Daytona Special dual disk brakes?

[Daytona Z]

Hey all; Im in the process off bringing back my Daytona. I know they all came with a single front disk; but I was wondering if anyone out there has been able to convert it to a dual front disk? Im trying to keep the 35mm forks and have been all over the net. Mikes xs other cross referencing applicability. Has anyone done this and have the recipe for success? And if so... Pics? Thanks in advance.

[triple1972]

Hi I certainly don't have a recipe for these but the brakes on a Daytona are more than capable on a bike of this weight. I did have mine drilled mainly for the bling and they look nice but the added weight of the disc and caliper etc.. in my opinion is not worth it. Just my opinion.

[pdxjim]

Upgrading the caliper and rotor are a much better idea.

[The Red Scourge]

Upgrading the caliper and rotor are a much better idea.

That's what I've always been told.  Another caliper, rotor and mount will add a lot of extra weight.

[pdxjim]

Upgrading the caliper and rotor are a much better idea.

That's what I've always been told.  Another caliper, rotor and mount will add a lot of extra weight.

Dual discs look cool, but weigh a ton.  A modern rotor and caliper combo weigh much less and stop way better than the OG setup. 

[Daytona Z]

I realize theres are those that will say the stock single is capable. Im aware of that since it stopped before I tore it apart. I do have an upgraded drilled rotor. Weight is not an issue. But I am trying to get that dual disk for for my personal wants. Anyone out there?

[busa1300]

The SR500 had a disc on the other side...but I don"t remember what size the tubes were though.
XS750 front...?

[Seizer]

Dual disc. 35mm forks. You'd need a lower triple and stem but that's easy to locate. DM me if you're interested. 

[Dxrat]

I realize theres are those that will say the stock single is capable. Im aware of that since it stopped before I tore it apart. I do have an upgraded drilled rotor. Weight is not an issue. But I am trying to get that dual disk for for my personal wants. Anyone out there?

Are you trying to keep the cast wheels? There is a spoked front hub with dual discs and a 14mm axle. I have to look around a bit, I forgot what bike it was used on. There are some xs400 cast wheels that have dual discs but I think they are 17mm axles.

[SUPERTUNE]

Early RD's up to the Daytona's used 17mm axles. The '79 Daytona Special front dropped to a 15mm axle.
Chuck

[Daytona Z]

Thanks for the input fellas! I was trying to keep the stock cast wheel but I'm open to options. Thanks Chuck!

[oxford]

Any one have a master cylinder recommendation for dual disc with stock RD calipers?

[SUPERTUNE]

Have you read this?


https://www.vintagebrake.com/mastercylinder.htm

[SUPERTUNE]

I personally like my ratio #'s to be 23:1 
Not wooden like a stock RD400 at 18:1 (48mm x 2 pistons using a 5/8 or 16mm) Excluding the Daytona Special model
On stock RD's mostly I drop the stock master cylinder from a 5/8 or 16mm to a 14mm master for a 23:1

if you like a more powerful 2 finger lever a 13mm is better at 27:1


Micheal likes close to 27:1 and I don't like it that powerful and soft.


Stock RD caliper are 48mm X 2 pistons
If you follow that, at using 48mm x 4 pistons with a 19mm master you'll be in the right area at 25:1
This is the reason most modern calipers have to use much smaller caliper pistons as I don't think there are huge car like master cylinders available for motorcycles and smaller is lighter.

[Daytona Z]

Thanks Chuck! Thats all good info I hadn't considered to that degree!