Topic: 1978 CB750K — Post 836 OIL PRESSURE - not good

[RAFster122s]

Paint on the triple tree and swingarm is easier to touch up as chips in powdercoated things are a challenge as it repels most kinds of paint you might try to touch it up with...
Powdercoated parts will dull over time but they clean up very easy...strong water rinse and wipe off and let dry.
Put a good coat of wax on your painted swingarm and it should be a once a year heavy cleanup and re-wax...

[SKTP]

*found it. http://forums.sohc4.net/index.php?topic=84385.0

Thank you very much!

[Freaky1]

I went with a 20% flat black on my trees on the advice of my powder coater. He said the 20% holds up so much better to UV then straight flat. I listened and all my stuff still looks great, now it was only one summer but she went through rain & snow. We would always just touch up the powder coating where it had chipped, not actually covering the powder.

I read somewhere that the little bushings on the swing arm need to be pressed in from the inside as there is a bit of a taper. I could be wrong, mine went it fairly easy and that was before I heard this.

My lower neck race I cut off with a dremmel. Rubber stinks when it burns and chisels send bullits flying, just my 2 cents.

[lucky]

So I am finally getting around to rebuilding. My bike's tranny started getting all funky right before Christmas. So, since the motor is coming out I am goign to try and rebuild as much of the bike as I can. Right now the plan is:

- Media bast and powdercoat the frame, swing arm, triple tree, battery box, random bits, etc...
- New gaskets everywhere
- fix the tranny
- clean & polish everything
- rebuild and paint the forks
- new bearings, headset, swing arm, engine
- replace melted wiring
- upgrade the points/condensors. most likely get the Cycle-x Powerup kit http://www.cyclexchange.net/index%20pics/Power-up%20kit.JPG my mufflers are rusted and look terrible
- new primary chain
- new rings
- finish double-disk conversion (the second caliper never got mounted) and new more-modern master cylinder

I would love to hear any suggestions of other stuff I should consider doing. This will be my first major project...here's a brief history of the bike in pics

Round 1
I first bought it and cleaned it. It is my first motorcycle ever...used muratic acid on the tank rust (inside), stripped the old paint and rattle canned it...rebuilt the master cylinder, fixed wiring, had the carbs cleaned, new point and condensors


Round 2
New seat (thanks http://www.classiccyclecity.com/), powder coated Lester mags, new chain, bar risers and drag bars, super crappy mirrors, new ikon rear shocks, began conversion to double disk front, rotors resurfaced and drilled (thanks Chris Schumann, speedracer741_@hotmail.com he did an awesome job) also, my friend Taters painted the tank and chain guard. Real goldleaf and pin stripes...turned out so good, thanks Taters!


Round 3 (right now)
The plan is outlined above. I plan on posting many, many pictures of the progress and how things went together here...and all the progress. As I said this is my first major rebuild. I want to make this bike look and run amazing! It was my daily driver for 2.5 years.

Why not just say you are going to restore the complete motorcycle?

That covers it all. BTW....Forget about that word AMAZING. Means nothing now.
All of the young guys say everything is amazing. Means nothing. Their guitar is amazing.... their item they are selling on Ebay is amazing. Means nothing.
Think of something that means something. "Like complete restoration back to its original state."

You worry me because you keep saying "you plan" on doing this and you "plan" on doing that. Say to your yourself "I am going to do it" ....not I am planing on doing it.

Sorry to have to say this.

We are all waiting to see if you can stick to it and complete the restoration.
Even if it takes a year or two it will be a great acheivement if done correctly.

IT looks like you know how to do it. You have a good start. But the question is WILL YOU finish this? We all want to see it finished.

[lucky]

Any tips on removing these steering race/seal rings also appreciated



Soaking in Simple Green...they are on there good!

Just pound a screwdriver or old chisel blade under it . It will come right off

[lucky]

Arrrrgggghhhhh!!!! So the cases are split the tranny is out of the bottom case and I can see those half-moon bearing retainers on the top cases tranny area. But nothing looks like the other chunk of the mystery broken bit?! What the heck is it?! I'll be taking more apart all week. There's almost no more to tear-down. I hope I can figure out what was messing up the tranny....case-splitting photos to be posted soon

Those broken pieces of metal are parts of piston rings.
When it was last taken apart the person probably broke a ring and did not have rags around the base of the connecting rod, so the pieces fell into the case. Just a guess.
That clutch looked really dirty. You will need to buy the socket to get that nut on.
It only costs about $20 something bucks on Ebay or other websites. Most all of the Honda clutches on other engines use that type of nut.

[RAFster122s]

Lucky's guide and posts on how to win friends and influence enemies...

Yep, you read it here.

