Andrew Shadow
Site Supporter
Honda ST1300 service manual.where did you get those numbers,.012 is a lot.
Honda ST1300 service manual.where did you get those numbers,.012 is a lot.
that's in mm not inches which is less than .001 in inches. lateral run out and thickness variation is critical to smooth brake operation. M/C spec are tighter that I thought.Honda ST1300 service manual.
No it is not.that's in mm not inches which is less than .001 in inches.
Actually, in this case at least, motorcycle specifications are much looser than most car specifications that I am familiar with.lateral run out and thickness variation is critical to smooth brake operation. M/C spec are tighter that I thought.
that's in mm not inches which is less than .001 in inches. lateral run out and thickness variation is critical to smooth brake operation. M/C spec are tighter that I thought.
Wow .. I can't believe it but your right,No it is not.
The specifications from the Honda ST1300 service manual are;
Front brake disc warpage- 0.20 mm, 0.008".
Rear brake disc warpage- 0.30 mm, 0.012".
See the attached page from the Honda ST1300 service manual.
Actually, in this case at least, motorcycle specifications are much looser than most car specifications that I am familiar with.
Lateral run out becomes critical if it is beyond the allowable specification. Up to the allowable specification the design of the floating caliper brake system is such that the ability of the caliper to move with the rotor is supposed to be able to absorb the run out. If it can't there is something else wrong or the specification is wrong. I do find this specification to be very liberal compared to most cars which are, as you mentioned, in the 0.003" range.
Most cars also have a tight tolerance for rotor thickness variation as well. It is less critical on a motorcycle rotor. It would seem that Honda doesn't consider rotor thickness variation to be very critical at all on the ST1300 as they didn't bother to provide a tolerance for it- or I haven't found it in the manual.