After drilling mine I sanded the rotor with a DA sander with 180 grit paper to remove burrs. That worked real well by keeping the sander flat and moving.
Scott
Scott
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Jim's 1980 SG Miss September
- Thread starter Jim
- Start date
Not sure if they're the same or not, Scott. Some of the holes (on the template) weren't perfectly centered... in which case I just kinda eyeballed the center punch. It ain't gotta land on the Moon... as we used to say in the airplane world... so the good ol' Mk.I eyeball was good enough.
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Next time you see a Harley, check out their drilled rotors. There is no pattern.
Holey Moley!
....are we surprised?
That is looking really nice Jim! Careful, drilling holes seems to be something of an addiction, just ask Phil! 
By the way, I got a nice finish in my disk using an abrasive pad in my drill. Using a light touch and trying to keep a consistent cross hatch pattern.
By the way, I got a nice finish in my disk using an abrasive pad in my drill. Using a light touch and trying to keep a consistent cross hatch pattern.
Thanks Bob. Yeah.... in my drilling post, I almost referred to it as the "halfmile treatment." 
I have an extra rotor here for your 77D. Like Randy sez.... 'cmon.... keep up.
I have an extra rotor here for your 77D. Like Randy sez.... 'cmon.... keep up.
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Hi Pete,
FWIW, as long as the holes sweep the pad area and are spaced so that the disk ain't off balance the brake neither knows nor cares what the pattern is.
Only one's sense of aesthetics gives a damn.
Dual Drilled Disc's... Round 2.
Took drilled and undrilled disc's and bolted 'em together. A little tap tap here and there for alignment....
Set the two on the drill press and dimpled the undrilled rotor at each hole...
...and commenced to drillin' another 84 holes.... Phew...
Finally... wait for it.... the last hole.
And then.... here we are.... two identical (mirrored) drilled rotors.
Took drilled and undrilled disc's and bolted 'em together. A little tap tap here and there for alignment....
Set the two on the drill press and dimpled the undrilled rotor at each hole...
...and commenced to drillin' another 84 holes.... Phew...
Finally... wait for it.... the last hole.
And then.... here we are.... two identical (mirrored) drilled rotors.
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Snazzy Jim!
You are the Rotor King (both kinds).
You are the Rotor King (both kinds).
Fork bag finally showed up. It's actually quiet well made.... and smells awesome.
Followed Scott's lead and used zip ties. Wrapped 2 layers of black gorilla tape around the forks and used 3 good quality ties per side. I think that'll work just fine.
I now have storage space for my reg. and ins. documents... and maybe a pack of gum...
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G'day Jim,
Nice looking bag, no trouble with fork travel???
GeeDub
Dual Disc Front Brakes. A Start To A Better Stop.
So, Randy (@Machine ) has a left front brake caliper headed my way. Better get busy....
Forum member @thelowlife wrote a thread way back in 2011 with various patterns for drilling rotors. He even included a scale for checking your printout. I scaled 'em a tad small at 99.5%. That worked out perfect. Printed 'em out and started cuttin'...
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As was pointed out in the thread, to cover all the swept area, you need to delete the inner hole and add an outer. Taped 'em in place...
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.... and center punched all the holes.
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I decided on 1/4" holes... if for no other reason than I have plenty of 1/4" drill bits. Yeah... I know, cheap sob ain't I?
Set the first rotor on the drill press and went to town....
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84 holes later....
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Not sure how long it took. Several hrs maybe. Start to finish with the same drill bit.
Drill bit says it can do both rotors... but we all know how drill bits lie.We'll see. One down, one to go.
G'day Jim,
Is it possible for you to send your patterns to a poor old bloke from the Antipodes??
GeeDubya
Need to buy some chopsticks to rid the flies from your house in the summer Daniel San.
I wanted to put a drilled one up against the bike and see if I liked it. Didn't see any point in deciding I didn't like two of 'em.
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