Author Topic: 1969 CL450 US Barn Find Restoration  (Read 6920 times)

Offline Jamesh_sussex

  • SOHC Jedi
  • Posts: 2640
  • Too many bloody bikes!!!
    • View Profile
Re: 1969 CL450 US Barn Find Restoration
« Reply #225 on: January 22, 2019, 10:46:28 PM »
Still £55 first reg fee. But yes, no insurance required. Has been that way for 18 months or so now. James

Offline Jamesh_sussex

  • SOHC Jedi
  • Posts: 2640
  • Too many bloody bikes!!!
    • View Profile
Re: 1969 CL450 US Barn Find Restoration
« Reply #226 on: January 23, 2019, 02:28:11 PM »
Wiring diagram attached Dave (finally) - what a mission that was..

Offline MrDavo

  • SOHC Pro
  • Posts: 825
  • He who dies with the most toys wins
    • View Profile
Re: 1969 CL450 US Barn Find Restoration
« Reply #227 on: January 23, 2019, 03:23:10 PM »
Being able to register it before I insure it makes life easier, I had to MOT and insure the 750 before I could even apply. The dating letter has been ordered.

Many thanks for the wiring diagram, it will help a lot - I have a couple in my Clymer manual but this is much closer to the wiring I have, although still as clear as mud in some places about what colour wire is what. I was having a bit of trouble last night getting my head round the tacho bulbs, for example the turn signal bulb has a feed from each indicator, orange and blue, but no obvious earth - it's in a rubber sheath and so isolated from the tacho body, which has its own earth for the instrument light.

I've printed the diagram out so I can use it in the garage.

I did get the 'elephant's ear' horn working, it is super loud, sounds like a truck horn!
1969 Honda CL450 'Scrambler'
1971 Honda CB750 K1 'General Export Type' (from South Africa)
1985 Porsche 911 3.2 Carrera Sport
2005 Harley XL1200R Sportster

Offline Bryanj

  • SOHC Jedi
  • Posts: 5339
    • View Profile
Re: 1969 CL450 US Barn Find Restoration
« Reply #228 on: January 23, 2019, 03:52:11 PM »
The indicator repeater earths through the side that isnt lit which is why if you fit led indicator bulbs and leave the idiot light connected all 4 flash!!!

Offline MrDavo

  • SOHC Pro
  • Posts: 825
  • He who dies with the most toys wins
    • View Profile
Re: 1969 CL450 US Barn Find Restoration
« Reply #229 on: January 23, 2019, 04:17:09 PM »
The indicator repeater earths through the side that isnt lit which is why if you fit led indicator bulbs and leave the idiot light connected all 4 flash!!!

I can see why that would happen, but why don't mine do that? Is it because it is earthing through the unlit side's bulbs, but the current drawn by the repeater light isn't enough to actually light them? A weird arrangement, but I'm sure you and Honda understand the logic better than I do.  :D
1969 Honda CL450 'Scrambler'
1971 Honda CB750 K1 'General Export Type' (from South Africa)
1985 Porsche 911 3.2 Carrera Sport
2005 Harley XL1200R Sportster

Offline Bryanj

  • SOHC Jedi
  • Posts: 5339
    • View Profile
Re: 1969 CL450 US Barn Find Restoration
« Reply #230 on: January 23, 2019, 09:31:06 PM »
Your logic is correct for 21w filament bulbs, no idea why things go wrong with led bulbs i just know it happens, maybe because lef draw a lot less current.

Offline MrDavo

  • SOHC Pro
  • Posts: 825
  • He who dies with the most toys wins
    • View Profile
Re: 1969 CL450 US Barn Find Restoration
« Reply #231 on: January 26, 2019, 07:16:24 PM »
I got the registration form and guide from the DVLA today, also heard from Ray Davis at the VJMC asking for a better picture of the engine number. It is a sod to take a good photo of because of the pipes, I only got the number to show up clear by rubbing a bit of copper grease into the digits.

I had her running again today, having a lot of trouble trying to get a good tickover, it only seems to respond to the offside carb screw, and sometimes ‘hangs’ at scary high revs. I’m tempted to get new throttle cables rather than persist with the old ones.

I also found out what a faff taking me tank off is, you have to drain the fuel first due to the pipe between the two halves of the tank. This is where I’d have been better off if I’d shelled out for an external bottle feed.
1969 Honda CL450 'Scrambler'
1971 Honda CB750 K1 'General Export Type' (from South Africa)
1985 Porsche 911 3.2 Carrera Sport
2005 Harley XL1200R Sportster

Offline Jamesh_sussex

  • SOHC Jedi
  • Posts: 2640
  • Too many bloody bikes!!!
    • View Profile

Offline MrDavo

  • SOHC Pro
  • Posts: 825
  • He who dies with the most toys wins
    • View Profile
Re: 1969 CL450 US Barn Find Restoration
« Reply #233 on: January 26, 2019, 08:47:32 PM »
Hell I’d forgotten all about them, when I was on the Honda Superbike team the RC45 race bike had them as standard in the fuel Ines. We called them ‘dry breaks’

I liberated a couple when I left for the Norton S Type I was building at the time, but that’s just what I want for that pesky balance pipe, i’ll get one ordered.

