Author Topic: CB 500 Four (1972?) Full Restoration (Read 138492 times)

MickB · « **Reply #525 on:** February 01, 2015, 09:50:25 am »

Thanks DH for comment and advise regarding the rust.

However regarding this tube.

SohRon quotes:-

The two final parts that finish up the installation are the drain hoses for the filter/element case and the plenum. They come in two sizes, and while they may look similar, they're actually quite different

The longer hose is the plenum drain hose. It is has an internal foam filter

Foam filter. Remove this when using hose for drain on the filter/element case

Its primary purpose is to drain any gas that might somehow escape the carbs and splash into the plenum. The foam acts as a kind of barrier that lets gas out but doesn't let in a lot of air or debris, so that the correct pressures are maintained inside the plenum during engine operation. It connects to the plenum via this outlet formed into the plenum body where it's secured by an omega clip

[/

This photo is of the Plennum (left) and Air Filter Housing (right).
... the plenum hose can still be had and, with a couple of mods, will work fine. Just cut it to length and remove the internal foam filter mentioned previously.....

I'm confused, do I leave the sponge in or remove it?! Does it drain or keep stuff out of the air filter housing

It finally dawns on me, the 500 doesn't have a Plennum drain, so there's no tube needed, therefore the sponge comes out as it's going into the filter housing; per SohRon's comment ... Foam filter. Remove this when using hose for drain on the filter/element case.

Problem solved unless anyone else disputes my finding.

DH · « **Reply #526 on:** February 01, 2015, 07:49:45 pm »

Quote from: MickB on February 01, 2015, 09:50:25 am

Thanks DH for comment and advise regarding the rust.

However regarding this tube.

SohRon quotes:-

The two final parts that finish up the installation are the drain hoses for the filter/element case and the plenum. They come in two sizes, and while they may look similar, they're actually quite different

The longer hose is the plenum drain hose. It is has an internal foam filter

Foam filter. Remove this when using hose for drain on the filter/element case

Its primary purpose is to drain any gas that might somehow escape the carbs and splash into the plenum. The foam acts as a kind of barrier that lets gas out but doesn't let in a lot of air or debris, so that the correct pressures are maintained inside the plenum during engine operation. It connects to the plenum via this outlet formed into the plenum body where it's secured by an omega clip

[/

This photo is of the Plennum (left) and Air Filter Housing (right).
... the plenum hose can still be had and, with a couple of mods, will work fine. Just cut it to length and remove the internal foam filter mentioned previously.....

I'm confused, do I leave the sponge in or remove it?! Does it drain or keep stuff out of the air filter housing

It finally dawns on me, the 500 doesn't have a Plennum drain, so there's no tube needed, therefore the sponge comes out as it's going into the filter housing; per SohRon's comment ... Foam filter. Remove this when using hose for drain on the filter/element case.

Problem solved unless anyone else disputes my finding.

Sounds plausible to me

Either way I'd think you can't go horribly wrong. I'd go with Ron's method as well.

MickB · « **Reply #527 on:** February 01, 2015, 10:04:35 pm »

Can someone advise where I can get replica electrical connector blocks to suit the electric plate.
Thanks in advance.

bryanj · « **Reply #528 on:** February 01, 2015, 10:29:25 pm »

Those are not easy as the round pin ones were only fitted for about the first 6 months, if its the sub loom on the electrical plate you could try Western Hills Honda for the early part, they also sometimes come up on ebay

MickB · « **Reply #529 on:** February 02, 2015, 12:55:47 am »

Well now I see the drain tube is on the Plennum after thinking it was on the body, all I have at the base of the air filter is a small hole.

calj737 · « **Reply #530 on:** February 02, 2015, 04:51:40 am »

Mick - here's an online place you can order exactly what you need.

http://www.easternbeaver.com/Main/Elec__Products/Connectors/090_Connectors/090_connectors.html Check out the rest of his site for "hard to find" authentic connectors.

Else, you could remove the pins, swap them to flat style spades, and install new connectors.

MickB · « **Reply #531 on:** February 03, 2015, 02:14:17 am »

Thanks Cal

MickB · « **Reply #532 on:** February 03, 2015, 02:17:18 am »

Air filter on thanks to SohRon for his little how to install the air filter box in one easy lesson.
Waiting on part #10 listed on the air filter schematic, I got the last one in Australia.

MickB · « **Reply #533 on:** February 06, 2015, 11:46:45 pm »

Moving along - installed new rear brake shoes, new coils and drilled handlebars for wiring.

Handlebars with clutch and handbrake.

