The oil filter used on the Norton has metric
threads of 16mm X 1.5mm pitch. It is about 3 in diameter and 3
3/8 tall.. One of its original applications was a Simca car (french) 1963-1972.
It was also used on Citroens 2CV, Dyane 4 & 6, Matra, and Peugeot.
More recently, this size was found on my 907 IE Ducati motorcycle. There
are likely many more applications, but they are fairly easy to obtain,
unless K-mart is your only source.
Many people substitute with what they think are good replacements, yet are actually using a very close SAE threaded filter of 5/8-16tpi.
NAPA typically is supplied by WIX , NAPA has them for me the next morning after I order it, about $9 or so, unless they make you pay full retail. Unfortunately WIX officially disclaims (12 August 1988) suitability for the Norton application in writing to me, but gave me no reason why! They make a good filter and I still use it with confidence.
The Ducati filter was $9.50 last time I got one.
Getting a filter has never been a problem for me. I've gotten ten packs from Norvil MC in England for about $4.35ea(2007 over $9). I got a batch of NOS Beck Arnley at a British MC flea market for $2.00 ea (I bought them all).
The fact that many of these filter are of a higher bypass rating than the Norton filter is a slight technical difference, but of no practical concern for our Nortons since they filter the return oil. Please advise me of any corrections or additions, as I have not verified all of them myself. If you have a used filter, one of the untested filter listed below, contact me, and I will test it for it's bypass data. email@example.com
I am not endorsing any particular filter, but just showing ones with the 16mm threads
Part # Bypass pressure tested?
Low bypass group 8-15psi
NVT pn 06-3371 10-14psi yes, I measure it
Crossland 631 probably 10-14psi
Mahle OC 5 12-16psi
Mann W713 13psi
MANN W712/11 15psi NN49
NAPA 1352 (Crossland 631 was once supplied) $8.99 jan 2000
WIPAC CA111 12psi yes
WIX 51352 (OEM to napa)
LOW PRESSURE BYPASS-NO CHECK VALVE
NAPA 1032 8-11psi bypass
16mm x1.5mm thread-3.4 tall x 2.9 OD-gasket 2.73OD x 2.43ID
There is no check valve, but it shouldn't matter- $ 6.78 sell price/$13.05 full list (JAN 2000)
subs for napa 1032 -thanks Bruce
Wix....51032-who makes NAPA
High bypass group 18-23psi
AC X-4 18-20psi Haynes Manual
Beck Arnley 83-0008 18-20psi (GUD Z 102 supplied)
Champion H101 23psi donated by Don Workman
Citroen 54277744, 75491083, 75518393 by cross reference
Crossland 673 18-20psi INOA Tech Digest
Ducati 0905A9960 23psi yes
Ducati 065149960, 090549960 by cross reference
Gilera G400066 by cross reference
GUD Z 102 18-20psi yes, by me
MANN W712/9 21psi INOA Tech Digest
Purolator FC 601 18-20psi yes
Peugot 110979 by cross reference
Talbot 0012851491, 0016339700, 0061501500, 4040613395
Beck-Arnley 041-0241 has supplied knetch AW13
COOPERS Z 64
Fram PH2884 not verified
GUD Z64 not verified
Knetch AW 13
HARMON S-389 Jim K.
Purolator FC 103
Unico LI 774/9
this list is for filters potentialy available in north america
Oil filter housings 06-3139
more to come on the various housing that were available over the years and today...