Author Topic: Longstroke camshaft  (Read 2061 times)

Online Rookie_V#60

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Longstroke camshaft
« on: 11.05. 2014 10:31 »
Split from Bikes, Pictures & Members > http://www.a7a10.net/forum/index.php?topic=8358.0 by juanfespi

today i visit the mechanic how is in charge to do the work in the cylinder to put in 62mm bore.
then i started to buy same spare parts but i need to know if there are a camshaft or a place were i can get one.... do you know?? the one how i needed i don't found in Ebay... because its a Longstroke bike... in my office i have de number part, but now i don't remember...

Hi Juan,

To find a Long Stroke camshaft in good condition is difficult today (because LS have eaten it for lack of oil). Perhaps here:
 https://www.draganfly.co.uk/index.php/component/hikashop/product/14693-camshaft/category_pathway-2?Itemid=505
(You will find lot of information about A7 parts on this site)!

 If you have access to a good engine reconditioner or workshop, you can use a better available A65 camshaft, but then you have to grind the shafts down!

Regards Rudolf
1923 James Model 12 500ccm v-twin
1926 Douglas EW 350ccm flat-twin
1936 Motosacoche 500ccm single
1948 BSA A7 Longstroke 500ccm parallel-twin
1955 Ariel Square Four MKII
1960 C1, 1967 C2, 1979 C3-gone!

Online Stephen Foster

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Re: Longstroke camshaft
« Reply #1 on: 11.05. 2014 16:28 »
I was very lucky as the cam in My longstroke "Star Twin" is nigh on perfect ..I am putting together another bottom end & am considering investing in having My spare camshaft reground /hardened , etc ?

I have been advised by a forum member that Newman Cams are very good ?

Wonder if any forum member has any experience in this procedure & this firm please ?

Perhaps if no other option is available to the gentleman in Aregentina this may be a possible solution ?

Steve ..
I own a 1955/56 B.S.A Swinging Arm "Golden Flash" , had it since 1976 .

Offline trevinoz

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Re: Longstroke camshaft
« Reply #2 on: 11.05. 2014 22:40 »
Rudolph,
                    Have you actually fitted an A65 camshaft? Or know of anyone doing it?
Years ago I looked at doing this but it wasn't worth the effort as I had good cams.
Will the lobes run with the A7 followers or are they too high?

Trev.

Offline wilko

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Re: Longstroke camshaft
« Reply #3 on: 12.05. 2014 01:41 »

Online Rookie_V#60

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Re: Longstroke camshaft
« Reply #4 on: 12.05. 2014 22:07 »
Hi Trev,

the camshaft I actually using in my LS is still in specs. But it is the last good one I have and hopefully it will last a while (in the meantime I fitted the second oilfeed to the inlet valves).

But shit can happen so I looked for a A65 cam. As I can measure the lobes and the timing is quite similar to the LS camshaft.  My local workshop friend can do the grinding for little money- so I hope.

Cheers Rudolf   
1923 James Model 12 500ccm v-twin
1926 Douglas EW 350ccm flat-twin
1936 Motosacoche 500ccm single
1948 BSA A7 Longstroke 500ccm parallel-twin
1955 Ariel Square Four MKII
1960 C1, 1967 C2, 1979 C3-gone!

Offline Rusty nuts

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Re: Longstroke camshaft
« Reply #5 on: 13.05. 2014 16:05 »


I have been advised by a forum member that Newman Cams are very good ?

Wonder if any forum member has any experience in this procedure & this firm please ?


Steve ..

Newman Cams are very good, perhaps it was me who told you. Have been away for a while!
They made two new longstroke camshafts (nitrided) for me several years ago from an original I supplied, so they have the profile and should be able to make for anyone requiring one.
1949 A7 Plunger
1947 A7 Rigid Star Twin
1969 Triumph T120R
1972 Triumph T120V

Online Stephen Foster

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Re: Longstroke camshaft
« Reply #6 on: 14.05. 2014 07:36 »
Thanks "Rusty Nuts" , could well have been Yourself .

I intend to ring Newman Cams later Today .

Steve ..
I own a 1955/56 B.S.A Swinging Arm "Golden Flash" , had it since 1976 .

Offline terryk

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Re: Longstroke camshaft
« Reply #7 on: 17.05. 2014 14:41 »
Steve let us know if Newman Cams can make new long stroke cams I would be interested in buying a few.
1950-53 A10 rigid/plungers, 1958-61 A10 super rockets, 1947-50 A7 longstrokes, 1949 Star twin,
1951-54 A7 plungers, 1940s M21, WDM20s,
1948-50s B33s rigid/plunger/swingarm, 1948-50s b31s rigid/plunger/swingarm

Online Stephen Foster

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Re: Longstroke camshaft
« Reply #8 on: 17.05. 2014 17:01 »
Terry ,
I will ring next week now & let the forum know the details , etc .
I own a 1955/56 B.S.A Swinging Arm "Golden Flash" , had it since 1976 .

Offline Craig

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Re: Longstroke camshaft
« Reply #9 on: 18.09. 2017 16:41 »
Resurrecting this topic as in need of a new cam shaft for my LS

Rusty Nuts - you mention that Newman Cams have made a new camshaft for you. I spoke to Ken today and he asked me to send my existing shaft over to him top "copy" as such. That is not possible for me

Any chance you could share with me more information on your order with Newman Cams, like invoice number etc that he could look it up?
He could not off the top of his head recall making one, so hoping to provide him with more detail and that way he will be able to produce one without a sample.

Appreciate the help.


Online bikerjohndavies

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Re: Longstroke camshaft
« Reply #10 on: 18.09. 2017 17:03 »
Hi Craig, I used Newman Cams to make a new 67-695 camshaft for my long stroke A7 in September 2010 and was really impressed with the quality. They also hardened the NOS cam followers I had to match the hardness of the new cam. I spoke to David who knew what I wanted when I quoted the camshaft part number. Cheers, John
1937 Panther M100 Rigid, 1946 Ariel Square 4, 1952 Norton Model 7, 1953 BSA A10SF (WIP), 1958 BSA C15, 1961 Triumph T120R

Offline Craig

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Re: Longstroke camshaft
« Reply #11 on: 19.09. 2017 11:05 »
John - thanks for that additional info.

Just called Newman cams and they advise they have 2 sets of records. High lift and low lift cam profiles.
Any idea which one is correct?

Offline fastharry

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Re: Longstroke camshaft
« Reply #12 on: 03.02. 2018 11:49 »
Be careful of the high lift. i was given a cam from them, and had to send it back as the lobe hit the casing when turned,

Offline Craig

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Re: Longstroke camshaft
« Reply #13 on: 06.02. 2018 09:37 »
Thanks fastharry

I was lucky enough to find an old camshaft for sale in Holland (of all places).
Newman cams have just re-done it for me and also a NOS set of cam followers.

But i will heed your advice and check clearance when installing it.

Offline vinver

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Re: Longstroke camshaft
« Reply #14 on: 04.05. 2018 15:30 »
Craig, mind if I ask what Newman did to re-do  yours ? And what was the cost if you don't mind me asking? Thanks.
1948 A7- the perpetual 25 year restoration.  1954 A10 , 1957 Ariel Huntmaster