Author Topic: CB550 Seat Hardware - Bracket Dimensions?  (Read 848 times)

0 Members and 1 Guest are viewing this topic.

Offline TPIGroove

  • Full Member
  • *
  • Posts: 53
CB550 Seat Hardware - Bracket Dimensions?
« on: July 23, 2021, 12:39:46 AM »
Hello all. I'm slowly working my way through my 550, and it's just missing a lot of little bits here and there. It previously had a cruiser seat on it (which a previous owner apparently tossed without thinking) so the original seat seems to just be missing all sorts of bits. I've sourced most of the rubber, but my biggest hurdle is coughing up the $50 or so on ebay for the seat's hinge bracket. That seems a bit expensive for a hunk of metal, so I was thinking of just fabricating my own from some steel I have laying around. Would anybody mind taking pictures of theirs next to a ruler from a few angles?

Online Stev-o

  • Ain't no
  • Really Old Timer ...
  • *******
  • Posts: 34,456
  • Central Texas
Re: CB550 Seat Hardware - Bracket Dimensions?
« Reply #1 on: July 23, 2021, 06:37:26 AM »
Which model, F or K?  I may have a spare as I have a couple seats laying around...



Any other bits you may need?  I lost my storage and had to clean it out and have too many parts in my garage....
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline TPIGroove

  • Full Member
  • *
  • Posts: 53
Re: CB550 Seat Hardware - Bracket Dimensions?
« Reply #2 on: July 23, 2021, 09:29:01 AM »
Whoops, I really should have specified, sorry! It's a '74 K0. I really want to keep this seat, it's been reupholstered with white and I love the way it looks. I also need to find the screws that hold the strap to the seat.

Offline Kelly E

  • Geriatric Hooligan
  • Master
  • *****
  • Posts: 2,412
Re: CB550 Seat Hardware - Bracket Dimensions?
« Reply #3 on: July 23, 2021, 09:35:16 AM »
Here's a shot of the seat bottom and the hinge on my 74' 550K0
Never Give Up - Never Surrender

The Rust Bros. Garage Collection
1974 Honda CB 550 K0                                            1971 MGB/GT
1975 Honda CB 400F Super Sport                          1972 MGB/GT
1977 Kawasaki KZ 1000 LTD                                   1985 GMC S15
1978 Kawasaki KL 250
1980 Suzuki GS 1100E
1982 Honda CB 900F Super Sport
1983 Honda CB 1100F
1984 Honda VF 700S Sabre
1984 Honda VF 1000F Interceptor
1990 Moto Guzzi 1000 Le Mans
1994 Kawasaki Concours ZG 1000A9
2005 Harley Davidson Fat Boy

Offline bryanj

  • Really Old Timer ...
  • *******
  • Posts: 14,113
  • CB500 Number 1000036
Re: CB550 Seat Hardware - Bracket Dimensions?
« Reply #4 on: July 23, 2021, 09:47:26 AM »
That one same as 500 except K0 500
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline TPIGroove

  • Full Member
  • *
  • Posts: 53
Re: CB550 Seat Hardware - Bracket Dimensions?
« Reply #5 on: July 23, 2021, 10:09:10 AM »
Here's a shot of the seat bottom and the hinge on my 74' 550K0

I really need the dimensions of it so I can recreate it.

Offline Kevnz

  • Hot Shot
  • ***
  • Posts: 607
Re: CB550 Seat Hardware - Bracket Dimensions?
« Reply #6 on: July 23, 2021, 08:16:30 PM »
120mm between inner faces, 25mm wide. 25 from bottom of base to hole centre, 10mm offset seat base holes to hinge holes.
Good grammar: The difference between knowing your #$%* and knowing you're #$%*

Offline TPIGroove

  • Full Member
  • *
  • Posts: 53
Re: CB550 Seat Hardware - Bracket Dimensions?
« Reply #7 on: July 23, 2021, 10:10:31 PM »
120mm between inner faces, 25mm wide. 25 from bottom of base to hole centre, 10mm offset seat base holes to hinge holes.

Thank you VERY much, this will certainly help me out. My biggest concern was getting the location of the hinge holes correct, I should be able to use this.

Offline Kevnz

  • Hot Shot
  • ***
  • Posts: 607
Re: CB550 Seat Hardware - Bracket Dimensions?
« Reply #8 on: July 23, 2021, 10:47:13 PM »
Let me know if you need any more details.
Good grammar: The difference between knowing your #$%* and knowing you're #$%*