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Torque Specs for Brake Rotor Bolts?

RustyTank

RustyTank

Forum Mentor
Past Site Supporter
I’m replacing my 1979 GS850 brake rotors with rotors off a GS1100, direct bolt in. Does anyone know what the recommended torque spec is for the rotor bolts? In my manual it just says “tighten bolts securely”, but that seams suspect to me. I’ve over tightened to many bolts in my day to assume that a simple hand tighten is the safe route to go here. Looking at the torque specs page in my manual the only thing that remotely looks like it may be referring to the rotors is a ‘Disc mounting bolt’. I’m just unsure that’s what I’m looking for :-k

U2PzRoPl.jpg
 
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RustyTank said:
I’m replacing my 1979 GS850 brake rotors with rotors off a GS1100, direct bolt in. Does anyone know what the recommended torque spec is for the rotor bolts? In my manual it just says “tighten bolts securely”, but that seams suspect to me. I’ve over tightened to many bolts in my day to assume that a simple hand tighten is the safe route to go here. Looking at the torque specs page in my manual the only thing that remotely looks like it may be referring to the rotors is a ‘Disc mounting bolt’. I’m just unsure that’s what I’m looking for :-k

U2PzRoPl.jpg
Click to expand...
They're 8mm bolts, so 11-18 ft / lbs is about right into ally. If you don't have the tab strips for bending over the bolt heads, use some Loctite (purple) or drill and wire the bolts. I'd use Loctite as well as anything else, as a belt and braces approach.
 
Grimly said:
They're 8mm bolts, so 11-18 ft / lbs is about right into ally. If you don't have the tab strips for bending over the bolt heads, use some Loctite (purple) or drill and wire the bolts. I'd use Loctite as well as anything else, as a belt and braces approach.
Click to expand...

I do have the tab strips Grimly, but the Loctite info is great for future reference. I gotta start writin this sh** down :idea:
 
RustyTank said:
I do have the tab strips Grimly, but the Loctite info is great for future reference. I gotta start writin this sh** down :idea:
Click to expand...

Reason I specify purple is it's what I use - a medium strength one *. You don't need the red Loctite on these, especially if you've got the tabs. The high strength red can be awkward to remove if you ever have to.

* I see Loctite now designate the Purple as a low-strength one, but my bottle says Medium. No matter, it works anway.

https://www.henkel-adhesives.com/nz...ts/blog/difference-between-threadlockers.html
 
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