Rotor Drilling Pattern CB750

[Tetter]

Hi Guys,

I found a picture on the net of an awesome drilled CB750 rotor/ brake disk.

However I cannot find the drilling pattern anywhere, and I'm not skilled to make my own.

Does anybody have this pattern by coinsidence ?
Or can someone make it for me ?

I would be most thankfull for that

 

[Corsair]

The pattern is a set of holes every 30 degrees. Get a protractor from Staples or Office depot or even Wally World, use a sharpie and mark off 30 degree increments around the disc, then use the same technique to do whatever pattern suits you.

Hope this helps.

 

[cyclefreak]

Yep. Laying out that, or any other pattern, isn't as difficult as it sounds. Actually drilling the holes is the real pain in the ass. Do a search on this site for "brake rotor templates" there are a couple threads with some links that may help you out even more!

 

[Tetter]

The pattern looks easy indeed , but it is a pain in the ass.
Can't get it right.

Now counted the degree lines and came to 48! Which is a 7,5degree pattern.....
With a double hole every 4th line.....

Agree ?

Or am i totally lost ?

 

[Tetter]

Got it !

That was it !
7,5 degrees ! duh, need to see this as a 4 hole pattern, instead of a 5 hole, as they are double at the end / beginning.

Then centered the brake area, en put 2 lines per cm above and below, and tadah a 5 hole swirl pattern like the abbove picture.

Now could anybody make this in a digital format ?

The disc is 296mm, the brake erea 56mm
took the middle of the brake area, and put a line there, and on 10 and 20mm

Than the degreees lins per 7,5 degree