Author Topic: 1972 CB750 Four K2 -- Rebuilt to NEW OLD STOCK -- PIX ON PAGE 50 (Read 267793 times)

Quote from: Kickstart on March 01, 2014, 03:33:04 PM
Wow... those look really nice Powderman.

Do you also do master cylinders... is there a powder that holds up well to brakefluid?

Powder is not affected by brake fluid. Yes, I do master cylinders.

you have some masters ready to go? i need a gloss black one... please pm me directly so i can keep off this fine thread.

Powderman · « **Reply #383 on:** March 01, 2014, 06:39:41 PM »

Quote from: Medyo Bastos on March 01, 2014, 06:32:41 PM

Quote from: Powderman on March 01, 2014, 03:38:09 PM
Quote from: Kickstart on March 01, 2014, 03:33:04 PM
Wow... those look really nice Powderman.

Do you also do master cylinders... is there a powder that holds up well to brake fluid
Powder is not affected by brake fluid. Yes, I do master cylinders.

you have some masters ready to go? i need a gloss black one... please pm me directly so i can keep off this fine thread.

Sure, I keep one of every kind laying around waiting for you to order one, NOT. I do custom coating, you want yours done, send it to me and I will coat it any color you want.

edwardmorris · « **Reply #384 on:** March 03, 2014, 10:21:05 PM »

Still waiting on a few things to show up, had to deal with some snow yet again, and been racking up crazy hours at work. Just found out I'm gonna be needing a new roof this year

Freakin chimney started leaking by the boot and is dripping all the way down to my basement ugh.

Been making time in small chunks as usual, so no major update unfortunately. I'm trying to clean out the hardware (bolts/nuts) and given how compulsive I get, taking a wire wheel to each tiny piece seems extreme. Any tips on cleaning small stuff, especially the gunk from the threads that has caked on for 40+ years. There are some pieces with brake fluid caking too. All of this has survived simple green HD pro and mineral spirit baths, so I may need to go a bit tougher on these. Wirewheel does seem to clean them squeaky though $:-\$ but would be too much a pain to clean every little bit.

Suggestions to simplify this?

Powderman · « **Reply #385 on:** March 04, 2014, 08:07:00 AM »

If done correctly the wire wheel will just clean and polish the hardware and not remove any coating.

edwardmorris · « **Reply #386 on:** March 04, 2014, 08:33:30 AM »

@calj Thanks! So far no rusting back on the few pieces i've wire wheel cleaned. But I'm alarmed now, perhaps I should spray some WD-40 on them just in case. Don't have a media tumbler, and I don't want to throw it all in one place, I have it nicely bagged and tagged when I tore the bike down. Ideally something that would take the scrubbing part out of the equation would be great. I will try soaking a couple greasy threaded bolts in some CRC overnight to see if that gets it out.

@Powderman yes, the wire wheel seems to make the hardware shine a little, but I think the rust dissolver ate away what was left of the zinc. Most of the hardware, especially off the frame had a lot of white rust that seems to come off after a cleaning with mineral spirits and scrubbing with a wire brush/wheel. The bolts on the lower triple tree were the worst when it came to corrosion, with brake fluid and red rust rampant on the bolt heads and threads, probably should just replace these.

edwardmorris · « **Reply #387 on:** March 04, 2014, 07:27:02 PM »

Here is a sample before and after. Soooo not worth the time and pain. Need to find a quicker way, tumbler might just be it..

tweakin · « **Reply #388 on:** March 04, 2014, 09:01:42 PM »

I used a tumbler when I built my CL360, worked great on all fasteners. The one I used, http://www.harborfreight.com/5-lb-metal-vibrator-tumbler-67617.html#.UxauyeddWpo, was crazy loud. Couldn't even be in the shop when it was running. If I did it again I would go with the rotary tumbler like this: http://www.harborfreight.com/dual-drum-rotary-rock-tumbler-67632.html#.UxavG-ddWpo.

i have a love-hate relationship with Harbor Freight tools, I call them disposable.

That being said I am sure others have more experience with various tumblers since I usually change out all fasteners for new stainless ones on my builds.

edwardmorris · « **Reply #389 on:** March 06, 2014, 02:27:56 PM »

Quote from: tweakin on March 04, 2014, 09:01:42 PM

... I usually change out all fasteners for new stainless ones on my builds....

I thought about that, but where do you get odd length bolts, especially for the triple tree like 56mm and 74mm in chrome? Even Honda doesn't have these anymore. DSS has a few 56s left, but no one seems to have the 74s. With chrome bolts, you gotta change the set or leave it, one or two shiny and the others rusty will irk me constantly

edwardmorris · « **Reply #390 on:** March 07, 2014, 08:53:26 PM »

Sickness is keeping me from doing much. It warmed up to 40F today somehow so I stepped out into the front porch and treated some parts with Eastwood's rubberized rust encapsulator.