I’m not sure if I have a throttle cable problem or an air leak with no reliable tickover and revs that suddenly go mental for no reason. I tried tightening the band around the inlet stubs, not much else I can try. The twins forum is full of people trying to make these carbs behave.
1969 Honda CL450 'Scrambler'
1971 Honda CB750 K1 'General Export Type' (from South Africa)
1985 Porsche 911 3.2 Carrera Sport
2005 Harley XL1200R Sportster

Offline MrDavo

  • SOHC Pro
  • Posts: 825
  • He who dies with the most toys wins
    • View Profile
Re: 1969 CL450 US Barn Find Restoration
« Reply #234 on: January 27, 2019, 07:47:42 PM »
More progress today, I connected all the wires up, I had a surprise when I tried the indicators, the generic indicator relay I bought from eBay has a loud beep built in, not very 1969 at all!

Three flashed, and the repeater, the other wasn’t earthing through the headlamp ears because of the new paint. I soon fixed that, then I connected everything else up. Because of the clear colour coding and unmolested original connectors, much to my surprise I soon had fully functional lights, plus instrument lights as well as indicators and horn.

All I’ve left to do electrically is investigate the neutral light which doesn’t, and try to fit the headlamp without disconnecting anything in the bundle behind.

Tickover is still high and unreliable, but I now have both cylinders going at once, one of the new plugs was only firing intermittently so I swapped it for one of the originals!
1969 Honda CL450 'Scrambler'
1971 Honda CB750 K1 'General Export Type' (from South Africa)
1985 Porsche 911 3.2 Carrera Sport
2005 Harley XL1200R Sportster

Offline Jamesh_sussex

  • SOHC Jedi
  • Posts: 2640
  • Too many bloody bikes!!!
    • View Profile
Re: 1969 CL450 US Barn Find Restoration
« Reply #235 on: January 27, 2019, 08:43:46 PM »
Good work Dave. Sounds like you’re getting pretty close now...

Offline MrDavo

  • SOHC Pro
  • Posts: 825
  • He who dies with the most toys wins
    • View Profile
Re: 1969 CL450 US Barn Find Restoration
« Reply #236 on: February 10, 2019, 08:05:51 PM »
The registration paperwork has gone to the DVLA, so I jump on the post each day, but nothing has come so far.

A long weekend working through my ‘snagging’ list  in the garage as she wasn’t running at all well, I can happily report that I finally have a reliable tickover and she has moved under her own power for the first time in many years.

I set and adjusted the clutch, then took the carbs off to change the cables for a new set from Silvers, pattern but from a Japan, in grey to match the other cables and good quality. I had to drain the fuel, but hopefully for the last time as I have now fitted the dry breaks to the tank balance pipe as suggested by James.

I refitted the original pilot air screws but with new rubbers, and checked the carb airways, all in search of the elusive tickover.

Everything got put back together, so I was then gutted to find her still running dreadfully, starting reluctantly on one pot, then with both firing refusing to idle, with popping and banging that made me suspicious about the timing. I had hoped to do it with a strobe, but neither of mine would fit so I checked where the points opened with a multimeter. Either I’d got it wrong or it had slipped, but the points were definitely opening late.

I readjusted, put things back together and tried again- what a difference! Easy starting and an idle at last. The tacho has steamed up, not sure if there’s an o ring in the cable that’s perished, I had a similar issue with the 750 breathing up the cable.

Before I came in I wanted to see if the clutch worked, I pulled the lever in and pushed the lever down, my newly fixed neutral light went out and I didn’t fire forwards as I’d worried I might. I let the lever out and rode all of a couple of feet, but under her own steam at last.  :)
1969 Honda CL450 'Scrambler'
1971 Honda CB750 K1 'General Export Type' (from South Africa)
1985 Porsche 911 3.2 Carrera Sport
2005 Harley XL1200R Sportster

Offline Nurse Julie

  • 1973 CB750 UK K2.1977 CB550/4 Mongrel Brat. 1978 CB400/4.
  • SOHC Jedi
  • Posts: 3738
    • View Profile
Re: 1969 CL450 US Barn Find Restoration
« Reply #237 on: February 10, 2019, 09:11:27 PM »
Wayhay......and he's off. Well done Dave 👍
Im a Nurse, trust me, this won't hurt.....much !!!

LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new

Offline royhall

  • SOHC Master
  • Posts: 1928
  • Keep biking I'm not quite bankrupt yet
    • View Profile
Re: 1969 CL450 US Barn Find Restoration
« Reply #238 on: February 11, 2019, 07:11:12 AM »
Fantastic build Dave looks really spot on.

Did you manage to find the correct wiring diagram. I have a UK 1967 Black Bomber and the manual shows a diagram for that year. Unfortunately it shows only one coil and one set of points. As it's a 180 degree crank is that even possible? The wiring appears to have changed year on year. Do you by chance have a wiring diagram for that year and model.

Also, I was considering doing a build thread as I have only just got started on the Bomber but didn't really want to duplicate what Dave was doing. Does anyone have any interest in me doing a build thread?
« Last Edit: February 11, 2019, 07:52:11 AM by royhall »
Current bikes:
TriBsa CCM 350 Twin
CB350F in Candy Bacchus Olive (still smoking on pot 4 Ggrrrrrr)
CB750F2 in Candy Apple Red
CB1300SA in Black
Triumph T100C
Suzuki GS1000HC (DHL morons ruined my tank)
CB450K0 Black Bomber (current project)

Offline Johnwebley

  • SOHC Master
  • Posts: 2055
    • View Profile
Re: 1969 CL450 US Barn Find Restoration
« Reply #239 on: February 11, 2019, 12:37:01 PM »


   great news Dave.

  anyone back on the road
lifelong motorcycle rider,and fan