Oil Feed

Captain Chaos

Joined

Oct 2, 2006

Messages

34

• Nov 2, 2006

• #1

I want to increase the oil pressure on my 71 750. My understanding is that I need to upgrade the rocker oil feed line to braided. Anything else need to be done?

 

L.A.B.

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Nov 20, 2004

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19,150

• Nov 2, 2006

• #2

What sort of oil pressure are you getting at the moment?

 

Captain Chaos

Joined

Oct 2, 2006

Messages

34

• Nov 2, 2006

• #3

It's set to the stock pressure which I think is 40 or 50 max. A parts supplier told me that the optimum pressure is 10 psi per 1000 rpms. If the bike redlines at 7k, that means a max pressure of 70, which will blow the plastic tubes off of their nipples.

 

L.A.B.

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• Nov 2, 2006

• #4

A braided rocker feed line is certainly more secure (and I use one myself) but personally I don't see much (if any) advantage from exceeding the factory recommended maximum oil pressure?

 

Captain Chaos

Joined

Oct 2, 2006

Messages

34

• Nov 2, 2006

• #5

I dunno, I'm taken this thing to bits and want it to be as good as possible when I put it back together. I run bikes really hard, and since this guy builds race bikes, it seemed like a good idea.

 

kommando

Joined

May 7, 2005

Messages

6,228

• Nov 2, 2006

• #6

Too high a pressure will invert the oil feed seal on the end of the crank, end of all oil pressure. Stick to the current pressure and instead go to a better oil, I use fully Synthetic 15/60W oil.

 

Coco

Joined

Aug 14, 2006

Messages

1,451

• Nov 3, 2006

• #7

L.A.B. said:

A braided rocker feed line is certainly more secure (and I use one myself) but personally I don't see much (if any) advantage from exceeding the factory recommended maximum oil pressure?

Click to expand...

I am in the process of buying all stainless braided oil hose for my MkIII. Not sure if I'm wasting my money or not, but at least it will look nice.

 

Captain Chaos

Joined

Oct 2, 2006

Messages

34

• Nov 3, 2006

• #8

I'm inclined to get them no matter what. I've had trouble with the plastic ones weeping. I'm also going to call Fred Eaton and get to the bottom of this oil pressure business.

 

kommando

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May 7, 2005

Messages

6,228

• Nov 3, 2006

• #9

The problem with the rocker feed is that on a Norton its at full oil pressure, get a big leak and its goodbye big ends. So stainless pipes is good insurance.

 

dave M

Joined

Oct 19, 2005

Messages

1,608

• Nov 5, 2006

• #10

My plastic rocker oil-feed pipe got loose when hot and come adrift when kick starting, depositing oil all over the floor. Fortunately no damage was caused but I have now replaced it with braided hose.