012, 07:16 PM
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looks nice, but way too small
Too small for what??


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post #27 of 33 (permalink) Old 09-05-2012, 07:30 PM
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Woudnt mind getting that done to mine. I've been looking around and haven't found anyone who does it.

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post #28 of 33 (permalink) Old 09-05-2012, 07:31 PM
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I grew with TheX looks good but I personally would not mess with the design of my brakes just for the fact that someone or group most likely engineered them that way for a reason, they have done the testing and prove its effectiveness. I want to know that it won't warp easily, which is one thing I would fear with reducing the surface area causing heating and cooling to become to rapid under heavy braking.


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post #29 of 33 (permalink) Old 09-05-2012, 08:20 PM
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I grew with TheX looks good but I personally would not mess with the design of my brakes just for the fact that someone or group most likely engineered them that way for a reason, they have done the testing and prove its effectiveness. I want to know that it won't warp easily, which is one thing I would fear with reducing the surface area causing heating and cooling to become to rapid under heavy braking.


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How much heavy braking are you doing with the rear brake?


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post #30 of 33 (permalink) Old 09-06-2012, 01:04 AM
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How much heavy braking are you doing with the rear brake?
Personally I don't use the brakes much mostly engine braking, but there are occasions such as people pulling out in front of you, I just see this as one time hard could warp, I may be wrong, but I will leave it to what has been tried and tested true


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