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Re: A65 Cast Iron Oil Pump ? [Re: ferretjuggler] #740843
07/05/18 4:15 pm
07/05/18 4:15 pm
Joined: Apr 2005
Posts: 1,702
Mississauga, Ontario.
A
Adam M. Offline
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Adam M.  Offline
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A

Joined: Apr 2005
Posts: 1,702
Mississauga, Ontario.
It suppose to be a solution for good pumps still not making enough pressure during a hot day on hot engine idling under traffic lights smile

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Re: A65 Cast Iron Oil Pump ? [Re: ferretjuggler] #740862
07/05/18 7:32 pm
07/05/18 7:32 pm
Joined: Aug 2015
Posts: 1,289
Bolton Lancs UK
A
Andy Higham Offline
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Andy Higham  Offline
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A

Joined: Aug 2015
Posts: 1,289
Bolton Lancs UK
Is spending money on good equipment a good investment?
In a word YES, a SRM pump costs £300 how much does repair after oil pump failure cost?


BSA B31 500cc "Stargazer"
Greeves 200cc "Blue Meanie"
Greeves 350
Greeves 360 Challenger
Suzuki GSX1100 EFE "Sorcerers Apprentice"
GM500cc sprint/LSR bike "Deofol"
Jawa 500cc "Llareggub"
2003 Aprilia RSV Mille "Lo Stregone"
'35 OK Supreme
'36 OK Supreme
Re: A65 Cast Iron Oil Pump ? [Re: ferretjuggler] #740885
07/05/18 10:21 pm
07/05/18 10:21 pm
Joined: Jan 2014
Posts: 4,080
Aus
N
NickL Offline
BritBike Forum member
NickL  Offline
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N

Joined: Jan 2014
Posts: 4,080
Aus
Never having had an oil pump 'fail' or in fact never knowing anyone having an oil pump 'fail' i wouldn't know.
I've known a few blokes who have ridden around with pumps that were not much good, flickering oil lights etc, but after rebuilding them they were ok.
If spending loadsa money on good equipment is such a great idea, what are we all doing riding these old pieces of garbage?
Surely we should all be driving Bentley's or Bugatti's.


No-one expects the Spanish Inquisition................
Bring in the 'Comfy Chair'
Re: A65 Cast Iron Oil Pump ? [Re: ferretjuggler] #740948
07/06/18 12:02 pm
07/06/18 12:02 pm
Joined: May 2013
Posts: 5,076
Rotherham - S. Yorkshire
Allan Gill Offline

BritBike Forum member
Allan Gill  Offline

BritBike Forum member

Joined: May 2013
Posts: 5,076
Rotherham - S. Yorkshire
Im interested as to why the hated for the SRM pump? (somethings like the OPRV, are something I would avoid after knowing so far of 3 that have stuck) but I don't beleive they make the pumps them selves. mounting the pump properly, and to correct torque setting (7ft/lb and as this isn't a lot, I locktite my screws in position) with a well fitting gasket (most dont fit correctly) I have had no trouble what so ever with my SRM oil pump, neither has anyone else that I know of.


beerchug
Re: A65 Cast Iron Oil Pump ? [Re: ferretjuggler] #740951
07/06/18 12:23 pm
07/06/18 12:23 pm
Joined: Dec 2004
Posts: 9,593
Scotland
kommando Online content
BritBike Forum member
kommando  Online Content
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Joined: Dec 2004
Posts: 9,593
Scotland
Never had an SRM pump so cannot comment, but they had supplied 2 incorrect parts in the only 2 orders I have placed on them. Brake spindles missing the greasing holes and spokes with the wrong gauge. So not going to bother ordering again, also sort of weird for them to recommend not to fit a filter in the return line, where do they get the logic for that from.

Re: A65 Cast Iron Oil Pump ? [Re: ferretjuggler] #740979
07/06/18 8:02 pm
07/06/18 8:02 pm
Joined: Jan 2004
Posts: 3,874
ca, us
D
DMadigan Offline
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DMadigan  Offline
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D

Joined: Jan 2004
Posts: 3,874
ca, us
Changing from the 3:1 to 2:1 ratio would be expensive unless you can find stock gears that can be modified. Worm gears are not easy to make without a corn cobb hob that rotates the gear with the cutter. Spur gears can be made by a mill or broaching which is much cheaper.
There are not a lot of viable design alternatives to the stock setup due to space and mounting.
I had previously proposed making a new pump using gerotors out of a Suzuki, easy to get and far cheaper than having custom gears made. Off the shelf spur gears can be bought and modified but with enough volume (not in the 1000's) the price comes down to where the blanks can be made and the teeth broached for less.
[Linked Image]
The interest petered out so I did not go further.

