What have you done with your bike/s today?

[RogerSB]

I still have my original drain plug and this morning I was very tempted to put it back because I don't remember it dripping oil and I used it many times to check the oil level, but I changed my mind as the one I bought last year was a stainless one from Barleycorn Engineering - and I couldn't believe it wouldn't be right from Barleycorn, so I compared the two and both were identical length. Your right about the Dowty washer John, it is twice as thick as a fibre one. I even considered that but I didn't think a mm would make much difference and, of course, at the time I was only concerned with a drip of oil from the plug and completely unaware of the forthcoming oil level disparity.

At one time I would definitely have removed the chain case just to find out, but with a sidecar attached it's not such a straightforward job anymore and I can't think of another reason for it.

Rog.

[chaterlea25]

Hi Roger and All,
I just went to Google to confirm my thoughts, 100 x 100 mm square x 1mm thick equals 100ml
So imagining the area inside the primary
1mm in level would  make quite a difference 

John

[RogerSB]

Hi John, thanks, you're right  .

Earlier today I was looking at one of my photos where I'd drawn a line indicating where the oil level would be in the chain case. It was from a while back when we were discussing it on here. It's only just above the screw bosses, hardly anything when you see it like that, so with the top of the level tube being that little bit lower it would make quite a difference.

So now I'd better put the 100 ml back!

By-the-way I went for test ride this morning after changing a leaky speedo cable with one from Chronometric Instrument Services and after changing the chain case and fork oil - and happy there's no leaks from the Dowty washer or the new speedo cable - yet!

Rog.

[Greybeard]

I just went to Google to confirm my thoughts, 100 x 100 mm square x 1mm thick equals 100ml

How lovely is the Metric system? If using water you can measure volume and straight away know the weight. 1ltr of water weighs a nominal 1kg*. Not so easy with the Imperial system;  try working out the weight of x gallons given the size of the container.

*If I've misremembered this I'm sure one of my fans will come along and put me straight. 😁

[RDfella]

Virtually all the mistakes I've ever made when machining (metal or wood) has been when using metric. So easy to mistake 1.02 for 120 etc

[groily]

Well  . . . a gallon of (edit - British!) water always weighed 10lbs GB (subject to the same temperature variations as would make the litre / kg thing go wrong).

But water, being a dilutant and thus a menace to pure blood, I don't need to measure it much.
Oil, whisk(+ 'e' for our Irish friends)y, wine and beer - that's the equiv of the ol' puppy dogs' tails li'l boys are made of  . . .

Not to mention the need for 21 tooth gears to make my Myford cut metric, or almost! (Why isn't 254 a more friendly number, please Mr Napoleon?)

[Beeza]

Hi Roger and All,
I just went to Google to confirm my thoughts, 100 x 100 mm square x 1mm thick equals 100ml
So imagining the area inside the primary
1mm in level would  make quite a difference 

John

More like 10ml

[muskrat]

G'day Fellas.
Beg to differ. 100mmx100mm = 10,000 sq mm x 1mm = 10,000 cu mm. 1 ml = 1,000 cu mm (1 ml= 1 cubic centimeter) so = 10 ml I think, early Sunday morning hangover math
Cheers

[Beeza]

G'day Fellas.
Beg to differ. 100mmx100mm = 10,000 sq mm x 1mm = 10,000 cu mm. 1 ml = 1,000 cu mm (1 ml= 1 cubic centimeter) so = 10 ml I think, early Sunday morning hangover math
Cheers

I’ve already got you there Musky, look above, however for those not with the metric system.
4“(100mm) X 4“ X 40thou (0.040 inch = 1mm) =3.5 oz
3.5 imp fluid oz = 10 millilitres = 2 teaspoons

[muskrat]

G'day Beeza.
Google says 3.5 fluid oz = 103 ml. more like 0.35 fluid oz. 
You drinking again
Cheers

[Colsbeeza]

Some time ago, after replacing the chaincase, I put oil in the chaincase and drained it completely via the overflow.
I then removed the outer chaincase with gasket attached to the outer chaincase and got an extra 40mls of oil retained in the chaincase, trapped behind the gasket and behind the screw protrusions.
So volume you think you have in the chaincase depends on whether you are are simply draining and refilling, or removing the chaincase to do clutch work and then refilling. Some gaskets are wider than others unless you make your own, so that also should be considered.
Col

[RogerSB]

  Well I've put it back anyway 
Rog.

[Joolstacho]

I dunno about anyone else, but really, why would you be worried about a precise measure of CC oil?
The whole thing is running in an 'oil-mist' anyway. Even if it's pretty low the chain will be throwing up enough to keep the chain lubricated.
Don't you think?

[RogerSB]

But a 100 c.c. is a whole 100 ml. 
Rog.

[groily]

I dunno about anyone else, but really, why would you be worried about a precise measure of CC oil?
The whole thing is running in an 'oil-mist' anyway. Even if it's pretty low the chain will be throwing up enough to keep the chain lubricated.
Don't you think?

Is what I think too, have to say. Chain bottom run just kissing the slime, verified visually, is all I've ever done, however many cc or fluid oz that might actually be. Then check periodically depending on, um, the size of any oil painting on the floor.