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#716433 - 11/24/17 12:35 pm A10 Down for the Count  
Joined: Sep 2008
Posts: 718
Blown Income Offline
BritBike Forum member
Blown Income  Offline

BritBike Forum member

Joined: Sep 2008
Posts: 718
Edgewater, Md
Well yesterday while the turkey was cooking away in the oven my awesome wife looked at me and said "it's pretty nice out take one of the bikes for a ride", don't need to tell me twice so I gathered my gear and out to the shop. Was going to take the Trident out to test how the new clutch cable is working but my A10 gave me one of those looks so I pulled her out, topped her off with some Avgas and away we went.

The ole girl fired right up from her slumber and everything was going great (such a fun bike to ride), got about 10 miles from home and going down a slight incline the engine started to bog down. Down shifted to third to increase revs a bit but still slowing down, pulled the clutch, engine died and coasted to the shoulder. I could still kick the engine thru so I figured must be fuel related, tickled the carbs and gave her a good kick and retired. Turned around to head home and made it about a half a mile pulled into a farmer's road side stand where she shut off.

I checked the oil tank and oil level was good but the oil was still cold, so thought to myself must be the oil pump that failed causing the engine to seize. I can no longer kick the engine thru, can literurally stand on the kick start ram.

Rebuilding the engine is no biggie as it's been since 2012 since the last full year down and she has had a good bit of racing abuse. My concern here is if in fact the pump went bad (SRM high volume pump) this will be the 2nd one in 6 yrs to just fail suddenly. I always check for oil return after starting which it was so this is a little concerning.

Time to start the tear down and access the damage. Would be cool to find a 750cc kit for an A10 hut I don't think there made any longer.

Will post carnage pictures after the tear down.


1955 BSA Bantam D1 Plunger
1956 BSA A10RR Street and LSR Bike
1961 BSA C15S
1966 BSA spitfire
1969 Triumph T100C
1970 Triumph TR6R
1972 BSA Lightning LSR Bike
1974 Triumph T150V
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#716435 - 11/24/17 1:02 pm Re: A10 Down for the Count [Re: Blown Income]  
Joined: Aug 2001
Posts: 6,693
Jon W. Whitley Online content
Jon W. Whitley  Online Content



Joined: Aug 2001
Posts: 6,693
Vermont
That's a bummer., sorry to hear that for you. Good luck with the tear down and rebuild.


Jon W.


1957 6T Thunderbird 650
1968 T100R Daytona 500
1971 TR6R Tiger 650
1970 BSA A65F 650
1955 Tiger 100 - Project

#716442 - 11/24/17 1:46 pm Re: A10 Down for the Count [Re: Blown Income]  
Joined: Sep 2014
Posts: 153
Andrew Dunham Offline
BritBike Forum member
Andrew Dunham  Offline
BritBike Forum member

Joined: Sep 2014
Posts: 153
Ohio
At least your username fits in extremely well with the story! All kidding aside, sorry to hear that.

I would be really interested in seeing if the culprit is the SRM Pump. I've been thinking about getting one soon.


1968 BSA A50
1969 BSA 441 VS
1970 BSA Thunderbolt
#716443 - 11/24/17 2:04 pm Re: A10 Down for the Count [Re: Blown Income]  
Joined: Jul 2001
Posts: 12,154
Lannis Online content
Life member
Lannis  Online Content

Life member

Joined: Jul 2001
Posts: 12,154
Central Virginia
Same here. We A10 owners are looking forward to the post-mortem. We can always learn something so that your experience wasn't a total negative in the big scheme ....

I don't race my A10 so I'm always happy with a nicely rebuilt stock oil pump ....

Lannis


America's great! Only place in the world where the poor and oppressed check on their Food Stamp balance with an $800 smartphone ... !
#716444 - 11/24/17 2:10 pm Re: A10 Down for the Count [Re: Blown Income]  
Joined: Sep 2008
Posts: 718
Blown Income Offline
BritBike Forum member
Blown Income  Offline

BritBike Forum member

Joined: Sep 2008
Posts: 718
Edgewater, Md
Hoping the cam,crank and rods are ok. Not sure what to do if the pump failed again. Granted it's been 6yrs since the last failure but for the amount these things cost they should be bullet proof. The tear down will tell, hopefully the crankmbearing conversion with stood the beating.


