OK-Supreme Motorcycles

Made in Britain Made in Great Britain Birmingham 1899-1939 OK-Supreme History British Motorcycle Forums

Brief History of the Marque: OK and OK-Supreme

Prior to the First World War, OK motorcycles were fitted with De Dion, Minerva, Precision and Green engines. Subsequently the company fitted its own 292cc two-stroke and Blackburne 250 and 350 engines in both sv & ohv configurations. There were also 348cc machines with oil-coooled Bradshaw engines and JAP versions from 246cc to 496cc. The 248cc racing models were famous. Walter Handley completed the fastest lap in the 1922 IOM TT 250 class at 51.00 mph on a Blackburne-engined OK Supreme. 

From the mid 1920s the racing bikes had JAP engines. OK Supreme fitted their own 248cc engines in the early 1930s, retaining JAP engines for the larger capacities. During this period they added a 348cc OHC engined machine.

Among the last OK-Supreme models were ohv JAP engined high-camshaft versions with 248cc, 348cc and 498cc single-cylinder engines. 

Although production ceased in 1939, a limited number of JAP 350cc racing machines were available until the death of John Humphries, the son of Ernest Humphries who was one of the two founders of OK, Humphries & Dawes.

Sources:  Tragatsch, IOM History

More OK-Supreme History

Fri Aug 24 2012
bmletts<at>sky.com
OK Supreme
OK Supreme G/32
I have just launched a website in an effort to provide more information about the Ok supreme. The URL Is http://oksupreme.comuv.com  if you have any more information about the machines could you email me.
Oxfordshire, UK

Thu Nov 17 2011
tgdpools<at>optusnet.com.au
OK Supreme
OK Supreme 1939
Can someone help me. Is there a book on all models of OK Supreme motorcycles. I have one I want to restore and can't find out any information on it. I need pictures.
Australia

Fri Aug 28 2009
alanjt83.wanadoo.co.uk28ivw
wiring diagram
ok supreme 1939 snowdon ranger
I am currently renovating the above mentioned OK Supreme and I think the wiring has been altered from standard at some time. I desperately need a wiring diagram in order to return the bike to standard. Many regards. Alan
Lancashire

Tue Jun 30 2009
mikephsl.uk
1920 O K 250  2 stroke m/cycle
OK 250 2 stroke
HELP! Any information would assist me greatly in my restoration project. I would like to see some detailed photo's of the handlebar arrangement and anything else you can tell me.
gloucester , UK

Sat Jan 03 2009
jeff.oakshotmail
ok supreme
ok supreme ?
My great uncle Art Senior held the australasian land speed record on an OK Supreme. Could you tell me what year he did this & what year model the ok was. Also his regular race no. if he had one. He also won at phillip island and Bathurst's Vale circuit in 1934.can you confirm if this was done on an ariel hunter.
gold coast, australia

Tue Aug 12 2008
sskvtxmail.ch
OK Supreme Wheels
OK Supreme 350 ccm
Search Wheels rear and front from a OK Supreme 350. 
Thanks Christop
Basel, Switzerland

Thu Jul 03 2008
foxwistwaitrose
OK Supreme Lighthouse engine
I am trying to contact the person who exchanged a 500cc racing car chassis for a so called "Lighthouse" engine and bike frame some time in the 1980s with a Brian Dewey of Peakirk near Peterborough. 
Any help would be appreciated as we are building the cahassis into a car and are keen to trace it's history
Many thanks in anticipation
Roy Hunt
Britain

Sat Apr 05 2008
gantanonvol.net
OK supreme with Jap engine
OK supreme
I need some help I have found a OK sepreme with a small OHV engine ,its a basket case,but frame,petrol tank,guards, and forks are very good.the rest needs restoration.about 80 per cent complete.would anyone  have an idea of what its worth .are these rare bikes.The guy is asking 1750 pounds sterling .would apprecaite your help please.Kind regards Charles
malta

Sat Mar 01 2008
json.ulfgmail
petroltank 1929
OK SUPREME 1929
Am looking for an 1929 petroltank for OK Supreme.
Stockholm
.........
I actually have pictures of a similar tank!
 

