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BSA A65 clicking engine sound #704961
08/14/17 12:44 pm
08/14/17 12:44 pm
Joined: Aug 2014
Posts: 43
Czech republic, Europe
J
Jan Konecny Offline OP
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Jan Konecny  Offline OP
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Joined: Aug 2014
Posts: 43
Czech republic, Europe
Dear gentlemen,
I noticed a sound coming from my BSA A65 L/R . I am not sure if it´s new , or it has been there
for some time, valves were always making some noise, but I guess that´s natural.
My problem is, as I learn more about these bikes, the more I care and the more I notice
all kinds of sounds or phenomenons and I am not sure if they are good or bad.

I checked the primary chain tension and it was OK, if it´s filled with oil (using ATF)
it´s not making much noise. This sound is coming more from the timing side, at least that´s what I think.
It could be best described as a clicking sound, not sure if it´s already a knocking sound, it´s more
subtle than knocking I guess. I am not sure if it´s just a valves doing their job, or maybe pushrods,
or bearing at the end of its road. Thank you very much !!!!

Last edited by Jan Konecny; 08/14/17 12:56 pm.
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Re: BSA A65 clicking engine sound [Re: Jan Konecny] #704972
08/14/17 1:55 pm
08/14/17 1:55 pm
Joined: Oct 2001
Posts: 241
Monclova
S
sloppyoil Offline
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Posts: 241
Monclova
sounds like a BSA to me.

Re: BSA A65 clicking engine sound [Re: Jan Konecny] #704986
08/14/17 4:12 pm
08/14/17 4:12 pm
Joined: Aug 2001
Posts: 3,918
argyll. scotland, uk
gavin eisler Online content
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gavin eisler  Online Content
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argyll. scotland, uk
Sounds like mine.


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: BSA A65 clicking engine sound [Re: Jan Konecny] #705029
08/14/17 9:45 pm
08/14/17 9:45 pm
Joined: Aug 2015
Posts: 82
Gippsland, Vic, Australia
M
mickjmag Offline
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Gippsland, Vic, Australia
Sounds like normal valve clatter to me!
Mine had a broken inner valve spring when i bought it "now that was a ticking sound" shocked


Mick M, in OZ
1965 Thunderbolt Rocket.
Re: BSA A65 clicking engine sound [Re: Jan Konecny] #705031
08/14/17 9:53 pm
08/14/17 9:53 pm
Joined: Apr 2015
Posts: 47
Florida
B
BillD47 Offline
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Florida
I had a medium loud rhythmic click, but not a knock, on my 66 Spitfire. Have the pistons been replaced on your bike? My were and the sound was one of the intake valves catching the valve cutout on the piston as it was moving away from TDC. The solution was to relieve the cutout slightly with a Dremel. Only took about off about .005 to .008" to do the trick.
If the noise is not too loud and more like chatter, I agree it's a BSA.

Re: BSA A65 clicking engine sound [Re: Jan Konecny] #705032
08/14/17 9:54 pm
08/14/17 9:54 pm
Joined: Jan 2004
Posts: 3,727
ca, us
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DMadigan Offline
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ca, us
Put a long handled screw driver to various parts of the engine and the handle to your ear to locate where the sound is coming from.

Re: BSA A65 clicking engine sound [Re: DMadigan] #705075
08/15/17 3:39 am
08/15/17 3:39 am
Joined: Oct 2008
Posts: 1,681
Canada
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LarryLebel Offline
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Canada
The sound sounds ominous to me. Is the motor only running on one cylinder?

Re: BSA A65 clicking engine sound [Re: Jan Konecny] #705089
08/15/17 10:25 am
08/15/17 10:25 am
Joined: Aug 2014
Posts: 43
Czech republic, Europe
J
Jan Konecny Offline OP
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Jan Konecny  Offline OP
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Joined: Aug 2014
Posts: 43
Czech republic, Europe
Thank you for your replies,
LarryLebel - no, the engine ran on 2 cylinders

Re: BSA A65 clicking engine sound [Re: Jan Konecny] #705090
08/15/17 10:41 am
08/15/17 10:41 am
Joined: Aug 2001
Posts: 3,918
argyll. scotland, uk
gavin eisler Online content
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gavin eisler  Online Content
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argyll. scotland, uk
Sounds like normal valve gear clatter, some folks have claimed a quieter motor has is possible with fresh idler pinion bushes. I tried that and it made little difference , although i did change the idler pinion and cam pinions at the same time. Some of the tapping may be idler pinion end float, this can be shimmed out, you can check this by removing the ignition advance and retard mech, then pull / push on the pinion shaft to test for end float.
Compared to an iron top end A10 an A65 sounds like a bag of spanners, you get that with them sir.


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: BSA A65 clicking engine sound [Re: Jan Konecny] #705140
08/15/17 6:25 pm
08/15/17 6:25 pm
Joined: Sep 2004
Posts: 798
Farnham, Surrey, UK
gunner Online content
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gunner  Online Content
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Farnham, Surrey, UK
I can hear the clicking noise which is probably valve gear related and normal.