1955 BSA Bantam D1 Plunger
1956 BSA A10RR Street and LSR Bike
1961 BSA C15S
1966 BSA spitfire
1969 Triumph T100C
1970 Triumph TR6R
1972 BSA Lightning LSR Bike
1974 Triumph T150V
#716450 - 11/24/17 3:21 pm Re: A10 Down for the Count [Re: Blown Income]  
Joined: Dec 2013
Posts: 3,385
kevin roberts Online content
fefsa
kevin roberts  Online Content

fefsa

Joined: Dec 2013
Posts: 3,385
ohio, usa
not the A10!


Into the distance a ribbon of black
Stretched to the point of no turning back
A flight of fancy on a windswept field
Standing alone my senses reeled
A fatal attraction is holding me fast how
How can I escape this irresistible grasp?
#716462 - 11/24/17 4:47 pm Re: A10 Down for the Count [Re: Blown Income]  
Joined: Feb 2010
Posts: 366
Red Lapierre Online content
BritBike Forum member
Red Lapierre  Online Content
BritBike Forum member

Joined: Feb 2010
Posts: 366
Upstate NY
I have thought of trying something like this in return line to turn a light on and off as a warning system. (2 to 7 psi Adjustable Fuel Pressure Warning Switch) I figure if it can handle gas it would work for oil?? Or if someone makes one just for oil. I'm also guessing there is at least 2 PSI of pressure there.


57 A10 GF
61 A7
61 A10 GF
63 A10 SR
76 CB 125 Honda
76 FLH
2012 FLHTP
#716475 - 11/24/17 6:03 pm Re: A10 Down for the Count [Re: Blown Income]  
Joined: Dec 2004
Posts: 8,947
kommando Online content
kommando  Online Content


Joined: Dec 2004
Posts: 8,947
Scotland
The trouble with the return line is there is no pressure without a restriction just flow.

#716494 - 11/24/17 7:08 pm Re: A10 Down for the Count [Re: Blown Income]  
Joined: Oct 2009
Posts: 426
pushrod tom Online content
BritBike Forum member
pushrod tom  Online Content
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Joined: Oct 2009
Posts: 426
new jersey usa
I'm glad you will giving us the lowdown on the teardown. It will help keep the winter interesting. My own activities will start soon. My new cylinder go here today. UPS picked it up in Scotland yesterday and it arrived on my porch today!! Soon as I get my work area organised I can begin to see how it all fits together. W e are hoping to put the Hornet's stinger into a Triumph or two next season. smile PRT

#716510 - 11/24/17 8:52 pm Re: A10 Down for the Count [Re: Blown Income]  
Joined: Sep 2008
Posts: 718
Blown Income Offline
BritBike Forum member
Blown Income  Offline

BritBike Forum member

Joined: Sep 2008
Posts: 718
Edgewater, Md
Well, pulled the drain plug from the sump and only about 50cc of grey oil came out. Guess this kinda backs up my suspicions of oil pump failure. Hopefully the sezuire is just the piston but I will know more this week once the tear down starts.


1955 BSA Bantam D1 Plunger
1956 BSA A10RR Street and LSR Bike
1961 BSA C15S
1966 BSA spitfire
1969 Triumph T100C
1970 Triumph TR6R
1972 BSA Lightning LSR Bike
1974 Triumph T150V
#716511 - 11/24/17 8:52 pm Re: A10 Down for the Count [Re: kevin roberts]  
Joined: Sep 2008
Posts: 718
Blown Income Offline
BritBike Forum member
Blown Income  Offline

BritBike Forum member

Joined: Sep 2008
Posts: 718
Edgewater, Md
Originally Posted by kevin roberts
not the A10!

The one time I was not thrashing her, go figure.


1955 BSA Bantam D1 Plunger
1956 BSA A10RR Street and LSR Bike
1961 BSA C15S
1966 BSA spitfire
1969 Triumph T100C
1970 Triumph TR6R
1972 BSA Lightning LSR Bike
1974 Triumph T150V
#716512 - 11/24/17 8:56 pm Re: A10 Down for the Count [Re: pushrod tom]  
Joined: Sep 2008
Posts: 718
Blown Income Offline
BritBike Forum member
Blown Income  Offline

BritBike Forum member

Joined: Sep 2008
Posts: 718
Edgewater, Md
Originally Posted by pushrod tom
I'm glad you will giving us the lowdown on the teardown. It will help keep the winter interesting. My own activities will start soon. My new cylinder go here today. UPS picked it up in Scotland yesterday and it arrived on my porch today!! Soon as I get my work area organised I can begin to see how it all fits together. W e are hoping to put the Hornet's stinger into a Triumph or two next season. smile PRT

Tom, have you decided which track you will go to? Not sure if the new ECTA site will work, thinking Loring may be the new spot.

