Author Topic: Primary drive chain guides question.  (Read 605 times)

Online McCabe-Thiele (Ted)

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Primary drive chain guides question.
« on: March 23, 2021, 03:38:44 PM »
My primary chain guides certainly look original one has small lines/marks on it (bottom guide) the other is unmarked. Do I replace them anyway due to age hardening?
Honda CB500 K1 (new pit dug out ready)
Honda CB400 four super sport (first money pit)
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Offline Nurse Julie

  • 1977 CB550/4 Mongrel Brat. 1974 UK 500/4 K1. Honda CD250u.
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Re: Primary drive chain guides question.
« Reply #1 on: March 23, 2021, 05:11:37 PM »
No Ted, use them again. Once you have fitted the new Hyvo, the chain literally only just kisses the bottom guide, they are there to protect the cases more than anything.
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Offline taysidedragon

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Re: Primary drive chain guides question.
« Reply #2 on: March 23, 2021, 05:28:36 PM »
If they don't have much wear you can use again. Min thickness is 5mm iirc.
I'm sure the 2 in your spare engine are good to use.
Gareth

1977 CB400F
1965 T100SS

Online McCabe-Thiele (Ted)

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Re: Primary drive chain guides question.
« Reply #3 on: March 23, 2021, 07:24:35 PM »
Thanks for the replies - replacements are pricey for what they are. The chain was well worn so even in that state it had clearly barely touched the guide. I'm looking to repair the horseshoe guide basically it appears to be carboned up with burnt oil.
Honda CB500 K1 (new pit dug out ready)
Honda CB400 four super sport (first money pit)
Link to my full restoration http://www.sohc.co.uk/index.php/topic,23291.0.html

 

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