Panhead Cylinders

[indianut]

Someone brought me a panhead cylinder that a wrist pin cut 2 deep grooves into. I measured it as best I could and determined that it should clean up at .070. I CAREFULLY set it up on my Boring Bar to leave .005 for Honing and bored the cylinder. I watched the bore job with a flashlight and realized that .070 was going to be perfect as the deepest groove was still barely visible and would be gone after honing. When I removed the cylinder from my Kwik-Way I saw that it had bored THROUGH to the Oil Feed passage!! Why would this have happened at .070? I have taken Pan cylinders to this size before. Is it just a Freak cyl. with core shift? Has anyone seen this with a Pan cyl. at .070? Thanks

[Cotten]

Indianut!

If the top and bottom spigots are still relatively concentric to the bore, I would not hesitate to blame Harley-Davidson.

....Cotten

[JOHNSON]

CAN'T HELP you on that,just curious if it's ross pan cylinder? he had some probs when he was here in Oregon last summer.but i new he made it home OK...with respect.....JR

[indianut]

I measured the spigots, top and bottom, and they were within .005 all the way around.
JR. No, not Ross's cyls. But I am doing a Sport Scout for Kid right now.

[Cotten]

I measured the spigots, top and bottom, and they were within .005 all the way around.

Indianut!

At that overbore, that's closer than relatively.

It's below the ring travel we hope?
If so, maybe you can slip a steel tube up the gallery?
It wouldn't matter if it sealed well at all.

A press-fit would distort the bore, so do it before you plate'n'hone.

....Cotten