Honda-SOHC

SOHC.co.uk Forums => CB500/550 => Topic started by: paulbaker1954 on March 23, 2017, 03:23:23 PM

Title: Repeated Top yoke breakages
Post by: paulbaker1954 on March 23, 2017, 03:23:23 PM: Help
I have now had 2 top yokes break in one year. The first time I pit it down to me forgetting to tighten it up but now I have just had another one break

Fracture occurs on the right hand fork side at the rear of the bracket

Forks are true, no looseness in steering head, handles perfectly and jus MOTD

What is going on ?
Title: Re: Repeated Top yoke breakages
Post by: mickwinf on March 23, 2017, 03:32:14 PM: have you fitted the special thick washer in the gap to prevent over tightening?
Title: Re: Repeated Top yoke breakages
Post by: Trigger on March 23, 2017, 04:14:34 PM: D washer spings to mind
Title: Re: Repeated Top yoke breakages
Post by: paulbaker1954 on March 23, 2017, 04:41:27 PM: Aha that explains it then👌👌👌

When I got the bike these must have been missing, I see them now on the parts list

Do I need to buy them ad special washers i.e. Does anyone know the thickness so I can use a std washer of that thickness?
Title: Re: Repeated Top yoke breakages
Post by: deltarider on March 23, 2017, 04:42:08 PM: D washers or use the 7mm bolts as used on the CB500/550 K2 '76. Honda had a reason for this modification...
Title: Re: Repeated Top yoke breakages
Post by: Chris400F on March 23, 2017, 05:09:20 PM: Found this which should help: http://www.sohc.co.uk/index.php?topic=9241.0
Title: Re: Repeated Top yoke breakages
Post by: paulbaker1954 on March 23, 2017, 05:18:22 PM: Ordered from DS to be safe

Bit steep at 5.50 each but better than another yoke in the future!!!
Title: Re: Repeated Top yoke breakages
Post by: Seabeowner on March 23, 2017, 05:25:41 PM: I found the washers on the head studs are as near a dammit. But used my 500 in ignorance for a few years. Perhaps I'm just a weakling.
Title: Re: Repeated Top yoke breakages
Post by: Tomb on March 23, 2017, 05:55:35 PM: I learn something new every day on here, I have no washers in my yoke, owned it for 32 years and didn't know. No other bikes I've ever owned have these type washers, I guess I tighten them just the right amount not to cause breakages
Title: Re: Repeated Top yoke breakages
Post by: deltarider on March 23, 2017, 06:16:06 PM: Quote
I have no washers in my yoke, owned it for 32 years and didn't know.
What model year?
Title: Re: Repeated Top yoke breakages
Post by: paulbaker1954 on March 23, 2017, 08:55:32 PM: Mines a 71 USA Spec K0
Title: Re: Repeated Top yoke breakages
Post by: royhall on March 24, 2017, 08:07:19 AM: Cant add anything but Crikey, the amount of Honda knowledge on this forum is stunning. Where else would you find detailed information like that. Well done guys.
Title: Re: Repeated Top yoke breakages
Post by: paulbaker1954 on March 31, 2017, 01:27:36 AM: Lady luck has blessed me !!

The day the yoke fractured i got a replacement off fleabay auction for £15 (i was only bidder). The seller was in York is this a member here??

Hopefully with my outrageously expensive D washer from DS all will now be sorted