Front brake bolt pattern?

[levdir]

Does anyone know the measurements for the front brake bolt pattern? Do bike brakes have standardized patterns the way car wheels do? I can measure my bike's brakes but I'd rather not pull the front end apart if someone already knows.

 

[xschris]

What do you mean by pattern? The torque of the bolts for the disc? Or how to tighten them? Disc bolts are 14.5lbs and you want to do a star pattern when you do.

 

[levdir]

No, like, the space center-to-center between bolts. My Jetta's wheels had a 4x110mm (4 bolts, 110mm between bolthole centers) pattern. Are there standard patterns like that for brakes? I want to find a 310mm brake disc with a bolt pattern that matches the stock front mag. The brakes on Drewpy's bike suggests that such a thing exists, but I don't have numbers to start from. 6xsomething.

 

[xschris]

Why not measure the one you have?

 

[levdir]

My bike lives in my friend's garage, I figured I'd ask here first because I won't be over there for a bit.

 

[XSLeo]

Your Xs400 uses the same bolt pattern as most Yamaha's of that era. Like an XS650. I Don't know how to link to it, but over there is a list of rotors of other brands of rotors that have the same bolt pattern.
Go on over to the XS650.com search and yea shall find.
Leo

 

[levdir]

Thanks, Leo, I'll head that way.

EDIT: For others' future reference, here's the masterlist Leo is talking about. The XS650 and XS400 have a 6x80mm bolt pattern. http://dotheton.com/index.php?topic=6437.0

 

[XSLeo]

The XS650.com site is just about like this one. Sign up. A lot of the way things work is the same on both bikes. A lot of part interchange. Brakes are just one.
Leo

 

[levdir]

This list is for 320mm rotors, but intuitively it seems as though R6 calipers mounted on an R6 fork bracket with a 10mm longer bolt and a 10mm spacer should all play nice together, assuming the distance along the axle is spaced correctly, yes?