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Author Topic: Nixon, 1972 Honda CL450 Scrambler Refurb  (Read 9451 times)

Offline Flugtechnik

  • Posts: 3018
  • My bike is not transportation, it is a respite
    • Nixon and Me
Re: Nixon, A 1972 Honda CL450 Scrambler
« Reply #20 on: Aug 07, 2016, 02:47:16 »
Since the carbs changed between 71 and 72 I think a lot of people got incorrect carb rebuild kits and we are seeing the results.  Although, I can't understand why you would rebuild one carb and not the other.  I guess some people are pretty cheap.

Back to the engine dismantling....

I took the cylinders off.  You can still see most of the cross-hatching from when I had the cylinders honed a few thousand miles ago.  Nice!





However, I think I might have found my problem.  The right piston (in the left in the pic) clearly has more carbon buildup on it.  It also has a broken ring!  No bueno.  I will get the cylinders measured and inspected to see if I need to go up a size or just get new rings.




I also took the stator cover and starter off.




And I took the clutch cover off.








Offline john83

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Re: Nixon, A 1972 Honda CL450 Scrambler
« Reply #21 on: Aug 08, 2016, 23:03:25 »
Mmmm...engine rebuild time. Tasty.

I believe that a Dyna S ignition meant for a GL1000 can be modified to work for a CB450. If that's so I would highly recommend it. I've got one on my GL. I had one die last year, I contacted Dyna and told them I thought it was bad, they had me send it in and tested it. The contacted me and said that it had failed but that it was thirty years old. They sold me a replacement at cost, about half of retail. Very solid unit and a company that stands behind their product.

Offline Flugtechnik

  • Posts: 3018
  • My bike is not transportation, it is a respite
    • Nixon and Me
Re: Nixon, A 1972 Honda CL450 Scrambler
« Reply #22 on: Aug 12, 2016, 12:51:08 »
I will look into the dyna ignition.  I saw that Dime City sells it.  Can you adjust the two pickups seperately?  I was considering getting the one from Charlies Place ( http://www.charlies-place.com/shop/electronic-ignition-fits-65-74-cbcl450-and-75-76-cb500-twins/ ).  No modification needed but it is more expensive.


The mail man brought some things!




The carbs had a spa day, spent some time in the ultrasonic cleaner, a seafoam rub down to restore the finish and two rebuild kits to freshen up the brass bits.





Hopefully having the same parts in both carbs will fix some of the problems.  I have a good variety of jets now so I will be able to tune them once it is running again.  I am going to start with the stock 145s.
« Last Edit: Aug 23, 2016, 00:05:48 by Flugtechnik »

Offline bezugo

  • Posts: 50
Re: Nixon, 1972 Honda CL450 Scrambler Refurb
« Reply #23 on: Aug 15, 2016, 22:27:58 »
I will be following your rebuild closely.  Probably i'll be doing the same thing this winter.

Keep us posted so we can learn how to do it.

Offline mothgils

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Re: Nixon, 1972 Honda CL450 Scrambler Refurb
« Reply #24 on: Aug 17, 2016, 08:00:41 »
In!


Good to see Nixon is getting a refresh.  Can't wait to see it done.


What are the tires you are running?
'74 CB550 build thread - http://dotheton.com/index.php?topic=13680.msg130739#new
'76 CB550 "Scrambler" Project Warpig - http://www.dotheton.com/forum/index.php?topic=72747.0
Hoodcat Moto
Forrest Fabrication

Offline Flugtechnik

  • Posts: 3018
  • My bike is not transportation, it is a respite
    • Nixon and Me
Re: Nixon, 1972 Honda CL450 Scrambler Refurb
« Reply #25 on: Aug 17, 2016, 12:03:17 »
Shinko 705

Pretty happy with them so far.

Offline Hurco550

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Re: Nixon, 1972 Honda CL450 Scrambler Refurb
« Reply #26 on: Aug 17, 2016, 12:07:26 »
ahh so this is the bike that E was telling me about that flipped down a cliff on the way to meltdown.. good to see it coming back together again, and glad you recovered =)
Keep er' Between The Ditches!!!

1976 BMW R90/6 farkilitious: http://www.dotheton.com/forum/index.php?topic=74349.msg882477#msg882477
1975 RD350 Road Racer: http://www.dotheton.com/forum/index.php?topic=70652.msg833688#msg833688
1973 Ironhead Hardtail: http://www.dotheton.com/forum/index.php?topic=68135.msg788081#msg788081
1976 GT250 Rebuild: http://www.dotheton.com/forum/index.php?topic=64973.new#new
Full Custom Pit Bike: http://www.dotheton.com/forum/index.php?topic=66954.new#new
1971 Yamaha 90cc twin HS1: http://www.dotheton.com/forum/index.php?topic=70498.0
"Two strokes are the motorcycle equivalent to Thors chariot. Full of glory and memories of battles victorious" ~ von yinzer

Offline Flugtechnik

  • Posts: 3018
  • My bike is not transportation, it is a respite
    • Nixon and Me
Re: Nixon, 1972 Honda CL450 Scrambler Refurb
« Reply #27 on: Aug 18, 2016, 23:16:46 »
ahh so this is the bike that E was telling me about that flipped down a cliff on the way to meltdown.. good to see it coming back together again, and glad you recovered =)

This is the one!  I don't know how many lives it had before me so I don't know how close it is getting to the limit of 9.

Offline john83

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Re: Nixon, 1972 Honda CL450 Scrambler Refurb
« Reply #28 on: Aug 22, 2016, 23:26:11 »
The pickups on the Dyna can be adjusted separately. One pickup is considered fixed, you move the whole plate to adjust it, but there is a way to even move it separately if needed. For some reason the pictures you posted didn't load for me and that link doesn't work.

Offline Flugtechnik

  • Posts: 3018
  • My bike is not transportation, it is a respite
    • Nixon and Me
Re: Nixon, 1972 Honda CL450 Scrambler Refurb
« Reply #29 on: Aug 23, 2016, 00:24:11 »
To keep things moving along, I rebuilt the starter.  It didn't really need it, but I don't want to have to mess with it again.

I bought a rebuild kit that had a surprising number of new parts with it.  The only parts I didn't replace with the kit were the planetary gear bushings.  The original ones seemed to have a slightly tighter fit than the new ones and they were in near perfect condition.




Who knew these things had so many parts!




I had to repaint the casing due to some scratches so I had to bake the enamel again, 200 degs for 60 minutes.




Back together and looking fresh.