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#558698 - 08/17/14 10:29 am BSA B33 500cc 1.949. Correct engine oil.  
Joined: Dec 2013
Posts: 19
Jordimll Offline
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Jordimll  Offline
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Joined: Dec 2013
Posts: 19
Barcelona, Spain
Good afternoon every body.

I am ending the restoration of my BSA B33 of 1.949 and I would like to know what Kind of oil I must to use. I think use 20w50, however I don't know I'd it is correct.

I would like to know too what oil you recommend for fork, gearbox, primari case...

Thanks you very much for your help.

Saudos

Jordi


http://bsab33.blogspot.com.es/
http://montesaimpala175.blogspot.com.es/

Montesa Impala 175 Sport 1963
Montesa Impala 175 Comando 1966
Montesa Impala 24h Montjuic - Replica 1963
BSA B33 1949
Ducati Monster 900ie 2001
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#558705 - 08/17/14 11:16 am Re: BSA B33 500cc 1.949. Correct engine oil. [Re: Jordimll]  
Joined: Dec 2003
Posts: 351
Per B Offline
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Per B  Offline
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Posts: 351
Oslo Norway
I am using straight 50 in my singles for the summer, I cange to 20/50 for the winter on the scrambler. (sub zero temperatures) For you in the hot Spain staright 50 should be correct.


best regards

Per
Goldi Clubmans
Goldi Scrambler
Rob North R3
OIF A65
#558723 - 08/17/14 2:18 pm Re: BSA B33 500cc 1.949. Correct engine oil. [Re: Jordimll]  
Joined: Dec 2013
Posts: 19
Jordimll Offline
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Jordimll  Offline
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Joined: Dec 2013
Posts: 19
Barcelona, Spain
Thank you very much for your answer Per B.

What kind of oil do you use for gearbox, primari transmission, fork...

Thanks again


http://bsab33.blogspot.com.es/
http://montesaimpala175.blogspot.com.es/

Montesa Impala 175 Sport 1963
Montesa Impala 175 Comando 1966
Montesa Impala 24h Montjuic - Replica 1963
BSA B33 1949
Ducati Monster 900ie 2001
#558776 - 08/17/14 9:28 pm Re: BSA B33 500cc 1.949. Correct engine oil. [Re: Jordimll]  
Joined: Jan 2009
Posts: 183
Salty Dog Offline
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Salty Dog  Offline
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Posts: 183
Vancouver Island Canada
Hola Jordi

I use the same as Per for my 1954 B33 for the engine....50W
In the primary I use 10/30 or 10/40W engine oil...just enough to splash the chain.
In the gearbox I use Castrol 80W 90 gear oil
In the forks I have SAE 20 fork oil

Had the pleasure of working in Catalonia for 6 months a few years ago...I sure miss it

Saludos

S


Keep It Greasy
#558787 - 08/18/14 12:29 am Re: BSA B33 500cc 1.949. Correct engine oil. [Re: Jordimll]  
Joined: Dec 2013
Posts: 19
Jordimll Offline
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Jordimll  Offline
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Joined: Dec 2013
Posts: 19
Barcelona, Spain
Thank you very much Salty Dog!

Do you know the capacity oil?

If you come back to Catalonia, let me know! Will be a pleasure to ride my old motorbikes with you!

Saludos

Jordi


http://bsab33.blogspot.com.es/
http://montesaimpala175.blogspot.com.es/

Montesa Impala 175 Sport 1963
Montesa Impala 175 Comando 1966
Montesa Impala 24h Montjuic - Replica 1963
BSA B33 1949
Ducati Monster 900ie 2001
#558794 - 08/18/14 4:39 am Re: BSA B33 500cc 1.949. Correct engine oil. [Re: Jordimll]  
Joined: Dec 2003
Posts: 351
Per B Offline
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Per B  Offline
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Joined: Dec 2003
Posts: 351
Oslo Norway
As far as I remember from the top of my head the first forks shall have about 1,9dl of oil each leg later they went up to 2,1 dl I believe, In my opinion SAE20 is to thin for the fork, I would use SAE 30 unless the fork has been modified with Dow type damper, then I go for SAE 20 oil.


best regards

Per
Goldi Clubmans
Goldi Scrambler
Rob North R3
OIF A65
#558795 - 08/18/14 4:56 am Re: BSA B33 500cc 1.949. Correct engine oil. [Re: Salty Dog]  
Joined: May 2009
Posts: 76
MattL Offline
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MattL  Offline
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Posts: 76
Australia
Jordi,
For gearbox oil use the same oil that you use for the engine oil.
The bronze bushes in these early model gearboxes do not like gear oil.

#558821 - 08/18/14 9:40 am Re: BSA B33 500cc 1.949. Correct engine oil. [Re: Jordimll]  
Joined: Dec 2013
Posts: 19
Jordimll Offline
BritBike Forum member
Jordimll  Offline
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Joined: Dec 2013
Posts: 19
Barcelona, Spain
Thanks!

I use API GL4 for my gearboxes of Montesa Impala, I think will use the same oil.

Question, how you check the correct level of gearbox and primary case? Through inspection cap up to oil overflow?

Thanks again!

Jordi


http://bsab33.blogspot.com.es/
http://montesaimpala175.blogspot.com.es/

Montesa Impala 175 Sport 1963
Montesa Impala 175 Comando 1966
Montesa Impala 24h Montjuic - Replica 1963
BSA B33 1949
Ducati Monster 900ie 2001
#558947 - 08/19/14 2:30 am Re: BSA B33 500cc 1.949. Correct engine oil. [Re: Jordimll]  
Joined: May 2009
Posts: 76
MattL Offline
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MattL  Offline
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Joined: May 2009
Posts: 76
Australia
For the gearbox, with the bike on the centre stand fill the gearbox to the bottom of the oil filler plug hole (the big round plug in the centre of the outer cover). Inspect oil level often and keep it topped up.

