"Full Flow" Oil Filter Kit

What is the consensus on this kit. I have never run a filter on my 750. Not sure I want the added weight or another opportunity for leaks.

You will never need a filter on a Norton as long as you change the oil every few hundred miles and never have a minor mechanical failure.

The first time you have something like a rocker arm adjuster or a cam lobe go bad you will wish you had a filter as the metallic shrapnel from a minor failure will destroy the whole motor. Been there done that. Jim

Much as it goes against the ignorance grain of seeming common sense there is only one time automotive level oil filter has any benefit and that is on initial start up warm up cycle till first oil change, which should be before ya leave home. Only stuff common filters can remove are particles big enough to block oil passages so its common to examine oil filter soon after initial test and retorque to see if unexpected amounts of metal or other swarf show up to indicate a goof up to fix or fine to carry on. Oil filters don't hurt to run and may even help keep oil friction particles somewhat reduced but most of them get thru like birds and fences. The crank centrifugal sludge trap and settling in oil tank are good enough forever as long as "modern" oil changes done 5-10K miles. Fact is there is more downside to added oil filter as a potential tire oiler and extra complexity, expense, mass and hassle. Therefore its a philosophical-emotional decision based on your depth of science facts comfort level. My observations and also a handful of recent reports both find similar amounts of sludge in crank whether it was well used barn find w/o filter or a few seasons restore with filter added. Similar to oil guages only need one on initial run in as Norton supplied a temporary kit to remove for real life operation. I'm am about as oil emotional as anyone so spent ~$300 on fancy hose/fittings and canister oil filter before convinced myself to remove it soon to reduce mass and routing veiwing complexity in my over expensive long suffering Peel project. If ya want the filtering ya imagine you are seeking then must fit a special bypass filter or risk blocking full oil flow and adding hp drag to pump it. Norton oil flows so little volumes its an ox-moron to advertise "full Flow" as even a tiny fuel filter would work for that on sump side of pump. 40-50 micron is considered significant size for friction spaces wear and smaller than a few microns too small to matter.

If you don't want the weight of the original filter set-up then here is a way to do it.



It is a magnafine inline transmission filter. It has the correct paper element inside with more filter area than a spin on filter and a bypass valve at the correct pressure plus a magnet to collect metallic particles. It is available with a 3/8th hose barb on the ends. I use a large rubber o-ring around the outside to keep it from rubbing. Napa has them available.

https://www.google.com/search?q=magnefi ... 1000%3B717

comnoz said:

If you don't want the weight of the original filter set-up then here is a way to do it.

It is a magnafine inline transmission filter. It has the correct paper element inside with more filter area than a spin on filter and a bypass valve at the correct pressure plus a magnet to collect metallic particles. It is available with a 3/8th hose barb on the ends. I use a large rubber o-ring around the outside to keep it from rubbing. Napa has them available.

https://www.google.com/search?q=magnefi ... 1000%3B717

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I've not see those filter before Jim, that's a 'top tip' thanks for sharing.

For those with more taste in fine unneeded components might shop for one like Peel's, temporary one.

With tongue firmly in cheek for Hobot.

What I find amazing is the billions [trillions?] of non government mandated dollars spent in the past on oil filtering technology when it clearly is of no value. :wink: Jim

Wait a minute. Oil filtering is of no value? I need explanation of that one.

I covered the blunt facts above and prior posted the references, so if ya don't care to do the similar study oh well continue in your unreferenced opinions counter to mine. I wrote it don't hurt to run a filter. Ain't hobot's conclusion that they don't do much of what everyone's main reason is, to reduce particle friction wear. I started out looking into the frequency of filter changes till I lost much respect for the need of them. I open filters to see whats caught and a number of cranks now to see what's missed. Don't you?

Oil filters may not filter the extremely fine particles that circulate in an engine as Hobot has pointed out. These fine particles do no immediate damage but will in time wear a motor out. So hobot has a point.

Oil filters are a great help in filtering the not so small particles that may get into the engine oil however. These not so small particles may come from parts chipping or failing or out of a dirty can, oil tank or funnel. If they are not filtered out and are allowed to circulate they will do immediate damage the the insides of your engine. Jim

Thanks, I like that trans filter, might try to find one of these. It looks lightweight enough to just be plumbed inline below the oiltank with no bracket. Wonder if it has any effect with oil pressure since auto trans oil is thinner than motor oil.

Thanks for the filtering tip Jim!
Where did you locate it? I cannot tell from the pic.
Is it significant whether put the return or supply line?

tomspro said:

Thanks for the filtering tip Jim!
Where did you locate it? I cannot tell from the pic.
Is it significant whether put the return or supply line?

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Technically, shouldn't filters go before oil passages but after the pump so as not it impede flow to the pump? That is impossible on a commando engine but that is how most car engines do it.

How did the Norton factory do it.... On the return or before the engine?

elefantrider said:

How did the Norton factory do it.... On the return or before the engine?

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Return. NOT as it's drawn in the 1972 parts book diagram-with the filter on the feed side! :shock: :roll:
http://www.oldbritts.com/oillines.html

GOT IT!
Or should say, will get it:
http://www.ebay.com/itm/INLINE-3-8-MAGNETIC-TRANSMISSION-FILTER-BY-MAGNEFINE-/261385396200

Be careful out there... apparently Amazon sells a knock-off by 'Raybestos' that is made in China and not good quality.

Must ask the question then: how tight can the filter paper passages be made to stop the very fine
contaminants? Ive seen tests that show some brands filter smaller than others. How scientific I dont know.

search this forum on oil filter and online for bypass filtering to see 50 to 5 micron size can get into friction spaces and cause wear so that's what those special filter are aimed at but then only a portion of the oil or risk restricting full flow or need a huge bypass filter. Again don't fret much on filtering good as it is its not that great to hardly tell in Nortons.

Seems like an oil filter is like a condom.....safer to have one than not!

Slick

texasSlick said:

Seems like an oil filter is like a condom.....safer to have one than not!

Slick

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guess that depends on where you put your Norton.
:mrgreen: