Getting my front Brembo's set up on stock 12.8 rotors and my spacing does not look right. Just going by the SpeedKings recommendation of 70mm I am hanging way off the rotor. Where should I be measuring from and to, to get the setup correct?

FYI, those bolts are not torqued.

 

That looks like it's for a 13 inch rotor. When you say stock 12.8 I think you mean 11.8. Because that's what 06-up dynas had.

When I used speedmerchant caliper brackets like yours, I used .150 thousandths shims

 

Just look at the pad and disc relationship. Simple as can be, pad covers disc. Space as needed.

 

11.8 yes, lots of drinking thia weekend. The shims are 10mm each so I can get there.

 

As mentioned above you want to cover the the disc with the entire brake pad. We have seen what happens when people get it wrong. Luckily it was on a dirt bike so the penalty wasn't too harsh. The measurements you get from these companies are really just a go by. When I did this with the speed merchant stuff we ended up making our own spacers as they just provided stamped out washers for spacers. With all the money we put into our bikes I thought it was a bit chincy to roll around with a stack of washers for spacers. Looks like the shims you were provided with are at least finished

 

Your best bet is to add shim until the pad sweep is correct.

As stated above I think that rolling around with a stack of washers in there looks awful ( no offence ). I used the provided washers to get my spacing correct, mic'd the stack then cut a piece of aluminum round stock to match. If you don't have access to cutting a single spacer there are TONS of precut aluminum spacers on amazon/eBay.

 

Thanks guys, I don't understand sweep (can you explain?), but I can adjust the spacing to get the pads on the rotor where they should be. As for the spacers, my first thought was that I'd just keep them on so I could change my rotor size in the future, but now that they're on the bike even though they were expensive and are each very, very well made, it doesn't look as good as it could. I'll probably order the exact size from AluminumSpacers.com and have them powdered. EDIT: just saw your link @brownie4412 that's awesome!

 

Alright, I dropped down to 30mm and I think this is where I need to be. Pic isn't so great but the outer edge of the pad is pretty closely following the marks on the rotor. I'm going to have to reach out to SpeedKings though since the ARP hardware is too long now and it's bottoming in the bracket. Since they were the ones that recommended the 70mm kit I hope they'll swap it without complaint.

EDIT: I've been misstating the spacing distance. It was called a 70mm kit because the bolt length is 70mm, each spacing shim is 2.5mm, not 10mm, never been a fan or metric anything even though I'm an engineer by trade...anyhow, I'm at 7.5mm of spacing.

 

If there is enough thread on the ARP's you can shorten the existing bolts and save money.

 

You can put a spacer on the head side of the bolt to take up space if you need to. Not ideal but it works.

It is hard to see from the pics but you want the edge of the disc to be at least at the top of the brake pad. It can be past the pad a little and be fine as long as the caliper interfere with the disc or the bottoms of the pads go beyond the bottom of the disc. What you don't want is any part of the pad going beyond the edge of the disc. It takes a while but as the pad wears the parts that don't make contact with the disc will eventually make contact with the other pad and then you have a nice firm lever but no braking force.