Author Topic: Oil line fitting available cb750 (Read 3165 times)

atm cycles · « **on:** September 18, 2014, 01:54:47 PM »

Is there a source for new engine end oil line fittings ?

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70CB750 · « **Reply #1 on:** September 18, 2014, 02:05:33 PM »

CycleX makes them I think.

http://www.cyclexchange.net/Oil%20System%20Comp%20Page.htm

More like adapters than replacements though.

bjbuchanan · « **Reply #2 on:** September 18, 2014, 03:57:08 PM »

They have 'replacements' that aren't as internally large, gimmicky IMO. If your hoses leak just get a set from one of us members, they rarely leak. I use black spray paint to freshen the fabric cover so they don't look dingy and gray anymore. Others use fabric dye but that is overkill IMO and doesn't work all that great anyway

atm cycles · « **Reply #3 on:** September 18, 2014, 04:06:47 PM »

Was looking to make my own out of copper or something to go on the sacrilegious Rat Racer I'm workin on.

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bjbuchanan · « **Reply #4 on:** September 18, 2014, 05:29:23 PM »

Probably not a great idea because it will most likely crack in a short amount of time from vibration. Gonna have to be function before form in this case

goldarrow · « **Reply #5 on:** September 18, 2014, 05:43:45 PM »

If you need oil lines, I have a spare set of stock ones

atm cycles · « **Reply #6 on:** September 18, 2014, 05:50:43 PM »

Thanks!!! I have plenty. Just doin something different with this one. I see stainless lines and wonder how they're made if someone isn't making new factory type fittings.

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70CB750 · « **Reply #7 on:** September 18, 2014, 06:08:08 PM »

I make my own from SS hose, reusing original fittings.

The threads at the tank are M22 and M24? Not that easy and common to find tooling for that.

atm cycles · « **Reply #8 on:** September 18, 2014, 06:12:45 PM »

Really!! Do you have thread in tip n tricks or anything like that?

How to take apart without damage and reusing. I'd like to see that!!!

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754 · « **Reply #9 on:** September 18, 2014, 08:31:18 PM »

When assembling the Amen and other chopper frames, we cut off the fabricpart, then welded on an AN fitting.... A -6 or -8.=

bjbuchanan · « **Reply #10 on:** September 18, 2014, 09:34:38 PM »

The stainless is a sleeve, stainless braided, not solid like copper lines...

spiffy587 · « **Reply #11 on:** September 19, 2014, 12:19:57 AM »

Grind off the crimped portion and it has a barbed fitting then use rubber hose.

70CB750 · « **Reply #12 on:** September 19, 2014, 04:18:49 AM »

Quote from: atm cycles on September 18, 2014, 06:12:45 PM

Really!! Do you have thread in tip n tricks or anything like that? How to take apart without damage and reusing. I'd like to see that!!!

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I use hacksaw to cut through the crimped ferrule. Hoses from hydraulic shop - the pressure is very small, but the hose needs to be able to handle hot oil - and ferrules from McMaster Carr:

http://www.mcmaster.com/#hose-ferrules/=tsf4j9

The crimp easiest is to find a shop that will crimp it for you. Only one of the hoses needs to be indexed - i.e. ends have to be in certain position against each other.

calj737 · « **Reply #13 on:** September 19, 2014, 05:04:55 AM »

Quote from: bjbuchanan on September 18, 2014, 05:29:23 PM

Probably not a great idea because it will most likely crack in a short amount of time from vibration. Gonna have to be function before form in this case

I wouldn't think the oil lines form copper would encounter any more vibration than household water lines, which are very often made form copper. Really only requires you use a proper schedule pipe. Copper is also quite happy to have hot liquid through it. Just need to build some bends into the pipe to deal with the limited movement of the tank v engine.

Then you could braze new fittings to the copper and tap the cases or tank to correspond.

bjbuchanan · « **Reply #14 on:** September 19, 2014, 09:44:35 AM »

My house doesn't roll around much with a hard mounted engine so I can't compare notes but I still think it is a lousy idea.

Bikes with this kinda stuff on it usually don't get ridden anyway so it shouldn't matter in the end huh

70CB750 · « **Reply #15 on:** September 19, 2014, 09:56:49 AM »

He could adapt these hoses:

For some reason I think the rigid copper tubing would do just fine as oil lines; I used copper for air distribution in my shop and it is holding up well even the connection to the compressor.

But it would be a pain to install.

Edit: I just remembered, the oil pressure gauge in my jeep is hard connected to the engine by copper tube. I installed it many years ago, because it is more reliable than electrical pressure sensor and electrical gauge. The tube goes from engine to the dash and as I said it works without issues for 15 years now.

atm cycles · « **Reply #16 on:** September 19, 2014, 10:00:16 AM »

Nonferrous metals do work harden. If annealed it would work fine on a motorcycle or car. As for riding hope that wasn't aimed my way.

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calj737 · « **Reply #17 on:** September 19, 2014, 10:22:26 AM »

BJ - you're right, the water lines in your house don't roll around hooked to an engine, but neither do the oil ones in these bikes. They move relative to the engine as the tank and engine are bolted to the frame. The tank and engine can move very, very, slightly from each other, but copper is supple enough to handle the vibrations of water pressure changes, the thermal expansion and cooling, and would be just fine in this application.

The bends the builder would need to create would actual absorb the expansion and suppress the changes in distance. Unconventional choice, sure. Imprudent choice, no way.

Me, I'd use stainless tubing to alleviate the potential of leaks or corrosion/oxidation perforating the things, but, copper tubing is cheap enough and widely available that a repair could be done quickly from stock at the home center. Try that with stainless tubing...

AbbyRider · « **Reply #18 on:** September 20, 2014, 11:24:00 PM »

I've seen lots of examples of copper being used for oil lines. Wrenchmonkees have used it on a few of their builds.

atm cycles · « **Reply #19 on:** September 21, 2014, 04:03:07 AM »

So nobody makes replacement fittings ?? Seems there would be a market. So many after market parts for these bikes I m a little surprised

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Author Topic: Oil line fitting available cb750 (Read 3165 times)