OK-Supreme_1929_Tank_1

Fri Nov 09 2007
rogermarghotmail.co.uk
VALUATION
OK SUPREME FLYING CLOUD 1932
WOULD BE GRATEFUL FOR ANY HELP WITH VALUATION
CYPRUS

Thu Oct 04 2007
json.ulfgmail
ok 1929
Does anyone have any info about what modell this Ok is?
Paper says 1929 500 sidevalve.
All kind of info is welcome!

Ulf
sweden
 

OK-Supreme_1929_500cc_Sweden

Fri Sep 07 2007
rfhharveyhotmail
1939 O.K. Supreme 350 cc Jap engined
In1966 when I moved to Canada ,the above bike went "Missing" from my lock up .Plate #AUS 894 .Does any one know if this bike is still running.
Ontario

Sat Jul 28 2007
goldwing643yahoo.co.uk
Motorcycle Sport Magazine PIC
1937 350 OK Supreme
Hi

I am having a clear out of 4 decades of Motorcycle Sport magazines I own and in the November 1976 edition there is a wonderful full page colour picture of a 1937 OK Supreme registration number DXL374. I can'not find an owners club for these bikes but was wondering if the owner/bike still exist and whether he/she would like the Mag for nothing. I am a restorer myself and know what it is like to have memorabilia particularly, of your own model. I am not looking to make money, I just thought it would be a nice thing to do. Should this note find an owner or a tip about how to locate the person then please reply.

Many thanks
Al
London

Sun Jul 15 2007
ericthehorbolyahoo
OK Supreme Motorcycle
1931 OK Supreme Lighthouse 250cc
Would like to correspond with other  OK Supreme Lighthouse owners.  My wife & I have 2 & would like to exchange information.   Thanks. Eric & Teresa
USA

Mon Jun 25 2007
beckydrawert.fsnet.co.uk
electrical
ok supreme silver cloud 250cc 1934
wiring diagram for coil ignition .particularly headlight/ignition switch
devon

Thu May 31 2007
slaapstadhotmail
OK Supreme using BSA hubs
OK ?? - BSA C11
I understand that some OK Supreme motorcycles just prior to WW2 used the BSA C11 wheel hubs. Can anyone confirm this for me please??
Cape Town

Mon Jun 04 2007
chris-675hotmail
1938 OK Supreme
500cc
I have the opportunity to buy a 1938-39 OK Supreme. I believe it was the only year model that had a 500cc Matchless engine. The engine, clutch and gearbox is excellent and its all there other than the magneto. Its very rough cosmetically and needs a thorough restoration and I was wondering if this bike would be worthy of the time and money needed to restore it back to its original condition. Any help in this matter would be greatly appreciated. Regards Chris.
Gold Coast, Australia

Wed May 09 2007
peter.jackson39tiscali.co.uk
query bike's suvival
OK Supreme 250cc  1933
I owned this 1933 250cc Jap engined Ok Supreme Reg. no.HV 2971 in the 1950s. Does anyone know if this bike has survived. I have one photo of it. Peter
Falmouth  UK
 

OK Supreme and Peter with AJS

Fri Apr 06 2007
bevkeebigpond.com 
OK Supreme N34
Would you have any contacts who could help me restore my N34. Thanks Trevor.
Australia

OK Supreme 1934 N34 HOOD

Wed Feb 21 2007
salesqldprimosmallgoods.com.au
Humphries & Dawes OK
1913 OK
I have inherited a 1913 OK (last interim registration 1960) and was wondering about value for insurance purposes. My father was involved in the VMCC NSW for many years (1950's & 60's) and this was the only bike he kept.

Sandra (Brisbane, Qld Aust)
Australia

See the page on Vintage Motorcycle Prices

Mon Feb 19 2007
pearsonrileyxtra.co.nz
Ok Supreme 1937 Phantom
trying to find information about this motorcycle.  we bought at the same time as a T100, and haven't used it much. Its going to be turned into a classic racer, and has a 500JAP engine - koz/f [serial number /s

can any one direct me to more information about this model?  i know it was never raced, at least not at IOM, however, with the sports JAP engine, it will have some decent legs.

also - does anyone know how many were produced?

cheers
NZ

Thu Jan 11 2007
pencadbigpond.net.au
retoration
1938 250 cc flying cloud deluxe OK Supreme
Can anyone help me with information which will allow me to accurately restore this bike.
australia

