A funny thing happened in the garage today

[GonzoB]

The Breva has just about clocked up 10,000km, and so I decided it was time to change all the oils this weekend.

Nothing funny there.

I did the engine, gearbox, forks. Nope, not funny.

Then it was time this morning to drain the rear drive. It was quite cold at 8am. I opened the drain plug and the oil drizzled out. "Hmm", said I, and went and got the hot air gun. I set it on 150C and gently warmed the drive casing. After a while the oil started flowing better, so I stopped heating. Laughing yet?

So then I had a look at the drive housing. I saw this:





Oh no! You idiot! You've put too much heat on it and cracked the casing. No No NO!!

Then I had a REALLY GOOD EXTRA CLOSE look, and ........ it's a casting mark. The photo above has the light coming from the high-side of the "crack" and it looks about 2mm wide. Then, just to be sure, I went and looked at some photos I took when I bought the bike. Yes, the mark is there.

Be still my heart....

Enjoy the laugh?

Gonzo

[oldbike54]

 You are not the first CARC bike owner to be panicked by that casting mark 

 Dusty

[Muzz]

You are not the first CARC bike owner to be panicked by that casting mark 

 Dusty

I think it might be a smallblock Dusty.  And yes, you are certainly not the first one to do the big freak-out.

[twodogs]

Ha I know that feeling all to well and the feeling of relief that came after I put the biggest magnifying glass I had on it to find what you found, I'm still working on better lightning for the garage 

[Motormike]

It had me fooled. 

[Ncdan]

Ok I’m confused. So that crack is not actually a crack but a mark made by a sharpie type pin?

[twodogs]

No it's a cast lip that was not smoothed out at the factory, in certain light it will fool you into thinking it is cracked.

[SIR REAL ED]

The Breva has just about clocked up 10,000km, and so I decided it was time to change all the oils this weekend.

Nothing funny there.

I did the engine, gearbox, forks. Nope, not funny.

Then it was time this morning to drain the rear drive. It was quite cold at 8am. I opened the drain plug and the oil drizzled out. "Hmm", said I, and went and got the hot air gun. I set it on 150C and gently warmed the drive casing. After a while the oil started flowing better, so I stopped heating. Laughing yet?

So then I had a look at the drive housing. I saw this:





Oh no! You idiot! You've put too much heat on it and cracked the casing. No No NO!!

Then I had a REALLY GOOD EXTRA CLOSE look, and ........ it's a casting mark. The photo above has the light coming from the high-side of the "crack" and it looks about 2mm wide. Then, just to be sure, I went and looked at some photos I took when I bought the bike. Yes, the mark is there.

Be still my heart....

Enjoy the laugh?

Gonzo

Thats why you should never keep a loaded firearm in your toolbox next to the heat gun!

With that type of default, instantaneous, reflexive, "I'm an idiot!" self-flagellation, I think we may have had the same father.

Are you Catholic or Jesuit?

I would suggest getting a Sharpie and writing "Calm down Dummy!  This is not a crack!" on the final drive housing.  Cause if you are like me, in about a year or so........

[Ncdan]

No it's a cast lip that was not smoothed out at the factory, in certain light it will fool you into thinking it is cracked.

Got it, thanks👍

[tazio]

That's nuts, I too would have freaked out!
Reminds of a looong time ago I got a hairbrush across my ass by my mom.
She thought I had cracked the television tube horsing around in the house.
....it turned out to be a strand of that Christmas Tinsel stuff !!! 

[John A]

that is funny, I cant tell you the number of times it has happened especially during aviation maintenance where I'm looking in dark greasy dirty places in the bowels of an aircraft that shouldn't be looked at even by normal people. Then with dye check, they can still fool you.