HarleyTechTalk

Technical Forums => General => Topic started by: xlfan on January 13, 2022, 04:02:26 AM

Title: Inner primary cover fastener #786A
Post by: xlfan on January 13, 2022, 04:02:26 AM
Has anyone measured the claimed by the Moco stretch of the 786A after torqued to 25-27 ft/lbs? Which necessitate new fasteners at every dissasembly?
Title: Re: Inner primary cover fastener #786A
Post by: Schex3x on January 13, 2022, 06:37:10 AM
Harley likes selling bolts, never replaced one, you can get new seals for them. I reuse the cover gasket also if it's not damaged, over and over.

https://www.denniskirk.com/genuine-james/inner-primary-seal-for-786a-bolt-31434-06.p140089.prd/140089.sku
Title: Re: Inner primary cover fastener #786A
Post by: Karl H. on January 13, 2022, 11:47:04 PM
A steel bolt in aluminum will never stretch ;-)

Karl
Title: Re: Inner primary cover fastener #786A
Post by: HighLiner on January 14, 2022, 05:29:56 AM
I would guess it's more of a seal integrity than bolt stretch concern but if you can get new seals I'd run it.
Title: Re: Inner primary cover fastener #786A
Post by: Thermodyne on January 19, 2022, 02:14:23 PM
It's not a stretch issue.  It's about preinstalled thread locker and seals.  It's cheaper for shops to just replace them as opposed to cleaning and reapplying the locker.  You can buy new seals, just not from Harley, last I looked.
Title: Re: Inner primary cover fastener #786A
Post by: Ohio HD on January 19, 2022, 02:59:52 PM
I reuse them and buy the James #31434-06. It's the seal only. The same part number at HD is the bolt and seal. I don't use OEM thread sealant anyway, I use what I chose and how much I want on the fasteners. I clean off the thread sealant from new bolts from HD when I buy them.
Title: Re: Inner primary cover fastener #786A
Post by: Pirsch Fire Wagon on January 20, 2022, 03:59:42 AM
Quote from: Karl H. on January 13, 2022, 11:47:04 PMA steel bolt in aluminum will never stretch ;-)

Karl

I'm sure many (including myself) have discovered this to be TRUE
Title: Re: Inner primary cover fastener #786A
Post by: Buglet on January 20, 2022, 05:33:04 AM
  The worst part is the James seals list for more them what the Harley bolts with the seals sale for.
Title: Re: Inner primary cover fastener #786A
Post by: xlfan on January 20, 2022, 08:06:32 AM
Quote from: Buglet on January 20, 2022, 05:33:04 AMThe worst part is the James seals list for more them what the Harley bolts with the seals sale for.

That might be because the James seals lists for a 10-pack.
Title: Re: Inner primary cover fastener #786A
Post by: Buglet on January 20, 2022, 08:21:21 AM
   James retail price list is $3.95 each, not $3.95 for the pack of 10. 786A list for $3.49 each last I check.
Title: Re: Inner primary cover fastener #786A
Post by: SP33DY on January 20, 2022, 08:33:17 AM
Go to Cyco Gaskets, "CY786FKMRED 20 Pack" is $1.76
Cyco Gaskets (https://cycogasket.com/catalogsearch/result/?q=CY786FKMRED+20+Pack)