More worringly, I can hear a steady knocking noise which could be caused by many things.......


1968 A65 Firebird
1967 B44 Shooting Star
1972 Norton Commando
Re: BSA A65 clicking engine sound [Re: Jan Konecny] #705162
08/15/17 10:08 pm
08/15/17 10:08 pm
Joined: Aug 2001
Posts: 802
San Luis Obispo, CA
Richard Phillips Offline
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San Luis Obispo, CA
Thats a loud click. What happens when you rev it. Regardless for your own piece of mind you need to find it. If its valve clatter you can check it with the long screw driver or better a mechanics stethoscope. You could run it without the valve cover and the ignition cover to help focus on the click.

Re: BSA A65 clicking engine sound [Re: gunner] #705182
08/16/17 2:42 am
08/16/17 2:42 am
Joined: Oct 2007
Posts: 1,537
Auckland NZ
Ignoramus Offline
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Auckland NZ
Originally Posted by gunner
I can hear the clicking noise which is probably valve gear related and normal.

More worringly, I can hear a steady knocking noise which could be caused by many things.......


yep there is way more than just tappet noise going on there .........."underneath " the rattle and clatter there is a loud knock ............i would investigate this in short order sound like its coming from teh bottom end .........possibly a realy excessive crank end float ....neglect it at your peril.....


"There's the way it ought to be and there's the way it is" (Sgt Barnes)
Re: BSA A65 clicking engine sound [Re: Jan Konecny] #705243
08/16/17 9:23 pm
08/16/17 9:23 pm
Joined: Nov 2011
Posts: 126
Northern Ireland
B
B31 Ally Offline
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Northern Ireland
Sounds like any normal A65 that I ever heard running inside a garage, I can hear the clicking but as I never owned a brand new A65 I cant say what they sounded like when they were new, the camera is picking up the exhaust sound of one strong cylinder echoing in the room the bike is running in.

Re: BSA A65 clicking engine sound [Re: Jan Konecny] #705297
08/17/17 12:57 pm
08/17/17 12:57 pm
Joined: Jun 2015
Posts: 151
wales uk
R
richiedan40 Offline
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wales uk
It takes a good ear and a reasonable level of experience to differentiate between good and bad noises on an a65 , inside a garage is not really the place to listen for unusual noises , as the a65 unit engine makes many.
There can be end float knocks when shes not balanced correctly , normal valve clatter , piston slap when cold depending on what pistons you are using , clutch basket clatter , and of course the noises you don't want.
listen to it outside when warm.
A slack tappet will click as the pushrod jumps into its seat , I actually had an over adjusted exhaust valve that would click when hot .
Eliminate these things 1st before worrying. If its serious itll get worse , hopefully letting you know before giving in.
PS when my big end went due to faulty OPRV , it sounded like someone hitting the rocker box with a spanner , quite loud and nothing like the growl you get on a car engine failing.
RE set your tappets with care and accuracy , run till warm , and listen again outside.


1969 BSA A65 Lightning
1994 moto guzzi California
Triumph sprint GT
1971 BSA B50 Victor special
1968 BSA B44 SS
Re: BSA A65 clicking engine sound [Re: Jan Konecny] #705459
08/19/17 8:37 am
08/19/17 8:37 am
Joined: Aug 2014
Posts: 43
Czech republic, Europe
J
Jan Konecny Offline OP
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Jan Konecny  Offline OP
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Joined: Aug 2014
Posts: 43
Czech republic, Europe
Thank you for your posts, I will focus on it.
When I was setting valve clearence I´ve noticed that left exhaust one was more lose,
meaning, that the spring which is inside the rocker and it pushes the rocker to its place,
was allowing slight movement of the rocker from left to right when I applied force with my fingers.
The other rockers did the same, but the left exhaust one required much less force to do so.

Re: BSA A65 clicking engine sound [Re: Jan Konecny] #705467
08/19/17 12:19 pm
08/19/17 12:19 pm
Joined: Oct 2006
Posts: 2,665
Elburn, Ill. USA
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Irish Swede Online content
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Elburn, Ill. USA
If you think valve gear chatter is "noisy" in an A65, ride a Triumph.

I used to live by a major county highway, and we could hear it was a Triumph coming
because we could hear the valve clatter before hearing the exhaust.

An A65? All we heard was the exhaust.

I've ridden both, and A65 valve gear noise is not noticeable to me, by comparison.

Re: BSA A65 clicking engine sound [Re: Irish Swede] #705478
08/19/17 3:14 pm
08/19/17 3:14 pm
Joined: May 2005
Posts: 3,821
ohio
shel Offline
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ohio
Originally Posted by Irish Swede
If you think valve gear chatter is "noisy" in an A65, ride a Triumph.


Try a Trident with clip-ons and rearsets, puts your head right above and down closer to the tank.
Valve clearance is like oil, some is better than none.


