Primary Chaincase oil volume

[Roadrocket649]

Can anyone enlighten me please

The Haynes A7/ A10 manual states on Page 10

Recommended Lubricants
Chaincase (Primary)            1/6th pint (95ccs/mls)

Further down the page it states

Routine Maintenance and capacities data
Chaincase               SAE 20 (8 fluid ounces or 225 ccs/ mls)

Since one is less than half the other, can someone please confirm which one it is

The bike in question is a 1958 BSA Super Rocket

Roadrocket649

[a10 gf]

Try the Swingarm instruction manual (top of page 30).

[bikerbob]

HI ther
I have always used 20sae fork oil as I was told it does not emulsify and it is 8fluid ounces.

[Roadrocket649]

Thanks A10gf & Bikerbob

The Swinging arm manual refers to to combined drain plug & level plug

Mine has the level plug as the second allen stud on the lower side of the chain case

The shape of the chaincase in the manual looks bigger, which may be an optical illusion, but does the combined level & drainplug have a greater volume?

Roadrocket649

[a10 gf]

Try this: http://www.a7a10.net/BSA/manual54/im20-21.jpg (from the plunger manual, has swingarm content as well, now mentioned in the Instruction Manuals link post).

[Roadrocket649]

Many Thanks a10gf

Roadrocket649

[beezalex]

I would go with the lower figure as the less oil the clutch sees, the better.  There really only needs to be enough oil in there to splash the chain a little bit.  Does your final drive chain run in an oil bath?

Also, ATF is made for wet clutches.  Less sticking and slipping. wink2

[Hubie]

Just enough so the bottom run of the chain touches the oil.  That will give it plent to chuck around.  I use ATF as well.

Cheers,
Hubie

[A10Boy]

The thing is to avoid the chain running dry. If my maths is correct [doubtful], at 5000 rpm that chain is running at over 1000 ft/sec. it will fry itself after a very short time. Ask me how I know.

EDIT That should be inches/sec DUH.

[muskrat]

G'day Andy,
                working with your math my racer running a dry chain at a 5 lap race and 5 race meeting would travel over 1100 MILES with just a 2 second squirt of lube before each race. Never really thought about it like that. Boy those renold chains are good!!!
Cheers

[bsa-bill]

I have a mate who was advised to just use chain spray on the primary chain, he did try it - just the once, it got extremely hot.
that short chain really motors compared to the rear one, and without any cooling air

[beezalex]

Not to be a smarty pants or anything, but I get:

Engine speed    Engine sprocket dia  Pi(mmm...pi)  in/ft conversion   Min/sec conversion
        |                     |                         |                  |                      |             
5000 rev/min *        3 in              *    3.1419    /     12 in/ft        /    60 sec/mi          =  65 ft/sec

Maybe Renolds chains aren't made of unobtanium...

[Roadrocket649]

Guys

Many thanks for all your comments

The ATF option is something I had not thought about

Interestingly, one of the guys in the WSBSAOC is building a special and has had all the engine parts, wheels hubs , and anything that could be polished so it is like chrome plat - it looks fantastic

He has cut a hole in the primary chainchase to reveal the clutch - as per some ducati's, and intends to just spray the chain with chain oil, instead of using the oil bath

I will certainly share your comments with him

Once again, many thanks everyone for your comments

Roadrocket649

[bikerbob]

Hi there
Could some one please tell me what ATF is please.

[a10 gf]

2 possibilities

http://www.atf.gov/
or
http://www.gtfours.co.uk/what/atf/atf.htm
(some interesting comments about ATF and standard gearoil differences)