Author Topic: Rotor Drilling  (Read 3714 times)

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Offline HellFishTat

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Rotor Drilling
« on: September 01, 2009, 09:28:38 AM »
I have tried to contact Annibus (ElCheapo) about getting the rotors drilled for my '77 CB750F, but have not heard back.

Does anyone know of another outlet for this?
Cheers!
and Ride Safe.

Qingdao

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Re: Rotor Drilling
« Reply #1 on: September 01, 2009, 09:33:10 AM »
Have you tried getting a new rotor that has been drilled and slotted already off the bay?

Offline flybox1

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Re: Rotor Drilling
« Reply #2 on: September 01, 2009, 10:06:51 AM »
Find SPEEDRACER741 on the forum.
he did a top notch drill/chamfer/resurface job on mine. ;D
« Last Edit: September 01, 2009, 10:10:36 AM by flybox1 »
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
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Offline HellFishTat

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Re: Rotor Drilling
« Reply #3 on: September 01, 2009, 11:30:36 AM »
Thanks Flybox1.  I sent him a message.  I'll make sure to let him know you pointed me in his direction.
Cheers!
and Ride Safe.

Offline Flying J

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Re: Rotor Drilling
« Reply #4 on: September 01, 2009, 12:06:21 PM »
Im doing a run of 750F rotors. Ill shoot you some pics when i get them back. I have a set on my bike that i did.

Offline SKTP

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Re: Rotor Drilling
« Reply #5 on: September 01, 2009, 02:25:22 PM »
Chris Schumann in Portland, OR did mine...he did a really good job...had them resurfaced too

you can email him here: speedracer741_@hotmail.com

here's how mine turned out (custom 40 pattern)

1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
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garagedoreen

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Re: Rotor Drilling
« Reply #6 on: September 01, 2009, 03:41:14 PM »
is it for looks or does it really help??

I dont think it does anything because the rotor isnt vented. Or does it?

Offline SKTP

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Re: Rotor Drilling
« Reply #7 on: September 01, 2009, 03:49:04 PM »
I am praying that it stops the shrieking banshees that cry out everytime I brake...
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
2003 Ducati M800ie
1997 Honda CR-V
2004 Honda CR-V
1966 Honda S90

garagedoreen

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Re: Rotor Drilling
« Reply #8 on: September 01, 2009, 03:55:14 PM »
the cross drilled wholes are to exhaust the brake pad gas between the pad and the rotor, so the pad has better contact with the rotor. And if its not vented then the brake pad gas doesnt have any where to go anyways.

either way it looks cool.  ;D

Im probibly going to do it on my bike too.   ;)

Offline MCRider

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Re: Rotor Drilling
« Reply #9 on: September 01, 2009, 04:21:28 PM »
the cross drilled wholes are to exhaust the brake pad gas between the pad and the rotor, so the pad has better contact with the rotor. And if its not vented then the brake pad gas doesnt have any where to go anyways.

either way it looks cool.  ;D

Im probibly going to do it on my bike too.   ;)
You answered your own question?

They don't need to be vented, like a slot would do, the holes simply store the gas until the rotor turns past the pads, then the gas escapes.  Debris and water as well.

They also make it lighter which goes to unsprung weight.

THen there's that coolness issue too.   :D
Ride Safe:
Ron
1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
"Sometimes the light's all shining on me, other times I can barely see, lately it appears to me, what a long, strange trip its been."

Offline HellFishTat

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Re: Rotor Drilling
« Reply #10 on: September 01, 2009, 05:01:43 PM »
unsprung weight and coolness are all I'm looking to gain! :D
Cheers!
and Ride Safe.

Offline MCRider

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Re: Rotor Drilling
« Reply #11 on: September 01, 2009, 05:03:10 PM »
unsprung weight and coolness are all I'm looking to gain! :D

Well    there    you    go.
Ride Safe:
Ron
1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
"Sometimes the light's all shining on me, other times I can barely see, lately it appears to me, what a long, strange trip its been."

Offline HellFishTat

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Re: Rotor Drilling
« Reply #12 on: September 01, 2009, 06:52:10 PM »
I hope you picked up on the sarcasam.  Coolness, at this point in my life is a distant memory.

