Author Topic: bsa a10 oil pump gasket  (Read 2626 times)

Offline rocket man

  • Valued Contributor
  • ****
  • Join Date: Mar 2009
  • Posts: 466
  • Karma: 2
bsa a10 oil pump gasket
« on: 25.11. 2009 19:32 »
this is a gasket srm do which i think is a good idea
as it does away with the washer
Good Advice
0
No reactions

Online muskrat

  • Global Moderator
  • Wise & Enlightened
  • **
  • Join Date: Jul 2009
  • Posts: 8431
  • Karma: 111
  • Lithgow NSW Oz
    • Shoalhaven Classic Motorcycle Club Inc
Re: bsa a10 oil pump gasket
« Reply #1 on: 26.11. 2009 11:54 »
Good idea. I have seen many pumps distorted due to the wrong thickness washer. It's on my next SRM shopping list.
Cheers
Good Advice
0
No reactions
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

Offline Desburnett

  • A's Best Friend
  • ***
  • Join Date: Aug 2009
  • Posts: 117
  • Karma: 0
  • BSA A7 SS, Fazer 1000, Norton Commando 850
Re: bsa a10 oil pump gasket
« Reply #2 on: 26.11. 2009 15:46 »
I used this type as it was included in the gasket set from SRM. I belive it was derived from the later A50 A65 engines but is retro fit for our A7s and A10s
Good Advice
0
No reactions

Offline DazSeaton

  • Nottingham, England
  • A's Best Friend
  • ***
  • Join Date: Dec 2011
  • Posts: 76
  • Karma: 0
  • 1959 BitSA Super Rocket
Re: bsa a10 oil pump gasket
« Reply #3 on: 06.03. 2013 20:32 »
Good idea. I have seen many pumps distorted due to the wrong thickness washer. It's on my next SRM shopping list.
Cheers
worried now. when i reassemled my pump after replacing the worm drive i put a m6 metal washer behind the front bolt to bring the drive forward as the rev counter spindle seemed to be dragging on the rear of the exit hole in the timing case (although this was before bolting the cover on. think will strip down and remove it. perhaps will expand the hole in the timing case instead.

Good Advice
0
No reactions
If you don't start, I'm going to give you a damn good thrashing!!!

1959 BSA Super Rocket 650
2007 Suzuki Bandit 1250 SA

Online muskrat

  • Global Moderator
  • Wise & Enlightened
  • **
  • Join Date: Jul 2009
  • Posts: 8431
  • Karma: 111
  • Lithgow NSW Oz
    • Shoalhaven Classic Motorcycle Club Inc
Re: bsa a10 oil pump gasket
« Reply #4 on: 07.03. 2013 00:47 »
Would be better to make a gasket like the A50/65 the thickness required to get the rev counter spindle right. Once that hole is opened up it's not std anymore, and may cause problems further down the track,
Cheers
PS, the thickness of the inner timing cover to crankcase gasket can also be a factor.
Good Advice
0
No reactions
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

Offline nagrod

  • A's Best Friend
  • ***
  • Join Date: Aug 2010
  • Posts: 47
  • Karma: 1
  • 1960 BSA Super Rocket
Re: bsa a10 oil pump gasket
« Reply #5 on: 07.03. 2013 00:57 »
I left the front bolt washer/gasket out by mistake, what happened to me was that it put just enough stress on the tach drive spindle to break the ears off it. I didn't discover it until the tach quit.

Rick '60 A10
Good Advice
0
No reactions
'Never again. But that's what I said the last time.'


Offline A10Boy

  • Wise & Enlightened
  • *
  • Join Date: Jun 2008
  • Posts: 1075
  • Karma: 11
  • Solihull, Near Birmingham England.
Re: bsa a10 oil pump gasket
« Reply #6 on: 07.03. 2013 13:45 »
The pump face is machined to a flat plane, so is the crankcase so in theory the gasket washer on the stud needs to be the same thinckness as the gasket. I always check the pump with a straight edge and when I put them back together I cut out a washer sized piece of the old gasket and use that on the front fixing instead of a hard washer. I do this on all A10s and it works well. I guess that's what the SRM gasket is doing.



Good Advice
0
No reactions
Regards

Andy

1958 Super Rocket
Plus
1974 Kawasaki Z1a
Yam XJR 1300