Author Topic: Those cam chain guide bolts..... What torque values  (Read 125 times)

Online nairb

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Those cam chain guide bolts..... What torque values
« on: December 17, 2025, 02:09:58 AM »
These bolts :-  All 5 of them.  Hex and M6.
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Anybody know what the torque values might be.  I looked in the Clymer manual and the Honda CB450 Factory Service Manual, but missed them if they were there.
I did find a spreadsheet with many useful torque values for much of the bike/frame.  But not found a consistent value.

Ta
Nairb

cb550k3, cl450k5, re5m, xs650xs2, mt500, kettle, gt550 x2, gt380 Kz750 twin, cb360K0 and an old working bicycle

Offline McCabe-Thiele (Ted)

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Re: Those cam chain guide bolts..... What torque values
« Reply #1 on: December 17, 2025, 04:56:43 AM »
Is there not a generic setting for a M6 bolt into aluminium in the manual somewhere that you can use?
Honda CB400NA Superdream (current money puddle)
Honda CB500 K1 (second money pit)
https://www.sohc.co.uk/index.php/topic,28541.0.html
Honda CB400 four super sport (first money pit)
Link to my full restoration http://www.sohc.co.uk/index.php/topic,23291.0.html
This is a neat 500 restoration in the USA.
http://forums.sohc4.net/index.php/topic,151576.msg1731556.html#msg1731556

Offline kevski

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Re: Those cam chain guide bolts..... What torque values
« Reply #2 on: December 17, 2025, 02:28:04 PM »
Go for 5ft lbs, I never torque these small bolts, always done by feel, hand tight then an eighth of a turn

Offline K2-K6

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Re: Those cam chain guide bolts..... What torque values
« Reply #3 on: December 17, 2025, 03:10:05 PM »
Worthwhile to degrease and use blue locktite on them nowadays, obviously not prevalent at time of build.

Online nairb

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Re: Those cam chain guide bolts..... What torque values
« Reply #4 on: December 19, 2025, 04:48:56 PM »
Go for 5ft lbs, I never torque these small bolts, always done by feel, hand tight then an eighth of a turn
yup, I think it must be 5 or 6 ft-ibs.
Clymer gives
6mm bolt, nut 6-9 ft-ibs
A cb500T manual gives
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And another manual? gives
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These bolts are internal to the engine, so once done they cannot be re-visited.

The Suzuki re5 engine rebuild seems to give torque settings for just about everything.  Small or large bolts.

Back then, nobody was thinking 50 years ahead.....



cb550k3, cl450k5, re5m, xs650xs2, mt500, kettle, gt550 x2, gt380 Kz750 twin, cb360K0 and an old working bicycle

Offline McCabe-Thiele (Ted)

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Re: Those cam chain guide bolts..... What torque values
« Reply #5 on: December 19, 2025, 05:46:17 PM »
Some Loctite thread locker will ensure they will not come loose.
Honda CB400NA Superdream (current money puddle)
Honda CB500 K1 (second money pit)
https://www.sohc.co.uk/index.php/topic,28541.0.html
Honda CB400 four super sport (first money pit)
Link to my full restoration http://www.sohc.co.uk/index.php/topic,23291.0.html
This is a neat 500 restoration in the USA.
http://forums.sohc4.net/index.php/topic,151576.msg1731556.html#msg1731556