testy

Author Topic: 1977 CB750 and solid state rec/reg  (Read 270 times)

0 Members and 1 Guest are viewing this topic.

Offline beemerbum

  • Hot Shot
  • ***
  • Posts: 542
1977 CB750 and solid state rec/reg
« on: January 07, 2019, 04:41:31 pm »
A long shot here.. Does anyone have a photo of a Rick's or other solid state rectifier/regulator mounted on a 1977 or 1978 CB 750 battery box? Perhaps some where else on the frame?

Offline calj737

  • Really Old Timer ...
  • *******
  • Posts: 19,353
  • I refuse...
Re: 1977 CB750 and solid state rec/reg
« Reply #1 on: January 07, 2019, 05:08:50 pm »
I have mounted them on the reverse side of the electrical panel on a few 5xxs. That allows ample free air for cooling, and the plugs from Ricks are still long enough to reach the stock outlets.

Basically, I drilled from the front side, slid some flat head screws through, mounted the Ricks atop those, and nutted it down. Easiest with panel removed from the bike, obviously.
'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

*** Currently experiencing life at 60 WTFs per hour ***
I always thought getting old would take longer

Offline beemerbum

  • Hot Shot
  • ***
  • Posts: 542
Re: 1977 CB750 and solid state rec/reg
« Reply #2 on: January 07, 2019, 05:41:05 pm »
I'm sorry, I don't understand. By "electrical panel" do you mean the battery box?

Offline calj737

  • Really Old Timer ...
  • *******
  • Posts: 19,353
  • I refuse...
Re: 1977 CB750 and solid state rec/reg
« Reply #3 on: January 07, 2019, 06:38:07 pm »
Underneath the left side body panel, the panel that holds the electrics. Worst case, you can also affix it to the battery box, either front or side (I’ve done both once or twice when the body panel was omitted from a build).
'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

*** Currently experiencing life at 60 WTFs per hour ***
I always thought getting old would take longer

Offline beemerbum

  • Hot Shot
  • ***
  • Posts: 542
Re: 1977 CB750 and solid state rec/reg
« Reply #4 on: January 07, 2019, 06:44:12 pm »
Thanks. By chance any photos?

Offline calj737

  • Really Old Timer ...
  • *******
  • Posts: 19,353
  • I refuse...
Re: 1977 CB750 and solid state rec/reg
« Reply #5 on: January 08, 2019, 03:16:32 am »
Unfortunately not. I zipped everything up off my hard drive over the holidays to make room for some more important stuff. You can look through Riverfever’s build several pages back during his MotoGadget install. There might be one there. Brian Wynn’s 750, if you can find that build had the battery box front location.
'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

*** Currently experiencing life at 60 WTFs per hour ***
I always thought getting old would take longer

Offline RustyF

  • Full Member
  • *
  • Posts: 12
Re: 1977 CB750 and solid state rec/reg
« Reply #6 on: January 08, 2019, 05:30:17 am »
I have a Rick's rectifier/regulator on my 550.  I made a small plate and mounted it where the old unit was.  Sticks out @1/2 inch more than OE but the side cover fits with no issues.  Best of all my charging issues were solved.  Sorry no pics
1978 CB 550 K

Offline beemerbum

  • Hot Shot
  • ***
  • Posts: 542
Re: 1977 CB750 and solid state rec/reg
« Reply #7 on: January 08, 2019, 07:48:21 am »
I have a Rick's rectifier/regulator on my 550.  I made a small plate and mounted it where the old unit was.  Sticks out @1/2 inch more than OE but the side cover fits with no issues.  Best of all my charging issues were solved.  Sorry no pics
That's exactly what I had in mind (mount in space left by old unit). Thank you all for the input

Offline johans

  • Enthusiast
  • **
  • Posts: 116
    • corporate leather
Re: 1977 CB750 and solid state rec/reg
« Reply #8 on: January 08, 2019, 08:28:28 am »
This is the 2nd bike that i have mounted Ricks RR in that location . The current bike has a small computer cooling fan mounted on brass posts on top of the unit . I also drilled out the side cover to aid cooling on both bikes .  i will post more pics later.
« Last Edit: January 08, 2019, 08:36:18 am by johans »
1978 CB750K
1976 CB750F SS
1978 CB750F
1979 Honda 400T
2003 Ducati Monster 800 SIE
1988 Suzuki GSXF
Kawasaki 200 KDX
Yamaha YZ 250F
1986 Kawasaki KZ 900

Kawasaki Lakota 300 ATV

Offline beemerbum

  • Hot Shot
  • ***
  • Posts: 542
Re: 1977 CB750 and solid state rec/reg
« Reply #9 on: January 08, 2019, 08:59:43 am »
This is the 2nd bike that i have mounted Ricks RR in that location . The current bike has a small computer cooling fan mounted on brass posts on top of the unit . I also drilled out the side cover to aid cooling on both bikes .  i will post more pics later.
I am thinking of mounting the unit as shown. Does the unit create that much heat that I should be concerned about cooling? I would prefer not to drill the side cover

Offline bryanj

  • Really Old Timer ...
  • *******
  • Posts: 8,304
  • CB500 Number 1000036
Re: 1977 CB750 and solid state rec/reg
« Reply #10 on: January 08, 2019, 09:27:36 am »
Yes it needs to stay cool but so did the original. It is worse on the "dump" style reg like on the GL.
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 BRG-BIRD

  • Full Member
  • *
  • Posts: 86
Re: 1977 CB750 and solid state rec/reg
« Reply #11 on: January 08, 2019, 06:10:36 pm »
A popular mod on the VFR Forum of which I was a member was to carefully glue a PC fan to the regulator/rectifier and wire it to a constant powered source to pull air through the fins. It of course is another power draw on your system so it may not be the best thing for a SOHC4.
“You are either on something or onto something.” The Comman Man

Offline gmog44

  • Full Member
  • *
  • Posts: 11
Re: 1977 CB750 and solid state rec/reg
« Reply #12 on: January 08, 2019, 07:11:36 pm »
Johans, that's a clean setup. Is the big red knob an emergency stop switch?
'78 CB550
'72 CB450

Offline johans

  • Enthusiast
  • **
  • Posts: 116
    • corporate leather
Re: 1977 CB750 and solid state rec/reg
« Reply #13 on: January 09, 2019, 08:15:16 am »
gmog-  Thanks , i have the Antigravity battery and the red switch is a Longacre Racing battery cut off . Those batteries have a problem if they fall below a certain voltage so i put that switch in to prevent any parasitic drain. ( Highly recommended with that battery )  . I also relocated the fuse block and added another one for aux circuits . I will post more pics today.
1978 CB750K
1976 CB750F SS
1978 CB750F
1979 Honda 400T
2003 Ducati Monster 800 SIE
1988 Suzuki GSXF
Kawasaki 200 KDX
Yamaha YZ 250F
1986 Kawasaki KZ 900

Kawasaki Lakota 300 ATV

 

;