Installed throttle cables

Is the spring installed correctly as the throttle doesn't snap shut.

calj737 · « **Reply #534 on:** February 07, 2015, 04:57:51 am »

Your right side throttle/grip is too close to the housing. That's what's causing the throttle to bind; there's too much friction. Separate the throttle by a about 2mm and then retest. You require the free space for cables to create the action of returning the throttle tube.

Really looks good now!

Are you staying with a raw aluminum finish on the handlebar clamp?

MickB · « **Reply #535 on:** February 07, 2015, 12:24:28 pm »

Thanks Cal, but I realized I've forgotten to put the spring with the plastic cover on that goes in between carby 2 & 3.
No raw aluminum, it's there to clamp the handlebar in place, I have 2 of the clamps, the other one is being painted.

calj737 · « **Reply #536 on:** February 07, 2015, 12:48:20 pm »

Quote from: MickB on February 07, 2015, 12:24:28 pm

Thanks Cal, but I realized I've forgotten to put the spring with the plastic cover on that goes in between carby 2 & 3.

...or that... Guess I gave you too much credit

MickB · « **Reply #537 on:** February 07, 2015, 12:49:19 pm »

It's easy to forget when there's a lot going on in my head.

I hope I can put it in place without having to take the air filter off.

MickB · « **Reply #538 on:** February 07, 2015, 11:51:14 pm »

After forgetting to install Spring A (on the schematic) and not wanting to tear down the air filter I used an thin telescopic magnet, a long thin screwdriver and pointy nose plyers to get this:-

Voila!

Cal carbs now snap shut.

Valhad · « **Reply #539 on:** February 07, 2015, 11:53:56 pm »

Neat bit of work there, Mick. I had had to reseat that spring in place once... Not a fun job.
Also, your whole bike is really looking fantastic. Hard to believe it's the same thing that came out of those crates.

MickB · « **Reply #540 on:** February 08, 2015, 12:33:31 am »

Thanks Valhad, I still think it's a bit rough, all done by hand not professionally done.

Restoration Fan · « **Reply #541 on:** February 08, 2015, 04:59:33 am »

Quote from: MickB on February 08, 2015, 12:33:31 am

Thanks Valhad, I still think it's a bit rough, all done by hand not professionally done.

That's what makes it beautiful to most of us on here. Anyone with the money can take one of these bikes to a place and pay them to restore it. But all of us can attest that when you take the time, money, and energy to do it yourself, a bond is formed between you and the machine that is unlike any other.

Really enjoying what you're doing.

MickB · « **Reply #542 on:** February 08, 2015, 09:29:51 am »

Thanks Resto Fan.

DH · « **Reply #543 on:** February 08, 2015, 08:31:59 pm »

http://i728.photobucket.com/albums/ww282/keen2oqe/Main%20Harness/dia1.jpg

Mick, Might want to check your throttle cable routing. check out the link above AND on sohron's build, page 11. It shows throttle cable routing, and if you scroll down page 11 He posted pics with details. i noticed in your pic that your cables don't cross over thru the frame, behind where the coils mount...Or is the 500 different? I might be way off, and only mention it cause you were having throttle issues before. That spring probably had a big effect on things,yes?

MickB · « **Reply #544 on:** February 08, 2015, 11:18:40 pm »

Thanks DH, I checked it out and will fix.

MickB · « **Reply #545 on:** February 09, 2015, 09:48:23 pm »

QUESTION FOR MEMBERS

Im wanting to use NGK spark plugs, what code should I use? I look on 4 into 1's web site and they give a range, the schematic & Clymer says D7ES.

Any suggestions would be most welcome.

rtbmrgl · « **Reply #546 on:** February 10, 2015, 09:48:07 pm »

Quote from: MickB on February 09, 2015, 09:48:23 pm

QUESTION FOR MEMBERS

Im wanting to use NGK spark plugs, what code should I use? I look on 4 into 1's web site and they give a range, the schematic & Clymer says D7ES.

Any suggestions would be most welcome.

I have D7EA in my CB500, I believe the D7ES is superseded by the D7EA.

MickB · « **Reply #547 on:** February 10, 2015, 10:18:08 pm »

Thanks RTB.

bryanj · « **Reply #548 on:** February 10, 2015, 10:19:35 pm »

If you still need the wiring sub loom check out ebay number 111595897998

MickB · « **Reply #549 on:** February 10, 2015, 10:43:02 pm »

Thanks BJ, it's a bit exy, I put in an offer but I'm not hopeful, I'll try making a loom, it'll only be about $30.

DH I fixed the throttle cables.

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Author Topic: CB 500 Four (1972?) Full Restoration (Read 138492 times)

DH

DH