anyone tried this air filter

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I have not , the real K&N filter does fit , not from personal use , but have seen them mounted several times over the years ….
 
I just fitted a K&N version like that last week. It fitted, hasn’t fallen off, and the engine runs, so that’s all I know for now.
 
Perhaps he’s suggesting he bought one once, fitted it, then periodically serviced it for the past 40 Years?
 
Alan L said:
H

i Concours
I have fitted a K&N element into my Mk2. Is there something I should know? Have I done the wrong thing?
al
Click to expand...
Very touchy subject with some. With me, simple nuts & bolts. I saw fine dust accumulated in the intake horn of all 4 Mikunis on my XS1100. The K&N does not filter as effectively as pleated paper, or oiled foam.
On vehicles with poorly designed OEM air filter housing, (too small filter media area, restrictive) the K&N allowed some more flow (for obvious reasons, "rock screen") and some improvement at high RPM. The Norton air filter is a generous sized design, so no performance increase.
Many, many test performed by labs.
Engine longevity is the issue.
JMWO, mechanic of 54 years.
 
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I ran my K&N filter on my Norton for over 38 years without any problems, remove, clean, dry , reoil (K&N filter oil) put back on, when rebuilding my motor last found no signs of wear from dust or anything caused from the air filter and after over 160k miles on my motor I am still running my original valves and on my first rebore, I am now running different carbs with similar filters but am going back to Amals and the K&N will be going back on, the K&N has never fallen off, is easy to get to and take a whole 30 seconds to remove from the carb's.

Ashley
 
Well give one a go and let us know what you think after a year or so using it, as a bad filter will show signs of damage after a while, K&N have been around for a very long time and have filters for just about anything on the road and track.

Ashley
 
Alan, don’t use a re pop part like this unless you’ve researched that it’s actually demonstrated to be better than the original. Otherwise it’s just not worth it.

Becasue the chances are, it isn’t better. And buying it is false economy.

The chances are it’s cheaper, cos it’s cheaper! Meaning they used cheaper materials and manufacturing methods. If this is the case, the best case scenario is it simply won’t last long, and your saved dollars are wasted. The worst case scenario is that it fails and wire etc gets ingested destroying pistons, bores, etc.

We all bemoan the the slew of cheap, sub standard, often downright unfit for purpose parts and goods (usually from China, et al) that cause us troubles. Buying such stuff just feeds the monster....
 
Alan L said:
H

i Concours
I have fitted a K&N element into my Mk2. Is there something I should know? Have I done the wrong thing?
al
Click to expand...
Very touchy subject with some. We me, simple nuts & bolts. I saw fine dust accumulated in the intake horn of all 4 Mikunis on my XS1100. The K&N does not filter as effectively as pleated paper, or oiled foam.
On vehicles with poorly designed OEM air filter housing, the K&N allowed some more flow (for obvious reasons, "rock screen") and some improvement at high RPM. The Norton air filter is a generous sized design, so no performance increase.
Many, many test performed by labs.
JMW
alan hodge said:
i meant...has anyone used the ebay 'repop' filter vs a 'real' K&N
Click to expand...
Sorry, I did not click on the link, saw K&N in the title, never even considered a cheap Chinese knock off.
 
I've been using this version from MAP for 2 seasons now, no complaints, the mount is angled downwards so the filter fits a bit better than the KN unit. I would never advise foam filters, having experienced a near disaster when a set of UNI's caught fire from a kick back last year. That, to me, is a greater risk

www.mapcycle.com

Norton Commando Dual Inlet High Performance Pod Air Filter

A great alternative to the stock Norton-style filter. More information below:
www.mapcycle.com www.mapcycle.com
 
alan hodge said:
www.ebay.com

New Universal Air Filter Norton 750/850 Commando K&N Style ( R-0990 ) AF0990 | eBay

Universal Dual Air Filter Norton 750/850 Commando K&N Style ( R-0990 ) AF0990 Air Filter. Norton 850 Commando 1974. Norton 750 Commando 1968 - 1974.
www.ebay.com
Click to expand...
My rider came with one (installed by the PO). He had trouble getting is off and on and cut the rubber connectors shorter which makes it a bear to put on so it stays on.

Personally, I'll use it BUT not the one from K&N, get the one from cNw. It's a special order from K&N that is more narrow and easy to get on and off and costs about the same.

K&N filters must be washed an re-oiled when dirty and since they are oiled, they get dirty faster. If you don't properly oil them, they don't filter well.

https://coloradonortonworks.net/k-n-narrow-air-filter-for-amals.html
 
marshg246 said:
My rider came with one (installed by the PO). He had trouble getting is off and on and cut the rubber connectors shorter which makes it a bear to put on so it stays on.

Personally, I'll use it BUT not the one from K&N, get the one from cNw. It's a special order from K&N that is more narrow and easy to get on and off and costs about the same.

K&N filters must be washed an re-oiled when dirty and since they are oiled, they get dirty faster. If you don't properly oil them, they don't filter well.

https://coloradonortonworks.net/k-n-narrow-air-filter-for-amals.html
Click to expand...
Although the website says it's in stock, as of 27 April it was not. I'm waiting on one now.
 
marshg246 said:
My rider came with one (installed by the PO). He had trouble getting is off and on and cut the rubber connectors shorter which makes it a bear to put on so it stays on.

Personally, I'll use it BUT not the one from K&N, get the one from cNw. It's a special order from K&N that is more narrow and easy to get on and off and costs about the same.

K&N filters must be washed an re-oiled when dirty and since they are oiled, they get dirty faster. If you don't properly oil them, they don't filter well.

https://coloradonortonworks.net/k-n-narrow-air-filter-for-amals.html
Click to expand...
I too thought you were asking about the K&N filter. Had no idea there were "K&N style" filters available. I wouldn't use the fake or real K&N filter but do use the cNw narrow real K&N filter.
 
concours said:
... I saw fine dust accumulated in the intake horn of all 4 Mikunis on my XS1100. The K&N does not filter as effectively as pleated paper...
Click to expand...
I have seen fine dust pile up inside of pleated paper aircleaners as well (Honda Accord).
 
I fitted the K&N 0990 to the lightweight Commando as it offers about 1/3 more surface area and same for its airbox capacity vs the narrow K&N. I'm not sure that it's needed, but it can't hurt.
It fitted easily but with little room to spare. That's ok, might as well use up all available space for air filtration!
The stock filter is about 1.5 lbs heavier than the K&N, so it has no place on this bike!
I have tested a K&N for 60,000 miles on the Vin. Visually the bores were perfect. On checking for wear, there was only 1 thou of total taper(wear) at that mileage. Hastings Piston Ring Co says 12 thou is max allowable wear, after that it's time to rebore.
So the K&N is working well on that bike.
I agree with others who have warned about repop K&NS.
I had two of these on another bike. After a few years of use I happened to be inspecting one of the filters. When held up to a light, it was evident that the element paper had disintegrated. The bores on that bike wore out at 12,000 miles due to the non filtering filters.

Glen
 
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