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Ok well as you guys all know, my shop has be come clustered with another project. Ever since I can remember I wanted a 450 or a 500T since seeing one in a smallish used only motorcycle shop when I was around 16-17. I was there mainly because that was the only place that my best friend could find parts for his then new to him 72 500f. We stood there and drooled and marveled at the ability to have damn near the same sized engine as his just 2 less cylinders. I can still remember the guy behind the counter trying to sell it for a couple grand, well over what either of us could afford at the time. Almost makes me wonder were the that bike is now. It would have been around 15-20 years old even then and a complete survivor. Should have borrowed the money and bought it but hindsight is always 20/20.

ANY HOW, flash back to NOW or last weekend when I managed to run down mess of parts as well as a more or less complete 1972 CB450k5. Cost, 400 bucks. Price, well after wanting one for almost 15 years now? I dare say priceless but I think I'm pretty damn stoked regardless. Condition? Well, let's just say she got parked outside and left for a while. There is LOADS of surface rust and plenty of corrosion. The engine stuck and I have had it sitting for a few days SOAKING with my own concoction, (leftover ATF and Coleman fuel and PB blaster) and not much has happened. I had a feeling it wasn't going to loosen up so I guess the next stop is to take things down to the bare frame and go from there. Then some disassembly and some BEATING will prolly relieve that tension. Its going to be a fairly long road and I'm glad I have another bike to ride so I can make this as pretty and as stock as I can.

The story starts now, the pictures and the pages follow, thanks for watching...here's some refreshers







I spent most of today working on it and I will get those pictures uploaded and posted here in a few.
 

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Good for you, looks like you found a good one, and with all the parts to boot. I feel the same about the 450, I was going to get a 550 but past up two and when a 450 came up locally I bought my second 450. The wife say,s I can,t go on craigslist anymore. What's the plan for your bike?
 

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Ok as I promised a little go through of what has gone down over the last week and today. I got the bikes home and sorted most of the stuff out and I figured I would at least put the frame back to at least rolling status so I can move it around. It's also more fun to sit on that way. :D



I started into the 72 taking the tank off and the seat. I ordered in keys for both bikes and got them all in last Monday and all the locks still work. I took a few pictures of someone's handy work on the coils and the throttle cable. Wonder what's under the electrical tape?




I also notice that the gauges appear to have swapped positions, I guess I have something for 21k mile bikes since the 360 had that much on it when I got it. Nothing like rust every where.



The entire top side of the engine looks like it is covered in a coat of MUD, most likely from the mud wasps we have around here, I'm glad the previous guy cleaned most of it off, I'm still finding nests though. The sprocket cover was FULL of dirt and straw and other things like a mouse had made a house out of it.




Of course I had my help..watching for said mouse.. :cool:



I'll let that soak in and do the rest in the morning. I will be showing WHY you don't leave an engine OPEN to the elements in the next installment. ;)
 

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dgallagher said:
Good for you, looks like you found a good one, and with all the parts to boot. I feel the same about the 450, I was going to get a 550 but past up two and when a 450 came up locally I bought my second 450. The wife say,s I can,t go on craigslist anymore. What's the plan for your bike?
The first one is going to be as close to restored factory as I can manage within my limits.

The second, well if I can find an engine, I donno yet. :lol:

74shovel said:
Pretty nice haul for $400!
Yeah, that's why I jumped on it. I've let 3 others go by when I should have bit on them. So far this one looks to be the worst. :lol:
 

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Thanks guys, I'm already having more fun than expected. I manged to get the engine out and more or less down to the block. It required some thought and some FIRE and ICE and some pounding but I got it, but that is for later. ;) Rich, I like keeping my expectations LOW, makes for a better turn around in the end, plus any small piece that gets cleaned up and looking good is just one more battle won, and more stuff for idle hands to work on. ;)

AS stated the motor was stuck and from some peeking through the spark plug holes I could see piles of rust sitting in the right hand side cylinder. I've been soaking it in all sorts of chemicals for at least a week but for some damn reason nothing seemed to be moving. Well when I got the engine out, I had to roll it on its back to put the little crappy stand I made on it and when I got it back rolled onto the stand I noticed that in the mess that poured out of the intake port was a good 3-4 tablespoons of WATER still in it. DAMNIT!!! All that time I had been spraying and flushing with stuff that FLOATS ON WATER!!! No wonder I wasn't seeing anything moving inside as I checked things. I guess that's what I get for not paying attention. :roll: Anyhow, Onwards....

Motor out and on the floor, more crap... I can't believe how massive this thing looks.




Starter Bolt twisted?? :roll: I'll get a better picture later but trust me the caps don't line up.


Now I got this cool little stand because it was $25 bucks Harbor Frieght, and I fully intend to use it as a grinding/polishing station ONCE it serves its secondary duty...



Yup you guessed it... new engine stand. I'm going to temporarily attach the engine as such while dismantling it, once it gets ready to build back up I will make a nice steel plate that will bolt to the top of the stand. Over all it works nicely, everything is pretty much right at table height or higher so it's easy working, even has a tray underneath to toss things while you are taking things apart.




If you look under the stand you can see the offending puddle of water. :evil:

I think I will stop there again, I want to keep most of these posts shorter this time around. Next is dismantling the top part of the engine, which I want in its own post. Had a mess to clean up on the floor anyway. :lol:
 

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Yep its a bg lump, weight,,,,,, about 1 hernia I would say, after lifting it myself, that was before I had the new metal shoulder though;)

I found that using a broken wood hockey stick handle, it was much easier to cary between 2, also this helped with putting the engine back in the frame too
 

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Nige I still don;t know how I got it up on the stand but I do know I will not be doing it again without help. I will keep the stick in mind, I have a half notion to rig a hoist next time. :lol:

Mike, they just put up a HF in the town I work in, so now I HAVE to go in there ALL the time and BUY things that I get to work with for WORK. :D I spend way too much time in there now. :lol:

Anyhow I've got some more to put up, so on with the show!!

I'm pretty sure there are plenty of builds that document the whole engine tear down thing so I will just touch here and there on some of the more interesting things. Once I got all the covers off and the tensioner out I noticed that I had just enough slack to turn things slightly. SO, I got to looking to see if I had enough room to make the chain slide so I could bust out the master link. I popped cam bearings off all 4 sides, and pulled the follower pins and let the followers drop into the head. After that there was plenty of room to wiggle the cams OUT and spin the chain around until I could get to the link, which this chain had 2 of them in it. ONE had been installed so poorly I'm guessing it was luck the bike got parked because I just used flat screw driver to sorta pry the side off the link, probably could have just pulled it off with a needle nose pliers. I could have just seen this bike running and blowing that link and mashing up a bunch of stuff. :shock:

Side covers off...


Look at all the GLUE, there's blue RTV EVERYWHERE seems like...


Bearings out..... This was easy, last guy used a pry device to pop the things off from the outside and messed up the gasket surfaces. I just used a soft drift stick and a hammer and tapped on the cam lobes gently and they popped right out. ;)




Pins out, followers down....



Intake Cam out...



Same for the Exhaust side....




Link... :shock: Didn't even look like it was riveted at all,


Here's the other...


SO there's the chain out with no extra cutting or swearing. I was HOPING for a single master link but I guess I just get to go looking for a NEW cam chain and masterlink now. :cry:

Here's a few more random shots, cams are in decent shape, 2 of the 4 followers are not ground up but not serviceable. I will be either replacing them or getting them resurfaced.




SO with that, I busted loose the 8 nuts on top and for some really weird reason....the head just sorta popped right off, no sticking, no messed up gasket just in my hands with no beating or swearing. Yeah you read that right NO HELL, What gives? :?
 

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watching this one long way to go but far better than watching the television.Cam chain damper rings look shot.Even NOS ones are usually brittle.Personally all my bombers have been rebuilt without them.In my view they cause more trouble than they are worth.Regards Chris.
 

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Thanks Chris that was one of the questions I was going to ask. The damper rings are still in it but you can tell they have had all of the miles the odometer says it has put on them. They will be coming out but is it worth it to replace them just for the noise reduction? Was looking at possibly running down some newer square rubber o-rings but if don't need to worry about them I won't.

Nige, its a funny thing. Signs all over show that this thing was recently taken down and worked on be it good or bad. Has me scratching my head as to why it's locked up, awful lot of work just to leave it sit. There's going to be plenty of work either way, the intake side cover has 3 bolt holes that have been re-tapped for 1/4" bolt thread instead of the 6mm. :roll: One even has a stud glued into place but it still seems to move just a bit, enough to require all the silicone I suppose. :lol:
 

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frogman79 said:
Thanks Chris that was one of the questions I was going to ask. The damper rings are still in it but you can tell they have had all of the miles the odometer says it has put on them. They will be coming out but is it worth it to replace them just for the noise reduction? Was looking at possibly running down some newer square rubber o-rings but if don't need to worry about them I won't.

Nige, its a funny thing. Signs all over show that this thing was recently taken down and worked on be it good or bad. Has me scratching my head as to why it's locked up, awful lot of work just to leave it sit. There's going to be plenty of work either way, the intake side cover has 3 bolt holes that have been re-tapped for 1/4" bolt thread instead of the 6mm. :roll: One even has a stud glued into place but it still seems to move just a bit, enough to require all the silicone I suppose. :lol:
Some people are so lazy did they just force a 1/4 tap down or helicoil? as if its the former you might be able to make it back to 6mm with a helicoil
 

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I haven't run a tap through it yet but it looks they just forced a tap down them, I am planning on hellicoiling ALL of the holes for the cam covers, as much as I like fiddling with things I can see myself wearing them out. :lol:

dagersh said:
Nice work Franz!
Thanks! Can't wait to get things going in the other direction!

Next question, gasket kits, I see there are a few Vesrah Gasket kits for sale on de flea-bay, thoughts? I used some cheapo knock offs for the 360 and so far they are all holding. Rather not go that route this time though.

http://www.ebay.com/itm/380405828255?ss ... 1423.l2649
 

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If the bolt holes are drilled too wide for the 6mm heli-coils you can always have a machine shop weld them up than drill and re-tap them. Depending on how many need to be fixed it could get a little expensive so you will want to make sure the head doesn't need a lot of other work as well (valve guides or seats). I've seen used heads on e-bay for as little as $30 but usually they are around $100 plus shipping. If you go the e-bay route I recommend contacting the seller first and ask questions about the overall condition of the head as well as the mileage of the bike it came off. If the seller won't give you the info find one who well.
 
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