[SKTP]

Hahaha...yes, I am finishing it....I just had to move garages yet again....parts will soon be off to paint and powdercoat

[jaguar]

Arrrrgggghhhhh!!!! So the cases are split the tranny is out of the bottom case and I can see those half-moon bearing retainers on the top cases tranny area. But nothing looks like the other chunk of the mystery broken bit?! What the heck is it?! I'll be taking more apart all week. There's almost no more to tear-down. I hope I can figure out what was messing up the tranny....case-splitting photos to be posted soon

Those broken pieces of metal are parts of piston rings.
When it was last taken apart the person probably broke a ring and did not have rags around the base of the connecting rod, so the pieces fell into the case. Just a guess.
That clutch looked really dirty. You will need to buy the socket to get that nut on.
It only costs about $20 something bucks on Ebay or other websites. Most all of the Honda clutches on other engines use that type of nut.

love the posts this guy finds....talk about putting in forum work...

[70CB750]

Any tips on removing these steering race/seal rings also appreciated



Soaking in Simple Green...they are on there good!

Just pound a screwdriver or old chisel blade under it . It will come right off

yeah, that's a good way to mess up your tripple tree.  You should cut the race with a small cut off wheel.  Cut across it as deep as you can on two sides and than use cold chisel to brake the ring in two.

or you can get bearing puller - some car parts store rent them too. 

Hammering screwdriver anywhere is a pretty bad juju 

[lucky]

Any tips on removing these steering race/seal rings also appreciated



Soaking in Simple Green...they are on there good!

Just pound a screwdriver or old chisel blade under it . It will come right off

yeah, that's a good way to mess up your tripple tree.  You should cut the race with a small cut off wheel.  Cut across it as deep as you can on two sides and than use cold chisel to brake the ring in two.

or you can get bearing puller - some car parts store rent them too. 

Hammering screwdriver anywhere is a pretty bad juju 

A cut off wheel will do a LOT more damage with just a little slip, than the tap of a hammer and chisel.

Matter of fact that is EXACTLY how I got mine off on my 1978 cB750.
I gave the chisel a little tap and the race came right off!! Not kidding.

To get the rear wheel bearing retainer off. I used my 4 inch grinder wheel changing tool.

[SKTP]

Back from the grave!!! I'm finishing the bike this summer
Working on the air box and stumped?!

How do these unscrew?

[SKTP]

Success! Thank you....a little WD and some vice grips...

That's the bottom of the middle tray....all plastic now soaking in soap and water for a good scrubbing...seem to recall a peanut oil and plastic thread? Have to search that one out...Slow and steady wins the race

[HonderCB]

keep us posted on what you do to clean up that air box.  mine is looking pretty sad... faded and stained.  I would prefer to not have to paint it.

[RAFster122s]

Peanut butter is the deal from what ive seen for restoring the black and removing the white haze.  Wax on wax off...so to speak.

[fastbroshi]

For restoring faded black plastic, there's always Mother's Back to Black.  Works great,  but it leaves the surface slightly greasy and it attracts dust like crazy.   There's an even better product I've used by Aaron's but the name escapes me at the moment.

[Boulevard_beck]

I used Vaseline on mine the other night and it came out looking pretty good.

[SKTP]

Should I care that the rubber "pods" that go in the air box are sort of "goopy" and one is stilly deformed from melting?  You can't really see them. There's no holes or tears...they should be fine, right?

[RAFster122s]

Beck, vaseline might make it look good but it attacks rubber. The carb to airbox boots are kind of important because they will affect the air flow into the carbs. That can affect the atomization of the fuel a carb. I would find a better used example.

A plug chop or two will tell you how the individual cylinders are running. That should tell you if you have a difference to worry about.

[SKTP]

The cleaning continues...hoping that after rent I can afford some parts and maybe paint and/or powder coating

Man that carbon is on there good...soaked in Simple Green and scrubbed with Scotch Bright...I think I'll have it all off next session

Here's a before shot:



Any ring removal tips appreciated...I have a new set that I plan on using...but they seem extremely easy to break coming off (tried one, broke one)...Is it the same putting them on? Yikes!

[thomellis]

For the rings (depending on how brittle) you can usually get the thumbs in there, spread it and pop them off, just go slow.  The new rings will most likely be a lot more pliable and easier to spread.  Seems to be the preferred method around here, if for no other reason than it's free ;P

If you want, you can also get a ring tool, they're just a couple bucks, saves the thumbs and can really make it a lot easier. 

Peanut oil (or butter like RAF said) will do wonders on old plastic parts.  There is a thread around here with some examples, really looks sharp, and it's pretty cheap.

Are you going to reuse your steering bearings?  If not you can obviously be a bit more aggressive.  A lot of guys use a bronze drift, and just tap side to side till it slides off.  I wasn't reusing mine, so I just took an old eninge bold and used that, eventually it pops right off.

Things are sure looking good!

[SKTP]

Thanks!

Yes, I did get that streering "race" thing off and am using AllBallz tapered bearings on the new set up....

[jontc]

nice work.Im just getting started on my project now.Waiting for frame from the powder guy.this is page 8 of your build,im on page 2 with mine.Looks like its going to be a nice ride when put back together

[SKTP]

Yes, I need to get off my ass !!!!!!

[SKTP]

Acquired some new bars...carbon fiber...hoping they fit