So all of the second guessing is a bit silly. It was built by one of THE premeir motorcycle engineers of any era ever (Yoshimura). This bike wasn't built by some muppet on the internet. It was designed by Pops Yoshimura and ridden by Wes Cooley at speeds in excess of 165mph on an 'every weekend' basis in the AMA Superbike Production class (it's a Suzuki GS1000). Ok, I think what some of you are missing here is that bike was built in 1977. If you're buying new discs, then the extra cost of drilled ones is minimal.Pre-drilled disks are in excess of $275 EACH for the bikes I ride. It looks like a fashion accessory, rather than a performance enhancement.ĭrilling used stainless discs is a nightmare due to the work hardening. More surface area has been lost than has been gained. The front disc doesn't have a staggered hole pattern, which will lead to grooved pads/discs.

On car discs, I only ever groove, not drill.

The usual recommendation is to only drill new discs. Brake Repair in Garden Grove more than 18 million people have chosen Mechanic Advisor Auto California Garden Grove Auto Best Match Ratings Distance Price Coupons exclusive coupons & offers detailed business information user testimonials & reviews Nearby Locations Garden Grove Midway City Westminster Stanton Anaheim Fountain Valley Show More. Drilled discs can be more prone to cracking, particularly if they've been drilled to try and cure an over heating problem.

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