Re: A65 Cast Iron Oil Pump ? [Re: Allan Gill] #740998
07/06/18 11:16 pm
07/06/18 11:16 pm
Joined: Jan 2014
Posts: 4,080
Aus
N
NickL Offline
BritBike Forum member
NickL  Offline
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N

Joined: Jan 2014
Posts: 4,080
Aus
Originally Posted by Allan Gill
Im interested as to why the hated for the SRM pump? (somethings like the OPRV, are something I would avoid after knowing so far of 3 that have stuck) but I don't beleive they make the pumps them selves. mounting the pump properly, and to correct torque setting (7ft/lb and as this isn't a lot, I locktite my screws in position) with a well fitting gasket (most dont fit correctly) I have had no trouble what so ever with my SRM oil pump, neither has anyone else that I know of.


No hatred for the SRM pump from me Allan, just questioning the need for it in a lot of cases.
All i am saying is that a well built and well fitted standard unit is fine. If an SRM pump is subjected to over tightening or being rebuilt with hermatite etc it would suffer similar faults as the standard unit.
The idea David Madigan came up with is a better way forward, although i think it would need a better relief valve setup
especially if used on an end fed engine. I would think he would have to make at least 20 off batches to get around the SRM price.


No-one expects the Spanish Inquisition................
Bring in the 'Comfy Chair'
Re: A65 Cast Iron Oil Pump ? [Re: ferretjuggler] #741009
07/07/18 1:30 am
07/07/18 1:30 am
Joined: Dec 2003
Posts: 116
Pittsburgh,Pa.
R
Redd32 Offline
BritBike Forum member
Redd32  Offline
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R

Joined: Dec 2003
Posts: 116
Pittsburgh,Pa.
I would think an end feed engine wouldn't be as critical on oil pressure? All the oil going to rod bearings.

Re: A65 Cast Iron Oil Pump ? [Re: ferretjuggler] #741031
07/07/18 8:10 am
07/07/18 8:10 am
Joined: Sep 2004
Posts: 877
Farnham, Surrey, UK
gunner Offline
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gunner  Offline
BritBike Forum member

Joined: Sep 2004
Posts: 877
Farnham, Surrey, UK
I think DMadigan's gerotor pump is an excellent design and I'm sure there would be be plenty of interest. Dave, are you planning on making a batch anytime?


1968 A65 Firebird
1967 B44 Shooting Star
1972 Norton Commando
Re: A65 Cast Iron Oil Pump ? [Re: ferretjuggler] #741034
07/07/18 9:54 am
07/07/18 9:54 am
Joined: Aug 2015
Posts: 1,289
Bolton Lancs UK
A
Andy Higham Offline
BritBike Forum member
Andy Higham  Offline
BritBike Forum member
A

Joined: Aug 2015
Posts: 1,289
Bolton Lancs UK
There would be lots of interest until wallet time.
It amazes me that people will spend thousands on paint and chrome but become tight as a fishes arse when it comes to spending money on engine components


BSA B31 500cc "Stargazer"
Greeves 200cc "Blue Meanie"
Greeves 350
Greeves 360 Challenger
Suzuki GSX1100 EFE "Sorcerers Apprentice"
GM500cc sprint/LSR bike "Deofol"
Jawa 500cc "Llareggub"
2003 Aprilia RSV Mille "Lo Stregone"
'35 OK Supreme
'36 OK Supreme
Re: A65 Cast Iron Oil Pump ? [Re: Andy Higham] #741102
07/08/18 12:47 am
07/08/18 12:47 am
Joined: May 2004
Posts: 3,876
Sydney Australia
B
BSA_WM20 Offline
BritBike Forum member
BSA_WM20  Offline
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B

Joined: May 2004
Posts: 3,876
Sydney Australia
Originally Posted by Andy Higham
Is spending money on good equipment a good investment?
In a word YES, a SRM pump costs £300 how much does repair after oil pump failure cost?


We all know that however it requires logical thinking.
We also know there is a better chance of being struck by lightning while crossing the road pushing our broken down motorcycle than winning a lottery
However most will happily fork out for a lottery ticker because it MIGHT happen to me but won't pay for the pump because it WON'T happen to me, till it does.

As I have regularly mentioned in the 30 years I have been involved with the BSa club almost no one has asked "Who makes the best or where can I get the best or eve is there a better quality"
99.9999999999999999999999999 % of the enquireies I have gotten was " Is there a Cheaper"

And if you want a confirmation then shearch this forum for the words "Better quality" &" Cheaper"
The fromer might bring up a few dozen threads and the latter will be hundreds of pages.


Bike Beesa
Trevor
Re: A65 Cast Iron Oil Pump ? [Re: ferretjuggler] #741183
07/08/18 5:55 pm
07/08/18 5:55 pm
Joined: Jan 2004
Posts: 3,874
ca, us
D
DMadigan Offline
BritBike Forum member
DMadigan  Offline
BritBike Forum member
D

Joined: Jan 2004
Posts: 3,874
ca, us
Rotors are about $30 each, stock spur gears are $15 and $20. Need to remachine the gears and make the body and shaft. A few alignment pins and mounting screws. Can be done for a lot less than 300GBP. Would need some testing of course.

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