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Author Topic: Nixon, 1972 Honda CL450 Scrambler Refurb  (Read 8656 times)

Offline Flugtechnik

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    • Nixon and Me
Re: Nixon, 1972 Honda CL450 Scrambler Refurb
« Reply #50 on: Dec 21, 2016, 11:06:14 »
Continuing with the upgrades, I bought myself some early Christmas presents from Cappellini Moto (http://www.cappellinimoto.it/?language=en).  I bought a refurbished oil pump with an oversized piston to make sure the oil flows well.  I also bought an oil filter kit that adds an actual oil filter to the bike and has an outlet for an external oil line.  It mounts into the side cover where the original oil "filter" is.



Since I was planning to run an external oil line to the head, I needed a way to connect the line to the cam covers.  I saw that Franco had some covers with fittings already installed.  THEN, I saw he had covers with the fittings installed AND a needle bearing conversion installed.  I always thought the cams spinning in the solid cam cover bushings was kind of a goofy design, so I sprung for the covers with the needle bearings installed. 



To complete the needle bearing conversion, the ends of the cams have to be turned down to fit into the bearing sleeves.  For this I turned to Mr. E over at Mr. E Machines and his vintage lathe.  He made quick work of my cams and they now fit into the bearings perfectly.



To complete the oil filter install, one of the oil passages needed to be blocked off and rerouted.  Mr. E tapped some threads into the current oil passage and installed a set screw to close it off.  Then he used his overly-complicated drill press to make a new hole per Cappellini's instructions.









Finally, since I will be running an external oil line to the head, I needed to block off the stock oil passages that run up the two cylinder head bolts.  To do this, we again tapped threads into the oil passages we wanted to block and installed set screws with a generous helping of red loctite.

The two passages at the base of the cylinder get blocked in the upper crankcase.








Then the two oil passages in the head that lead from the head bolt tunnel to the cam cover well get blocked.  This ensures oil does not go down into the old oil passage and sit there and cook.





« Last Edit: Dec 21, 2016, 15:16:26 by Flugtechnik »

Offline Maritime

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Re: Nixon, 1972 Honda CL450 Scrambler Refurb
« Reply #51 on: Dec 21, 2016, 11:10:10 »
Nice work!
The GL Rebirth: http://www.dotheton.com/forum/index.php?topic=68337.0
CX500 Low budget Bobber : http://www.dotheton.com/forum/index.php?topic=43617.0
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Offline Green199

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Re: Nixon, 1972 Honda CL450 Scrambler Refurb
« Reply #52 on: Dec 21, 2016, 11:45:02 »
That's awesome. Haven't seen many 450's with a proper oil filter upgrade.
1973 CB250 'Doing it right this time round' - http://www.dotheton.com/forum/index.php?topic=36795.0

Offline JustinLonghorn

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Re: Nixon, 1972 Honda CL450 Scrambler Refurb
« Reply #53 on: Dec 21, 2016, 12:37:42 »
Exceptional work, sir.
I'm going to eat your brains and gain your knowledge.

Into The Sunset, CB750 build

TT500 the Animal

Online clem

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Re: Nixon, 1972 Honda CL450 Scrambler Refurb
« Reply #54 on: Dec 21, 2016, 21:42:21 »
You are really taking care of this engine Flug.  She'll be sweet and reliable when back together.

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"After every war there are soldiers who refuse to surrender. To this day there are still thousands who cling to their 30+ year old motorcycles, thinking that the war is still on, refusing to concede that the four-strokes have won"

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Offline Jewbacca

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Re: Nixon, 1972 Honda CL450 Scrambler Refurb
« Reply #55 on: Dec 23, 2016, 02:37:42 »
Loving it Flug! Glad to see you haven't given up on the old gal.
1979 Honda CB750K- Soon to be CB750K-SC Night-Ninja (SOLD)
http://www.dotheton.com/forum/index.php?topic=18771.0
1974 TX500A "Yamahonda" http://www.dotheton.com/forum/index.php?topic=66736.0"
1983 Honda CB650SC
http://www.dotheton.com/forum/index.php?topic=70532.new#new
Gives me a major cramp in my wedding tackle..." Fellow PNW Rocker Dave Simmons

Offline xulf13

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Re: Nixon, 1972 Honda CL450 Scrambler Refurb
« Reply #56 on: Dec 23, 2016, 12:40:35 »
Mike, you're doing this right man. Lots of detail going in in this rebuild/upgrade. Glad you got help from E. To help you with this. When do you start to put things back together?


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Offline Flugtechnik

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  • My bike is not transportation, it is a respite
    • Nixon and Me
Re: Nixon, 1972 Honda CL450 Scrambler Refurb
« Reply #57 on: Dec 23, 2016, 20:42:27 »
The only thing left to do before reassembly is to get the outside of the engine parts (cases, head, etc.) media blasted to remove the old paint so I have a nice clean surface for the new paint to stick.  The last time I painted the engine I just cleaned it as best I could.  I ended up with some paint flaking and peeling off.  I want to get the pieces blasted before I reassemble it because I don't want any of the media getting into the assembled engine.  I plan to get some quotes on the blasting after the holidays.

Online trek97

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Re: Nixon, 1972 Honda CL450 Scrambler Refurb
« Reply #58 on: Dec 23, 2016, 21:07:25 »
Considering all the work you've done.  That makes me nervous.  It would be a lot more work but stripping it would be a safer bet.

And this Jasco is the Bees Knees.
 
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« Last Edit: Dec 23, 2016, 21:10:31 by trek97 »

Offline Rider52

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Re: Nixon, 1972 Honda CL450 Scrambler Refurb
« Reply #59 on: Dec 23, 2016, 23:36:17 »
Glad to see you are running oil lines to the head. That is a 450 DOHC weak point. I built 450s for several years and nearly every engine I received was suffering from oil starvation.
Projects
74 Yamaha TX650
Sweep the Floor Project
3 Assorted Honda CL 72 scramblers in a million pieces
3 Harleys in constant state of sorrow and a Buell
1978 Yamaha Chappy 80 burning up the highway
Cut my motor in half Sportster to Shortster