When given the choice between two evils I picked the one I haven't tried before
Re: BSA A65 clicking engine sound [Re: Jan Konecny] #705479
08/19/17 3:19 pm
08/19/17 3:19 pm
Joined: Aug 2001
Posts: 3,918
argyll. scotland, uk
gavin eisler Online content
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argyll. scotland, uk
The spring end float washer is usually called a "Thackeray washer" these can get tired. If you fit a new one take the opportunity to check the head bolt torque settings which can only be reached with the exhaust rockers removed (do them all , not just these two, follow the book pattern). First disengage the exhaust push rods at the top, a large adjustable spanner over the rocker arm valve end can be used to depress the valve and drop out the push rods.
before knocking the spindle through heat the alloy support bosses, they can be pretty tight.
Its easy to mash these washers when re fitting the spindle, Ger had a good tip to align them , use a long tapered round paint brush handle to align the washers to make fitting the spindle a little easier.

have a small magnet on a stick handy for when you drop a washer into the pushrod tunnel, I always need this.


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: BSA A65 clicking engine sound [Re: DMadigan] #705521
08/20/17 3:04 am
08/20/17 3:04 am
Joined: Mar 2016
Posts: 57
Kentucky
L
Linden Offline
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Linden  Offline
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Joined: Mar 2016
Posts: 57
Kentucky
Originally Posted by DMadigan
Put a long handled screw driver to various parts of the engine and the handle to your ear to locate where the sound is coming from.


I have a stethoscope that I got at Harbor Freight that does that much better than the screwdriver. But the screwdriver works too. Narrow the problem down before you try to guess what parts you are going to order.

Re: BSA A65 clicking engine sound [Re: Jan Konecny] #705531
08/20/17 9:00 am
08/20/17 9:00 am
Joined: Feb 2012
Posts: 294
Southampton UK
P
Peter Gascoigne Offline
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Southampton UK
I'm with those who would worry about the knocking noise. The rest of the clatter is "normal", the knocking isn't.


1971 BSA A65 Lightning "Bitsa"
1966 BSA A65 "Beezuki" with GT550 two-stroke engine
1974 Triumph T150 830cc
1975 Suzuki GT550
1975 Laverda 1000 3C
1986 Yamaha SRX 600
Re: BSA A65 clicking engine sound [Re: Jan Konecny] #705747
08/22/17 8:41 am
08/22/17 8:41 am
Joined: May 2013
Posts: 4,847
Rotherham - S. Yorkshire
Allan Gill Offline

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Rotherham - S. Yorkshire
I know my phone picks up noises on bikes which can't normally be heard, yet the phone seems to pick them up and amplify them...

The knocking could be anything but most likely crank endfloat. This should be easy enough to check! Having not yet having dealt with a bushed crank (all mine have been needle roller) I do not know the outer limit of wear but at build .003" is where your aiming. Although if its an LR bike then were talking c1965? which should have a ball bearing DS anyway, unless its been swapped out for the later roller bearing. However this should be limiting end float.

The clatter i would put down to the timing gears, good matched pairs help although none of mine have ever matched, I just seem to be lucky with the set I have, new idler pinion and bushes which have been line reamed make a difference too.

A change of oil will also make a difference, what viscosity are you running?


beerchug
Re: BSA A65 clicking engine sound [Re: Jan Konecny] #706028
08/24/17 6:27 am
08/24/17 6:27 am
Joined: Aug 2014
Posts: 43
Czech republic, Europe
J
Jan Konecny Offline OP
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Jan Konecny  Offline OP
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Joined: Aug 2014
Posts: 43
Czech republic, Europe
Hello,
this is 1964 LR, I am using 10W-40 as engine oil.
I checked the engine with stethoscope, but since I am not experienced at this, I didn´t know
what to look for. But I have to admit the timing side was more noisy than the left side, I listened at the top
of the side covers. When I listened to cylinders I heard just very light swooshing, symmetrical on both sides, when
I put stethoscope on valve cover I heard vigorous clatter as it probably should be.
Back to the timing side , when I revved up the engine I could distinguish a sort of whining sound.

I guess the engine needs some professional care, I hope I find somebody capable in Czech republic.

Re: BSA A65 clicking engine sound [Re: Jan Konecny] #706037
08/24/17 8:38 am
08/24/17 8:38 am
Joined: Jun 2015
Posts: 151
wales uk
R
richiedan40 Offline
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R
Joined: Jun 2015
Posts: 151
wales uk
Whining or wheezing is generally an over tight tappet , I had the left exhaust one a bit tight and gasses were escaping when she got hot. Sounded like an asthmatic ant with heavy shopping , courtesy of mr E Blackadder, ...... sometimes clatter is good.
Oil.............10-40 ! drop that right away matey , its an old engine , you should really be using 20w50


1969 BSA A65 Lightning
1994 moto guzzi California
Triumph sprint GT
1971 BSA B50 Victor special
1968 BSA B44 SS

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