The BSA A7-A10 Forum

Technical => A7 46-50 Long Stroke => Topic started by: Rookie_V#60 on 11.05. 2014 10:31

Title: Longstroke camshaft
Post by: Rookie_V#60 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
Title: Re: Longstroke camshaft
Post by: Stephen Foster 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 ..
Title: Re: Longstroke camshaft
Post by: trevinoz 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.
Title: Re: Longstroke camshaft
Post by: wilko on 12.05. 2014 01:41
  2 of them for sale here in Oz. Same bloke. 50 bucks, take a chance.  http://www.ebay.com.au/itm/BSA-A7-LONGSTROKE-CAMSHAFT-/191145520367?pt=AU_Motorcycle_Parts_Accessories&hash=item2c81292cef&_uhb=1
Title: Re: Longstroke camshaft
Post by: Rookie_V#60 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   
Title: Re: Longstroke camshaft
Post by: Rusty nuts 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.
Title: Re: Longstroke camshaft
Post by: Stephen Foster on 14.05. 2014 07:36
Thanks "Rusty Nuts" , could well have been Yourself .

I intend to ring Newman Cams later Today .

Steve ..
Title: Re: Longstroke camshaft
Post by: terryk 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.
Title: Re: Longstroke camshaft
Post by: Stephen Foster on 17.05. 2014 17:01
Terry ,
I will ring next week now & let the forum know the details , etc .
Title: Re: Longstroke camshaft
Post by: Craig 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.

Title: Re: Longstroke camshaft
Post by: bikerjohndavies 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
Title: Re: Longstroke camshaft
Post by: Craig 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?
Title: Re: Longstroke camshaft
Post by: fastharry 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,
Title: Re: Longstroke camshaft
Post by: Craig 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.
Title: Re: Longstroke camshaft
Post by: vinver 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.
Title: Re: Longstroke camshaft
Post by: vinver on 12.05. 2018 04:02
Well, today's mail brought treasure in the form of a 67-695 cam and bits of Longstroke engine off e-bay. Was described as Plunger A7/A10 parts and I was the lone bidder. Postage nearly matched bid price, and while worn, the cam is not bad, suitable for a core to send to Newman.
 *smile*
Will update as I go along to see what Newman can do for me.
Title: Re: Longstroke camshaft
Post by: Craig on 12.06. 2018 03:13
Morning

Yes Newman cams did rework my spare cam shaft.

BSA A7 Cam Grind and Heat Treat @ GBP45
BSA A7 Cam Followers Grind H/Treat @GBP17.50 each = GBP70.00

Service was great and work looks good. I have not had chance to fit it to bike yet (gathering the necessary for complete bottom end rebuild) so don;t know about fit and performance yet.

Craig
Title: Re: Longstroke camshaft
Post by: vinver on 30.11. 2018 04:31
My e-bay find has more wear than expected, and may be too far worn for Newman to regrind (accordning to specs on their website) . May have to plunge for a new one.   *sad2*