Nixon, 1972 Honda CL450 Scrambler Refurb

So it's not water cooled then? ;)

Good work on the engine, brave to split the case and disassemble it entirely, although it sounds like you've been there before.
 
Lord God! I would be shitting bricks! At least you had the foresight to put things in bags.
 
Sorry about the flood, glad you are still moving forward. Many an engine gets to here then never makes it back.
 
The cylinder head came back from Chris at Schumann Motor Works today.

Valve seats recut and combustion chambers cleaned.

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Intake and exhaust ports cleaned.

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New valve guides installed. Modern positive seal valve seals installed. New custom made valves installed to adjust valve length and keeper position to account for deeper valve seat.

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Cylinders are back from Andrews Motorsports in Concord NC with a fresh bore and new Wiseco forged pistons. They set the ring gaps for me too. Sooooo clean!

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Oh yeah! It's gonna be a good thing. You're gonna love it.


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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.

p_4_000.jpg


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.

p_21%20b%20_000.jpg


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.

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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.

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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.

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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.

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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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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.
 
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.

https://www.walmart.com/ip/21285795?wmlspartner=wmtlabs&adid=22222222222016785773&wmlspartner=wmtlabs&wl0=e&wl1=o&wl2=c&wl3=10356902973&wl4=kwd-1103071467373&wl12=21285795_10000000228&wl14=jasco%20sprayable%20paint%20remover&veh=sem
 
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.
 
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