78 or 79 First time owner

[Betteron2]

I concur...that would be wise. No rush here - I've my 79 XS1100 if wind therapy is in order.

 

[Betteron2]

Engine is out of the frame. Getting a shopping list together. So far I have the sump cover gasket (and possibly the MikesXS filter?) Will be able to reuse right side cover gasket. I need to add a gasket that'll go between the lower and main crankcases?

 

[Jim]

No gasket in the case halves... metal to metal with a good sealant.

 

[Betteron2]

Thanks very much - haven't cracked it open yet - wrestling it out of the frame is enough for today...

 

[Airwolfie]

https://www.xs650.com/threads/my-engine-rebuild-from-scratch.30786/

My engine rebuild thread, just check it. Out in reverse for disassembly!

 

[Betteron2]

https://www.xs650.com/threads/my-engine-rebuild-from-scratch.30786/

My engine rebuild thread, just check it. Out in reverse for disassembly!

Thanks very much - I was just puzzling over what needs to come off before splitting the cases and I suspect your thread will be very helpful!

 

[Betteron2]

Anyone see anything I need to remove to be able to spilt the cases? I don't want to be banging on it if something is holding them together besides Yamabond...

 

[Jim]

Some good info here in Tech.

https://www.xs650.com/threads/splitting-the-crankcase.869/page-4

 

[Betteron2]

Thanks for the direction Jim - just hoped extra eyes might see something obviously holding things together.

Edit: This engine had no nut on 16... not essential I guess - I will be replacing it with one all the same though!

 

[Jim]

The "most overlooked" ones are the nut behind the clutch and the two under the sprocket. . Appears that you got them. The rest are pretty obvious.
There's also 4 bolts topside aft.

 

[Betteron2]

Ah ha. 14,15,17 still tight. Hiding 'under there.

Edit: 18 too...

 

[Betteron2]

While the rest of the guts seem in good shape, all tight and nothing wiggling and all spinning smoothly - that first gear needs a replacement. Oddly, nothing else looks out of line. Wonder what happened...

 

[5twins]

Your missing nut #16 holds the shift shaft protector on, along with one of the top bolts in the starter gear cover .....

 

[Betteron2]

Your missing nut #16 holds the shift shaft protector on, along with one of the top bolts in the starter gear cover .....

View attachment 247076

View attachment 247077

View attachment 247078

Ah - thanks!

 

[5twins]

Although the drawing doesn't show it, there's usually a flat washer under the nut as well. I think it spreads the clamping force better on the slotted mount of the shift shaft protector.

 

[Betteron2]

I think I found it - wedged between the outside of a cylinder and a 'wall'. Rusty con rods as well.

 

[5twins]

Well, it's an external part. I don't know how it would get inside the engine. That washer is probably from somewhere else inside the motor.

 

[Betteron2]

Well, it's an external part. I don't know how it would get inside the engine. That washer is probably from somewhere else inside the motor.

Yep. Misidentified until I retrieved it. It's plastic.

 

[Jim]

Rusty con rods as well.

They're copper coated. Looks normal from that fuzzy pic.

 

[Betteron2]

Thank heavens!