Unsprung weight on the other hand...the poor old girl's got enough extra sprung weight, so anything I can do to help.
Cheers!
and Ride Safe.

Offline MCRider

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Re: Rotor Drilling
« Reply #13 on: September 01, 2009, 07:34:41 PM »
I hope you picked up on the sarcasam.  Coolness, at this point in my life is a distant memory.

Unsprung weight on the other hand...the poor old girl's got enough extra sprung weight, so anything I can do to help.

Nope missed it, thought you were serious. I was.

At this point in my life, I'm looking for all the "cool"ness I can get.   ;D ;D
Ride Safe:
Ron
1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
"Sometimes the light's all shining on me, other times I can barely see, lately it appears to me, what a long, strange trip its been."

Qingdao

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Re: Rotor Drilling
« Reply #14 on: September 02, 2009, 03:24:17 AM »
...Unsprung weight on the other hand...the poor old girl's got enough extra sprung weight, so anything I can do to help.

Weight loss at the hub of a wheel is different from weight loss else where.

Offline goon 1492

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Re: Rotor Drilling
« Reply #15 on: September 02, 2009, 09:38:47 AM »
Im doing a run of 750F rotors. Ill shoot you some pics when i get them back. I have a set on my bike that i did.

Meh, that looks close to the patern I drew up and have pdf's available for in the main website to download for DIY'ers..
Did I mention that I made several types of patterns so one could drill them themselves and save some cash for more NOS parts...Here ya go.
Say thankyou jason. ;)

http://www.sohc4.net/index.php?q=content/brake-rotor-drilling-templates
Now go save some money and buy NOS parts for your bike, it will thank you later for it. ;D
« Last Edit: September 02, 2009, 09:41:33 AM by goon 1492 »
We are not humans going thru a spiritual experience...
We are spirits going thru a human experience....

Offline goon 1492

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Re: Rotor Drilling
« Reply #16 on: September 02, 2009, 09:40:56 AM »
OH yeah mine.
Man I gotta get mine finished... :'(
We are not humans going thru a spiritual experience...
We are spirits going thru a human experience....

Offline goon 1492

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Re: Rotor Drilling
« Reply #17 on: September 02, 2009, 09:47:23 AM »
I found my thread...
http://forums.sohc4.net/index.php?topic=45058.0
Need defibulation...
We are not humans going thru a spiritual experience...
We are spirits going thru a human experience....

Offline KCRSXTypeS

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Re: Rotor Drilling
« Reply #18 on: September 02, 2009, 10:07:31 AM »
How do you drill them yourself?  Drillpress or hand drill?

Offline Spikeybike

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Re: Rotor Drilling
« Reply #19 on: September 02, 2009, 10:21:17 AM »
How do you drill them yourself?  Drillpress or hand drill?

if you could do it by hand ... i would be seriously amazed

Qingdao

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Re: Rotor Drilling
« Reply #20 on: September 02, 2009, 10:23:06 AM »
How do you drill them yourself?  Drillpress or hand drill?

Don't think it matters as long as you drill slow and don't bend them.  You don't want to muck up a rotor, or any braking component.

And use a quality bit... NO HARBOR FREIGHT. ;)

Offline Spikeybike

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Re: Rotor Drilling
« Reply #21 on: September 02, 2009, 10:25:01 AM »
it definitely matters ... use a drill press !!!     it'll never happen by hand ....   you would give up long before finishing 

Qingdao

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Re: Rotor Drilling
« Reply #22 on: September 02, 2009, 10:28:04 AM »
French curves would help; along with other artsy stuff.  But you could get by with a good ruler.

IDK I have a half horse Craftsman drill from the 50s that would put some modern presses to shame. :D

Offline Spikeybike

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Re: Rotor Drilling
« Reply #23 on: September 02, 2009, 10:41:57 AM »
ok i suppose it's "possible"   but it would take FOREVER ... not to mention, you'd probably have to stop a bunch of times to let the rotor cool down   

Offline KCRSXTypeS

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Re: Rotor Drilling
« Reply #24 on: September 02, 2009, 12:45:57 PM »
How do you drill them yourself?  Drillpress or hand drill?

if you could do it by hand ... i would be seriously amazed

PREPARE TO BE AMAZED! j/k ;D