Author Topic: Vesrah gasket kits CB750 K1  (Read 1047 times)

Offline WestYorkshireBiker

  • SOHC Associate
  • Posts: 72
    • View Profile
Vesrah gasket kits CB750 K1
« on: September 18, 2020, 06:21:10 PM »
Long shot but I've ordered a Vesrah gasket set from Dave Silver for my 1971 K1, the part number of which (VG-157) does match the number on web site when searching for the K1. But the actual kit says it's for K4 / 5. Will this fit (to save me an email in Monday!!)? The 'actual' K1 is VG-156 after searching the interwebs. Ta.

Sent from my ONEPLUS A6013 using Tapatalk

OW MUCH????????????

Online AshimotoK0

  • Moderator
  • Grogu
  • *
  • Posts: 7355
  • Mad Scientist.... more power Igor ! ٩(̾๏̮̮̃̾๏̃̾)۶
    • View Profile
Re: Vesrah gasket kits CB750 K1
« Reply #1 on: September 18, 2020, 06:29:23 PM »
Trigger is your man on this but as far as I know the K1 head gasket is different as later bikes had extra 'knock pins' between the head and barrels.

Honda did issue a Bulletin on this but it involved a square section 'O' ring seal which were NLA the last time I checked but appear to be here as non-pattern parts.

https://www.ebay.com/itm/NOS-Genuine-Honda-Cylinder-Stud-Bolt-O-Ring-Gasket-Set-Of-8-CB750-12115-300-305/372703849304?_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D2%26asc%3D20160323102634%26meid%3D6570773f549948e5abc587383f24e6f9%26pid%3D100623%26rk%3D5%26rkt%3D6%26sd%3D283152633851%26itm%3D372703849304%26pg%3D2047675&_trksid=p2047675.c100623.m-1

[ Guests cannot view attachments ]
« Last Edit: September 18, 2020, 06:52:30 PM by AshimotoK0 »
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline Trigger

  • Grogu
  • *
  • Posts: 8434
  • Engines built on reputation, not advertising.
    • View Profile
Re: Vesrah gasket kits CB750 K1
« Reply #2 on: September 18, 2020, 07:35:39 PM »
CB750 head gaskets are a minefield, at least 3 different types fitted between 1969 and 1979  :o

For a 750K1 you need a Vesrah VG156 or you can use a VG157 and upgrade it with O'rings but not the ones in Ash's link ( they are only for Honda orginal head gaskets ) . With any after market gasket set, you can't use the O'rings supplied with the gasket set on the head or base gasket as they will not seal.

One of the hardest things is to get all the oil ways to seal up on any early CB750. If you need any upgraded O'rings to do this job, i hold stock of them  ;)



Online AshimotoK0

  • Moderator
  • Grogu
  • *
  • Posts: 7355
  • Mad Scientist.... more power Igor ! ٩(̾๏̮̮̃̾๏̃̾)۶
    • View Profile
Re: Vesrah gasket kits CB750 K1
« Reply #3 on: September 18, 2020, 08:01:31 PM »
Cheers for clarification Graham.

Is the Vesram gasked decent quality? Is that what you fit?
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline WestYorkshireBiker

  • SOHC Associate
  • Posts: 72
    • View Profile
Re: Vesrah gasket kits CB750 K1
« Reply #4 on: September 18, 2020, 08:16:50 PM »
CB750 head gaskets are a minefield, at least 3 different types fitted between 1969 and 1979  :o

For a 750K1 you need a Vesrah VG156 or you can use a VG157 and upgrade it with O'rings but not the ones in Ash's link ( they are only for Honda orginal head gaskets ) . With any after market gasket set, you can't use the O'rings supplied with the gasket set on the head or base gasket as they will not seal.

One of the hardest things is to get all the oil ways to seal up on any early CB750. If you need any upgraded O'rings to do this job, i hold stock of them  ;)
Thanks. I'll get in touch with DS in the first place for the correct set as their website looks to have the wrong part for the K1 at least. Then I can send it back and get the correct one.  Thanks.

Sent from my ONEPLUS A6013 using Tapatalk
« Last Edit: September 18, 2020, 08:36:39 PM by WestYorkshireBiker »
OW MUCH????????????

Offline Trigger

  • Grogu
  • *
  • Posts: 8434
  • Engines built on reputation, not advertising.
    • View Profile
Re: Vesrah gasket kits CB750 K1
« Reply #5 on: September 20, 2020, 12:40:19 PM »
Cheers for clarification Graham.

Is the Vesram gasked decent quality? Is that what you fit?


A good aftermarket gasket set and i have fitted more than a hundred in the past few year and never had a problem as, long as you up grade the o'rings  ;)

I have a Genuine Honda ( marked late K2) gasket set I am  using on my K0 Graham and intended to use the head gasket with the genuine square section seals,as  described in the Service
 Bulletin linked earlier. Is there a known problem with that?
« Last Edit: September 21, 2020, 08:53:50 AM by AshimotoK0 »

 

SimplePortal 2.3.5 © 2008-2012, SimplePortal