Bill/BentON Racing · « **Reply #391 on:** March 08, 2014, 10:08:37 AM »

I like Eastwoods stuff, Good quality, like there black chassis paint for stock frames.
I been under the weather also and waiting to gt a tooth pulled, root pain,ugh! Damn it's terrible, oh well I'll go look at new to me , CaveBears Webers!RIP. they look good!

edwardmorris · « **Reply #392 on:** March 08, 2014, 11:16:04 AM »

Quote from: Bill/BentON Racing on March 08, 2014, 10:08:37 AM

I like Eastwoods stuff, Good quality, like there black chassis paint for stock frames.
I been under the weather also and waiting to gt a tooth pulled, root pain,ugh! Damn it's terrible, oh well I'll go look at new to me , CaveBears Webers!RIP. they look good!

Ouch! Good luck to you sir, feel better.

I started a thread a while back to discuss stock frame color options and the unanimous opinion was that Rustolem Gloss Black was closest to period correct frame, and Rustoleum Semi Gloss was accurate for triple trees and gauges. Is Eastwood's color close as well?

Terry in Australia · « **Reply #393 on:** March 08, 2014, 03:03:21 PM »

Looking good Ed, as you've discovered, rust eater is usually phosphoric acid, which is great stuff for cleaning rust out of gas tanks and chrome rims, but no good for zinc plated nuts and bolts, spokes etc, as it eats zinc too.

Those bullet tumblers are great and with the right media will bring small parts up like new, but I just use my wire wheel on my bench grinder and spray 'em with some WD40 afterwards.

As far as stainless steel bolts go, they're fantastic and if you take your old bolts to a bolt shop, they'll be able to supply most of the ones you need. They may be longer than stock, but the good thing is you can shorten them to the correct length and polish the cut off ends if necessary, as unlike chrome or zinc plated bolts, they won't rust.

Otherwise, you can buy the repro "big 8" frame bolts from Yamiya. Not cheap, but nice. Cheers, Terry.

tweakin · « **Reply #394 on:** March 08, 2014, 06:33:09 PM »

just saw this Ed, sorry for the delayed response. Terry actually answered it well, most odd bolts were purchased from Yamiya all others were shortened if need be.

Quote from: edwardmorris on March 06, 2014, 02:27:56 PM

Quote from: tweakin on March 04, 2014, 09:01:42 PM
... I usually change out all fasteners for new stainless ones on my builds....

I thought about that, but where do you get odd length bolts, especially for the triple tree like 56mm and 74mm in chrome? Even Honda doesn't have these anymore. DSS has a few 56s left, but no one seems to have the 74s. With chrome bolts, you gotta change the set or leave it, one or two shiny and the others rusty will irk me constantly

edwardmorris · « **Reply #395 on:** March 15, 2014, 07:58:05 PM »

Thanks Tige and Terry, I'll see what I can do. You're right about the phosphoric acid Terry, which makes me wonder if the Phosphoric Prep and Etch sold here at home improvement stores can be used to treat gas tanks.

Weather is finally showing signs of improving but its still very moody. The cold and flu is finally gone but I'm trying to make up all the lost time at work. Should have some time tomorrow, but I can't think of what to get into. I'll figure it out, too much to do. Hopefully some updates soon.

Bill/BentON Racing · « **Reply #396 on:** March 16, 2014, 12:15:27 PM »

Yes to using it!

cheap and easy. Heres some pics of what's coming your way!

another

All forks measured fine!

Should work fine.

other gears

Ready to ship!

Let me know,guys gear sets are $90.00 for C2&C5. Yes, I honored our original price on first set.

Bill

edwardmorris · « **Reply #397 on:** March 16, 2014, 03:14:35 PM »

Sweet deal Bill, how much for the low mileage fork set?

Its been so long since I did anything substantial on the project, I was pent up, so I decided to take the most challenging task up till now, sanding down the rear wheel hub. This thing was atrocious looking with deep gouges from over tightened spokes. Pretty much took the whole day today. I've been doing the other pieces here and there for a while now as I made time. This is how they look after 500 grit. Not very happy with the clutch cover, will spend more time on that. Too many casting marks on the hub cover, being a nightmare, I might leave some in. Hub looks good at 500, next will be 1000 and 1200 then buffing time, trying to get all the sanding done first, this is painful.

Kickstart · « **Reply #398 on:** March 16, 2014, 07:26:41 PM »

Nice work!... and thanks for you post on my thread.

I'm leaving the casing marks on mine. I think if you clean it up real good (I used those little sanding dremel bits - that "fingered" sanding spiral thing, and those brilopad like puffy discs) it looks pretty nice (and original). I'm just polishing the smooth surfaces. I also have an F model where one side has a disc and the other the sprocket, so there's not much to see of the hub once everything is assembled

edwardmorris · « **Reply #399 on:** March 17, 2014, 08:30:26 PM »

Another (not so) long read from Hondaman/Mark about some of my novice questions related to polished transmission parts

http://forums.sohc4.net/index.php?topic=135295

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Author Topic: 1972 CB750 Four K2 -- Rebuilt to NEW OLD STOCK -- PIX ON PAGE 50 (Read 267793 times)