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CB650R Overtightened bolt

Rijack

2019
CB650R ABS
Sep 27, 2025
Riding Since
2025
Looking for some thoughts.

Was doing some work on the bike earlier and taking off the really old engine bars.

When doing so, all the bolts I removed were rusted etc etc - not a huge issue as gave them a bit of a clean but when tightening everything back up, I think I overnighted the number 9 bolt in this screenshot.
(BOLT, SOCKET, 10X30
90105-MJE-D00)

I have a feeling something stripped either on the bolt or more likely on the bracket that it screws into.

Yes I can replace the bracket, but given the bolt sticks through an open hole out the back, can I just get a m10x1.25 thread nut and a washer and tighten it from the rear as a workaround for now?

Would a 1.25 m10 be right? From what I can see most nuts on a jap bike such as a Honda are 1.25
 

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MacRoadster

2024
CB650R E-Clutch
Sep 5, 2024
Riding Since
1993
You have all the bolts and nuts in the shop manual, here on the site, and you can also check their torque values (section 1-11).

For the standard ones...

1774304585055.png
 

Rijack

2019
CB650R ABS
Sep 27, 2025
Riding Since
2025
You have all the bolts and nuts in the shop manual, here on the site, and you can also check their torque values (section 1-11).

For the standard ones...

View attachment 16938


Finding the correct bolt wasn’t the issue as I know what one I need but this bolt I’m talking about doesn’t have a nut as standard.

My query is more whether that’s a potential solution to add a nut (of the correct thread pitch so to not do any further damage) on the back of the bolt that sticks out, or whether my only option is to replace the bracket or helicoil (which I’m keen to avoid).

The second part of the query is around thread pitch. I can’t just chuck on a nut that’s the right “size” from b&q as I’m assuming it might do more damage to the threads on the existing bolt.

Edit: unless you mean 11-1 has the info on thread pitch etc which I will look into on the laptop tonight :)
 
Last edited:

miweber929

2014
CBR650F
650 Alumnus
Staff
Feb 13, 2015
Woodbury, MN
Riding Since
1975
The best permanent solution is to replace the bracket, I doubt it’s stupid expensive. The nut should be fine, easiest way to know the size if it’s not listed in the parts fiche is to take the bolt to the hardware store and match it up. No guessing test way.

Personally I’d do the nut as a temp solution until my bracket came in.
 

MacRoadster

2024
CB650R E-Clutch
Sep 5, 2024
Riding Since
1993
The second part of the query is around thread pitch. I can’t just chuck on a nut that’s the right “size” from b&q as I’m assuming it might do more damage to the threads on the existing bolt.

Edit: unless you mean 11-1 has the info on thread pitch etc which I will look into on the laptop tonight :)
Only has the thread diameter, not sure if it helps :rolleyes:

1774360358668.png
 

Rijack

2019
CB650R ABS
Sep 27, 2025
Riding Since
2025
The best permanent solution is to replace the bracket, I doubt it’s stupid expensive. The nut should be fine, easiest way to know the size if it’s not listed in the parts fiche is to take the bolt to the hardware store and match it up. No guessing test way.

Personally I’d do the nut as a temp solution until my bracket came in.
I think the bracket was about £80 on fowlers so not the end of the world. Think I might just do a nut for now for peace of mind until I’m ordering a few bits together

At the min I’m still not sure on any impact. I’ve ridden 4 or so times since this silly mistake and nothing has budged, bolt is still just as tight.. I guess the issue might be more when it comes to if I need to ever remove it again for any reason
 
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