early carbed 900: can't find external oil lines to head or banjos

[Rudemouthsky]

Spiegler refuses to make them for fear that -3AN is insufficient...I found these, intended for a Suzuki:

http://www.bigccracing.com/shop/product.asp?idproduct=138

And in the course of Googling I found this write up that actually recommends restricting oil flow to the heads which I don't quite understand:

http://www.musiccity-doc.org/Technical/2ValveRearHeadCooling.html

So what should I do about these lines? The banjo fittings with the larger holes are difficult to find, so I'm thinking of going with the Goodridge lines and normal banjos but I wanted to get the opinion of you all.

[ducatiz]

>>brainsplosion<<

[Dirty Duc]

this looks like the required big hole bolt
http://pitstopusa.com/i-5065487-aeroquip-steel-10mm-x-1-25-banjo-bolt.html

[Rudemouthsky]

Wowza, before I edited that just now it looked like a 14 year old typed it. More like auto incorrect.

It's 10x1.0. Looks like banjo bolts for turbo charger oil lines are similar also.

[Rudemouthsky]

Ok, Apparently, according to some, the heads don't need the amount of oil that the OE lines are designed to provide. So I guess now I'm just wondering if I can use the AN-3 lines companies like Galfer/Spiegler, etc use with standard banjo fittings and move on. Sorry for such a confusing, poorly written post.

[Speeddog]

If you're talking about the lines from the *cylinders* to the alternator cover, those are return, not delivery.

[stopintime]

If I wasn't typing, I would have in my hand an oil delivery line Kämna made for me. It's intended for cam cover delivery - coming from the oil pressure sensor fitting. (blocking the cylinder passage and converting to outside line, to finish off my stubborn oil leak). It has the ~2mm holes at both ends. I don't know if it's a coincidence, but I'd like to believe that he knows what he's doing.

EDIT: I didn't get it at first - my post is about delivery, while the thread is about return. Please ignore.

[brad black]

can you get them from a dealer?

[Rudemouthsky]

can you get them from a dealer?

Discontinued

[monsta]

I got mine custom made (stainless) any Hydraulic hose shop should be able to do it...

[Rudemouthsky]

If you're talking about the lines from the *cylinders* to the alternator cover, those are return, not delivery.

Since I already have a 996 oil cooler with the line on top for return line, could I run the same setup?

http://motowheels.com/i-6921368-frentubo-cf-cylinder-head-oil-line-testastretta.html

[Rudemouthsky]

I got mine custom made (stainless) any Hydraulic hose shop should be able to do it...

Thanks Monsta. Did you use normal banjos or ones with the larger holes as is standard?

[koko64]

I remember seeing Frentubo oil line kits for the old Monsters.

[Speeddog]

OK, I read that article you linked to.
I was initially skeptical, until I saw it was Bruce Meyers.

I've not done this mod on one, but I've got a recent candidate that may get this.

Just to explain the system a bit, the early cylinders have an oil jacket on them.
Oil is supplied from the crankcase, through a gallery, and across the cylinder/case interface (like many Ducs).
The oil is supplied to the head, through a restrictor bushing that has a ~1mm hole.
the rest of the oil goes into the oil jacket, and drains through those lines back into the cases.

Restricting the banjo bolt hole would push more oil into the head, for the cam/rockers/etc and serve to cool the head better.
I've not completely got my head wrapped around how the restriction pushes the air bubble out of the oil jacket.
Bruce has been fiddling with Ducs for quite a while, so I'm not inclined to think it's wrong.

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Bollocks! That's going to be a persistent problem for the older bikes.
As monsta said, any decent hydraulic hose shop or racecar hose shop should be able to make a pair of those.

I've not got any laying around, so I can't give a length or hose size.

[monsta]

Thanks Monsta. Did you use normal banjos or ones with the larger holes as is standard?

same as standard.