Looking forward to your new setup.


1955 BSA Bantam D1 Plunger
1956 BSA A10RR Street and LSR Bike
1961 BSA C15S
1966 BSA spitfire
1969 Triumph T100C
1970 Triumph TR6R
1972 BSA Lightning LSR Bike
1974 Triumph T150V
#716514 - 11/24/17 9:45 pm Re: A10 Down for the Count [Re: pushrod tom]  
Joined: Dec 2013
Posts: 3,385
kevin roberts Online content
fefsa
kevin roberts  Online Content

fefsa

Joined: Dec 2013
Posts: 3,385
ohio, usa
Originally Posted by pushrod tom
W e are hoping to put the Hornet's stinger into a Triumph or two next season. smile PRT


i'm making a few changes, nothing radical, but just four one-percent improvements for me give 133.2 mph.

i've already paid ahead for one session at loring, so i'll probably be there in the spring.

four percent is all i need, unless one of you buggers raises the bar again.


Into the distance a ribbon of black
Stretched to the point of no turning back
A flight of fancy on a windswept field
Standing alone my senses reeled
A fatal attraction is holding me fast how
How can I escape this irresistible grasp?
#716556 - 11/25/17 1:47 pm Re: A10 Down for the Count [Re: Blown Income]  
Joined: Oct 2009
Posts: 426
pushrod tom Online content
BritBike Forum member
pushrod tom  Online Content
BritBike Forum member

Joined: Oct 2009
Posts: 426
new jersey usa
That 4 is the BFD of this game. Nice to know guys are trying. Mike and I will be working to get up to Loring.

#716573 - 11/25/17 3:59 pm Re: A10 Down for the Count [Re: Blown Income]  
Joined: Jan 2006
Posts: 142
Arnstein Online content
BritBike Forum member
Arnstein  Online Content
BritBike Forum member

Joined: Jan 2006
Posts: 142
Kristiansund. Norway
Blown income, what went wrong with the old SRM pump? They are expensive and ought to be without faults!


Arnstein

BSA Spitfire MK3.800cc
Honda CB450T -71
Laverda RGS 1130cc -85
Ducati 1098 -08
#716595 - 11/25/17 6:51 pm Re: A10 Down for the Count [Re: Blown Income]  
Joined: Aug 2001
Posts: 369
konon Online content
BritBike Forum member
konon  Online Content

BritBike Forum member

Joined: Aug 2001
Posts: 369
Iowa
That's a tough break, hope it's not an issue with all SRM pumps.


1968 BSA Firebird
1200 HD
XS 1100
1972 Rickman 125
#716643 - 11/26/17 12:15 am Re: A10 Down for the Count [Re: Arnstein]  
Joined: Sep 2008
Posts: 718
Blown Income Offline
BritBike Forum member
Blown Income  Offline

BritBike Forum member

Joined: Sep 2008
Posts: 718
Edgewater, Md
Originally Posted by Arnstein
Blown income, what went wrong with the old SRM pump? They are expensive and ought to be without faults!

The shaft on the barrel gear sheared, it was in the bike from 2005 to 2011 but was the old pump design and the body was silver not blue like the current ones but I do agree that these should last forever for the amount they cost. Planning on starting the tear down later this week.


1955 BSA Bantam D1 Plunger
1956 BSA A10RR Street and LSR Bike
1961 BSA C15S
1966 BSA spitfire
1969 Triumph T100C
1970 Triumph TR6R
1972 BSA Lightning LSR Bike
1974 Triumph T150V
#716798 - 11/26/17 10:41 pm Re: A10 Down for the Count [Re: Blown Income]  
Joined: Jan 2004
Posts: 3,539
DMadigan Offline
BritBike Forum member
DMadigan  Offline
BritBike Forum member

Joined: Jan 2004
Posts: 3,539
ca, us
It appears the OPRV is the same as used on the later A65, yes? You could use an OPRV with a banjo port to connect a guage or light.
[Linked Image]

#716817 - 11/27/17 12:28 am Re: A10 Down for the Count [Re: Blown Income]  
Joined: Feb 2010
Posts: 366
Red Lapierre Online content
BritBike Forum member
Red Lapierre  Online Content
BritBike Forum member

