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Thread: This is my CBR250R, There are Many Like It, But This One Is Mine Reply to Thread
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  Topic Review (Newest First)
07-16-2018 01:31 PM
bageland2000
Quote:
Originally Posted by tegs View Post
From my experience with the oil filter casing, the bolts stretch before they break. You might want to take the bolts out and examine them to make sure they aren't deformed or damaged.

If they're standard bolts, they should be fine, but I tend to be paranoid about things breaking and causing a crash at highway speed.
It's so hard to get a concrete answer on torque pressure that I think I'm going to leave them. I used Loctite, so I don't think they're coming out. Maybe I'll take it into Honda at some point down the road and ask them about the pressure.
07-16-2018 01:27 PM
tegs
Quote:
Originally Posted by bageland2000 View Post
Well, nothing "happened" when I finished torquing them. I'm assuming that if I did something to them I would have known when I went too far/applied too much torque?
From my experience with the oil filter casing, the bolts stretch before they break. You might want to take the bolts out and examine them to make sure they aren't deformed or damaged.

If they're standard bolts, they should be fine, but I tend to be paranoid about things breaking and causing a crash at highway speed.
07-16-2018 11:24 AM
bageland2000
Quote:
Originally Posted by tegs View Post
If it's a 10 mm flange bolt, the service manual says it should be torqued to 39 Nm or 29 ft-lbs.

Don't take that as gospel, though. The torque value the service manual gives for the oil filter casing bolts will snap them like twigs.
Well, nothing "happened" when I finished torquing them. I'm assuming that if I did something to them I would have known when I went too far/applied too much torque?
07-16-2018 11:12 AM
tegs If it's a 10 mm flange bolt, the service manual says it should be torqued to 39 Nm or 29 ft-lbs.

Don't take that as gospel, though. The torque value the service manual gives for the oil filter casing bolts will snap them like twigs.
07-14-2018 10:56 PM
bageland2000
Quote:
Originally Posted by jkv357 View Post
For that bolt you would want to use a 3/8" ratchet gripped at the end to get it "snug" if you weren't using a torque wrench.
That's what I used. I went a little tighter than you described, but not much. Guess I'll just hope nothing comes up in the future, but it sounds like I tightened it pretty close to where it needed to be.
07-14-2018 10:13 PM
jkv357
Quote:
Originally Posted by bageland2000 View Post
Here's the Puig R12 Installation instructions.

https://www.revzilla.com/assets/0001...me_sliders.pdf

They're M10 screws according to this guide. I torqued them to 54Nm (actually about 52 because I used blue Loctite), which using my click torque wrench, I had to put a considerable amount of force on to get to 54Nm. I don't THINK I did any damage, but who knows. Does that torque pressure sound right? God, I really hope I didn't do any damage.

It does look more like a M10 - it has a 12mm or 14mm head then?

477 inch pounds or 39.8 foot pounds is the English equivalent to 54 Nm. The chart said 51 Nm for an 8.8 grade bolt, so it's real close.

For that bolt you would want to use a 3/8" ratchet gripped at the end to get it "snug" if you weren't using a torque wrench.
07-14-2018 06:38 PM
bageland2000
Quote:
Originally Posted by jkv357 View Post
It's got a 10mm head, but the actual bolt size is most likely M6 (just a guess). That's the measurement in mm if the diameter of the actual bolt shaft.

It's not a critical bolt, so "snug" is most likely adequate. You need to get a feel for how tight to make bolts. The smaller bolts can be tightened with a 1/4" drive ratchet, and medium bolts with a 3/8" drive ratchet - but not using the very end of the ratchet.

The chart says 10.5 Nm (88.5 inch-pounds) for a M6 bolt of a pretty much standard 8.8 grade.

There are numerous times where trying to reach the actual torque value listed in a service manual can cause problems. There have been instances of CBR owners breaking smaller bolts (M5 or so) when torqueing to the recommended spec.

My son replaced a sprocket on his cycle and the factory torque spec sounded to high too me, but he tried anyway. Stripped 4 before he stopped (I would have stopped him after the first if I were there...). Had to replace the sprocket carrier and torque to a standard spec instead of the "over-torque" factory spec.
Here's the Puig R12 Installation instructions.

https://www.revzilla.com/assets/0001...me_sliders.pdf

They're M10 screws according to this guide. I torqued them to 54Nm (actually about 52 because I used blue Loctite), which using my click torque wrench, I had to put a considerable amount of force on to get to 54Nm. I don't THINK I did any damage, but who knows. Does that torque pressure sound right? God, I really hope I didn't do any damage.
07-14-2018 06:31 PM
jkv357
Quote:
Originally Posted by bageland2000 View Post
Thanks, that'r really helpful. It's a 10mm bolt, but I have no idea what the "strength grade" is.
It's got a 10mm head, but the actual bolt size is most likely M6 (just a guess). That's the measurement in mm if the diameter of the actual bolt shaft.

It's not a critical bolt, so "snug" is most likely adequate. You need to get a feel for how tight to make bolts. The smaller bolts can be tightened with a 1/4" drive ratchet, and medium bolts with a 3/8" drive ratchet - but not using the very end of the ratchet.

The chart says 10.5 Nm (88.5 inch-pounds) for a M6 bolt of a pretty much standard 8.8 grade.

There are numerous times where trying to reach the actual torque value listed in a service manual can cause problems. There have been instances of CBR owners breaking smaller bolts (M5 or so) when torqueing to the recommended spec.

My son replaced a sprocket on his cycle and the factory torque spec sounded to high too me, but he tried anyway. Stripped 4 before he stopped (I would have stopped him after the first if I were there...). Had to replace the sprocket carrier and torque to a standard spec instead of the "over-torque" factory spec.
07-13-2018 03:08 PM
bageland2000
Quote:
Originally Posted by lemmy99 View Post
Thanks, that'r really helpful. It's a 10mm bolt, but I have no idea what the "strength grade" is.
07-09-2018 11:09 AM
lemmy99 Try here

STANDARD BOLT TIGHTENING TORQUE
This thread has more than 10 replies. Click here to review the whole thread.

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