Mon Jan 08 2007
geordie.gonadtesco.net
Please see atachments
OK
Can yu helpme I'm tring to find some infomation on a OK motorcyle that my randfather rode over Mount Helvellyn in the Lake District UK in September 1921 I will atach the only infomation I have a photostat of a paper cutting from the time plus a photo of him with the bike at the end of his feat, This photo is over 80 years old and the quality is poor if you can tell me the model or any info on this machine I would be very grateful the info I have sent you can be used by yourselves to show more of this marque.
Thanking you
G.Harland
Durham-UK
 

OK Motorcycle Lakes Distict UK 1921

Wed Nov 22 2006
infoeurobrit.com.au
ok supreme
rcb/321  ? silver cloud
I,m looking at purchase of a blue painted racer with bronze head-eng. no rcb/321.is this a 250 or 350-its cammy-not jap-thanks franc australia

Wed Aug 23 2006
forceaccessus.net
OK Supreme Engines
OK Supreme mid 30's
Can anyone tell me if OK SUpreme were fitted with JAP and AJS engines around the mid 30's?  Are these engines the same? Would appreciate any info or clues on where to search. Thanks, Raymond
USA

Sat Apr 29 2006
dfroggattjamaol
I'm trying to find out where the ok supreme had there pemises in birmingham,i would be grateful for any info
staffordshire

Sat Apr 08 2006
the.abelsxtra.co.nz
Information
OK Gladiator
I was wondering how much information you have on these bikes as my Grandson has just inherited one and would like to restore it, I'm not sure of the year of it .

PLEASE HELP ME
NZ

Thu Mar 16 2006
LANDPOWERSERVAOL
INFORMATION FOR RESTORATION
CAN ANY BODY ASSIST ME ON ANY INFORMATION WITH REGARDS TO A 1931 500CC JAP ENGINE OK SUPREME THAT I WOULD LIKE TO RESTORE.
JOHN HIGHLAND

Many thanks for you reply,

Stupidly I dismantled the bike a few years ago, which I have stored safely.
At that time all that was missing (I think) was the magneto, which I would think is pretty standard as there seems to be no trace of mag driven lights been ever on the bike.
My main questions are on what shape and form the bike should be restored in, and where would people recommend to put such things as the wheels for example, to be restored.
The engine requires assembly and its been that long since I dismantled it that I cant remember how to put it back togther !
Hope someone one can help ?
Regards John

Tue Mar 14 2006
jheijdennl51wanadoo.nl
O K  motor bike
Hallo, Can you tell me more about a O K bike this bike has a flattank and  tanktransfers with the name Humpries and Dawes with the year 1923 on it,a 500cc J.A.P motor,is ther a website that i can look,is chuc a bike expensive,what prices can i expect,is suche a bike Rare
greetings from the Netherlands H vd Heijden
Meijel

Fri May 27 2005
camerondadodo.com.au
OK Supreme
Hello there
I have a 1935 Road Knight 600cc, after any info regarding this model or the 500cc Hood.

Sat May 28th
Here is a shot of the bike, they were sold as a sidecar only bike. But how it came to Australia could be different as apparently the sidecars were generally not imported with the bikes but one supplied locally, due to shipping costs. These were also basically a larger capacity version of the 500cc "HOOD" So a lot of the cycle information should be similar.

Currently I am chasing info through the VMCC of NSW and awaiting on the previous owner to detail his restoration. They have mentioned to me in the past that they have "Knights Head" symbol that apparently came from a sidecar which had been attached to an OK Supreme. This I am trying to get a reproduction one made if possible.

I am learning a bit about the bike as I go, one thing I should not forget is that the timing side of the crankshaft is a "left hand" thread.

Thanks for the interest
Dave Cameron
 

OK Supreme Road Knight

5th February 2005
1935 OK Supreme Motorcycle Sales Brochure on Ebay UK

April 25, 2002
OK SUPREME OWNERS: Hello, I am looking to buy a mid to late 1930's OK Supreme motorcycle. I would like to make contact with anyone in the USA who owns one of these machines. I have some literature on this marque I would gladly make copies of for fellow owners. Bill Hooben, hooben at usa

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