Joined: Feb 2010
Posts: 366
Upstate NY
DMadigan
That just what we need to make sure pump is pumping. Who make it? Or who sells it? Do you know what thread is on the port? Looks like a standard flare.
Thanks Red


57 A10 GF
61 A7
61 A10 GF
63 A10 SR
76 CB 125 Honda
76 FLH
2012 FLHTP
#716827 - 11/27/17 1:54 am Re: A10 Down for the Count [Re: DMadigan]  
Joined: Sep 2008
Posts: 718
Blown Income Offline
BritBike Forum member
Blown Income  Offline

BritBike Forum member

Joined: Sep 2008
Posts: 718
Edgewater, Md
Originally Posted by DMadigan
It appears the OPRV is the same as used on the later A65, yes? You could use an OPRV with a banjo port to connect a guage or light.
[Linked Image]

That's nice, may be what I need to help keep an eye on the OP. The OPRV I currently have installed is one from SRM that is supposedly matched to the high volume pump. It looks the same as the A65 units but not sure if the threads are different.


1955 BSA Bantam D1 Plunger
1956 BSA A10RR Street and LSR Bike
1961 BSA C15S
1966 BSA spitfire
1969 Triumph T100C
1970 Triumph TR6R
1972 BSA Lightning LSR Bike
1974 Triumph T150V
#716886 - 11/27/17 3:18 pm Re: A10 Down for the Count [Re: Blown Income]  
Joined: Jan 2004
Posts: 3,539
DMadigan Offline
BritBike Forum member
DMadigan  Offline
BritBike Forum member

Joined: Jan 2004
Posts: 3,539
ca, us
I make these. 7/8"-16 UN OPRV thread, AN-03 (3/8"-24 thread) flair on the port. The piston sits against a Viton seal to reduce leakage at low pressures.

#716893 - 11/27/17 4:22 pm Re: A10 Down for the Count [Re: DMadigan]  
Joined: Aug 2001
Posts: 2,510
MikeG Online content
BritBike Forum member
MikeG  Online Content
BritBike Forum member

Joined: Aug 2001
Posts: 2,510
New Hampshier USA
Originally Posted by DMadigan
I make these. 7/8"-16 UN OPRV thread, AN-03 (3/8"-24 thread) flair on the port. The piston sits against a Viton seal to reduce leakage at low pressures.



something you sell? I'm interested in one if you do.


1960 BSA A10
2007 Suzuki Bandit
1957 A10
(Used to be a Triumph here)
71 Norton Commando
#717272 - 11/30/17 8:18 pm Re: A10 Down for the Count [Re: Blown Income]  
Joined: Jan 2004
Posts: 3,539
DMadigan Offline
BritBike Forum member
DMadigan  Offline
BritBike Forum member

Joined: Jan 2004
Posts: 3,539
ca, us
Hi Mike, sorry, have a video card problem so doing a work around at the moment. I have the banjo OPRVs. E-mail at magno_grail@yahoo.com

#718320 - 12/10/17 1:12 pm Re: A10 Down for the Count [Re: Blown Income]  
Joined: Sep 2008
Posts: 718
Blown Income Offline
BritBike Forum member
Blown Income  Offline

BritBike Forum member

Joined: Sep 2008
Posts: 718
Edgewater, Md
Thought I would update, I still haven't torn the engine down (had our 3rd child on 11/27 so my time has been really limited) hoping to get at her this week as things are starting to be scheduled. I will post up photos as I'm tearing down.


1955 BSA Bantam D1 Plunger
1956 BSA A10RR Street and LSR Bike
1961 BSA C15S
1966 BSA spitfire
1969 Triumph T100C
1970 Triumph TR6R
1972 BSA Lightning LSR Bike
1974 Triumph T150V
#718545 - 12/12/17 7:54 pm Re: A10 Down for the Count [Re: Blown Income]  
Joined: Dec 2013
Posts: 3,385
kevin roberts Online content
fefsa
kevin roberts  Online Content

fefsa

Joined: Dec 2013
Posts: 3,385
ohio, usa
cool
congratulationz!


Into the distance a ribbon of black
Stretched to the point of no turning back
A flight of fancy on a windswept field
Standing alone my senses reeled
A fatal attraction is holding me fast how
How can I escape this irresistible grasp?

Moderated by  Allan Gill, Jon W. Whitley 


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