What is this?

[new bob]

What is this tab on the top half of my crank case?Is it from when it was cast?I always wanted to know what it was.Thanks.1980 GS1100E

[Detroit Diesel Man]

Thats a tow hook for when you need to pull a yamaha out of the ditch....

[Agemax]

its a pre made mounting point for a turbo

[new bob]

Thats a tow hook for when you need to pull a yamaha out of the ditch....

Now that is pretty good I must say.

[trippivot]

good luck road bell hanger.

[bonanzadave]

Man ! Thats one clean engine.

[new bob]

Man ! Thats one clean engine.

Thanks.I try real hard to keep it clean.(for being thirty years old anyway)

[Guest]

Possibly a place to hold the engine at the factory.

[hampshirehog]

Possibly a place to hold the engine at the factory.

Wins the prize!

[gane]

Thanks.I try real hard to keep it clean.(for being thirty years old anyway)

Chief nailed it.

[ReTread]

It's a security device. You put a padlock through it so no one can steal your crankshaft.

[Steve]

Chief nailed it.

What "Chief"?

Look again, there is no "I" in there, it's "CHEF".

.

[shirazdrum]

It's a security device. You put a padlock through it so no one can steal your crankshaft.

lol, i'm gonna do that. It's hoitsing point, most car engines have it too.

[tejasmud]

In opinion they are points for indicator pins when the cases are machined. They are located on the centerline of the cases, which is most likely the reference datum.

It could be also used for hoisting, but why machine them if that were their only function?

The 700 engine has them too, but not practically located for hoisting.

[gane]

What "Chief"?

Look again, there is no "I" in there, it's "CHEF".

.

Sorry, I have a cold...G