For the primary case just use enough oil so that the chain just dips into the oil bath.
The clutch is essentially a dry clutch, the oil is there to lubricate the cush drive, clutch bearing and chain, it also acts to keep the chain cool.

#559055 - 08/19/14 6:58 pm Re: BSA B33 500cc 1.949. Correct engine oil. [Re: MattL]  
Joined: Aug 2013
Posts: 495
downhere Offline
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downhere  Offline
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Australia
Originally Posted By: MattL
Jordi,
For gearbox oil use the same oil that you use for the engine oil.
The bronze bushes in these early model gearboxes do not like gear oil.
If that was true every car gearbox with bronze synchro rings would be knackered!

#559076 - 08/19/14 10:26 pm Re: BSA B33 500cc 1.949. Correct engine oil. [Re: Jordimll]  
Joined: May 2004
Posts: 3,548
BSA_WM20 Online content
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BSA_WM20  Online Content
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Posts: 3,548
Sydney Australia
Originally Posted By: Jordimll
Good afternoon every body.

I am ending the restoration of my BSA B33 of 1.949 and I would like to know what Kind of oil I must to use. I think use 20w50, however I don't know I'd it is correct.

I would like to know too what oil you recommend for fork, gearbox, primari case...

Thanks you very much for your help.

Saudos

Jordi


The correct oil is whatever you put in last week and are going to replace next week.
The grade is not particularly important as the engine is nearly all balls & rollers.
Any oil bought from a supermarket today will be better than what was available when your bike was new.
New oils tend to be low zinc these days so any oil that is designed for air cooled engines is even better .
What is important is how long the oil is in there,
You can not change it too much and the more the better.
we have had members who virtually changed their oil every time they used their bikes and they got unbelievable life from their bottom ends and when they had enough "old" oil stored up they used this to change the oil in the F 100.

Thye actual weight of the oil used will be dependant upon where you live and how you ride and what is available from your local service stations as you will be topping up if you go on long rides and not all oils are compatible .
FWIW I used Valvoline 20w 50 in the bikes ( & every thing else ) till I bought a 44 of local 20w50.

With a new bike it can be beneficial to use different coloured oils in each part of the engine as it makes tracing oil leaks a lot easier if they are all different colours .


Bike Beesa
Trevor
#559105 - 08/20/14 5:30 am Re: BSA B33 500cc 1.949. Correct engine oil. [Re: downhere]  
Joined: May 2009
Posts: 76
MattL Offline
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MattL  Offline
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Posts: 76
Australia
Originally Posted By: downhere
[/quote] If that was true every car gearbox with bronze synchro rings would be knackered!


I'm no expert on car gearboxes but I thought syncro rings were brass?

#559199 - 08/20/14 6:13 pm Re: BSA B33 500cc 1.949. Correct engine oil. [Re: Jordimll]  
Joined: Aug 2013
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downhere Offline
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downhere  Offline
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Australia
Now you're being pedantic.

#559375 - 08/21/14 6:27 pm Re: BSA B33 500cc 1.949. Correct engine oil. [Re: Jordimll]  
Joined: Oct 2007
Posts: 1,512
Ignoramus Online content
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Ignoramus  Online Content
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Auckland NZ
The only oil I really would avoid in the big singles are the modern synthetic types. Especially the really light weight ones 15/40 ect ... don't go there

if you can get straight sae 50 that would be great in a hot climate


"There's the way it ought to be and there's the way it is" (Sgt Barnes)
#559382 - 08/21/14 7:04 pm Re: BSA B33 500cc 1.949. Correct engine oil. [Re: downhere]  
Joined: Aug 2001
Posts: 6,904
triton thrasher Online content
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triton thrasher  Online Content
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scotland
Originally Posted By: downhere
Now you're being pedantic.


Bronze is an alloy of copper and tin.

Brass is an alloy of copper and zinc.


Amateur Loctite enthusiast.
#559383 - 08/21/14 7:05 pm Re: BSA B33 500cc 1.949. Correct engine oil. [Re: Ignoramus]  
Joined: Aug 2001
Posts: 6,904
triton thrasher Online content
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scotland
Originally Posted By: Ignoramus
The only oil I really would avoid in the big singles are the modern synthetic types.


Why?


Amateur Loctite enthusiast.
#559437 - 08/21/14 11:37 pm Re: BSA B33 500cc 1.949. Correct engine oil. [Re: MattL]  
Joined: May 2004
Posts: 3,548
BSA_WM20 Online content
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BSA_WM20  Online Content
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Posts: 3,548
Sydney Australia
Originally Posted By: MattL
Originally Posted By: downhere
If that was true every car gearbox with bronze synchro rings would be knackered!


I'm no expert on car gearboxes but I thought syncro rings were brass? [/quote]

Yes Syncro gears are bronze and most of the are powder pressings to boot.
Early gearbox oils used sulphur compounds that chemically attacked the ntergranular Beta phase.
For a long while gear oils used to be labled "syncro safe" if they did not have sulphur in them and these can be used in BSA boxes.
Now days so I have been told all car gear oils are syncro safe so it has been dropped from the lable however a lot of truck oils still use the sulphur compounds.


Bike Beesa
Trevor

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