1100 Katana with GS 1150 bottom end smoking oil

[John Kat]

After almost 8 years with little to no riding, I started riding my 1100 Kat again.
The bike runs perfectly with a very good idle but blue smoke comes out of one of the exhausts when accelerating hard...
I suppose that at least one the cylinders and piston rings might be worn?
I suspect the bike had been used for drag racing before I bought it as the bottom end comes from an 1150?
The cylinder head however is from an 1100?
Is there any special reasons for this?
I hope the bore is still at 74 mm so that I can use a Wiseco 1299 kit.
Any advice?

[Brendan W]

If the bike has sat, you could be looking at a sticky ring instead and a few more miles and/or some of the various treatments for stuck rings could see you good.

[John Kat]

If the bike has sat, you could be looking at a sticky ring instead and a few more miles and/or some of the various treatments for stuck rings could see you good.

Good advice!
Is it something I have to add to the engine oil?

[Brendan W]

I've only done it a few times and added a home brew of kerosene/atf/acetone directly to the cylinder through the plughole and left overnight.
There are proprietary additives but I don't know what instructions they give.
You could pull the plugs and see if one is oily - generally a dead give away.

[John Kat]

I've only done it a few times and added a home brew of kerosene/atf/acetone directly to the cylinder through the plughole and left overnight.
There are proprietary additives but I don't know what instructions they give.
You could pull the plugs and see if one is oily - generally a dead give away.

Thanks, so no Irish whisky?

[Brendan W]

Thanks, so no Irish whisky?

I imagine if you drank enough of it the smoke would disappear, until tomorrow at least

[GregT]

It could simply be a valve stem seal lifted off the guide. They tend to dry out and bond to the stem when they're left long enough.

[John Kat]

It could simply be a valve stem seal lifted off the guide. They tend to dry out and bond to the stem when they're left long enough.

Right, but changing them will require lifting the cylinder head...
I will have a look first.

[Brendan W]

If it is a stem seal it's probably an exhaust. If it's an exhaust you can drop the headers and have a look in the ports to see which is oily.
If it comes to that there are ways to keep your head on and replace stem seals. Packing the cylinder with cord for one. But that's for another day.

[John Kat]

If it is a stem seal it's probably an exhaust. If it's an exhaust you can drop the headers and have a look in the ports to see which is oily.
If it comes to that there are ways to keep your head on and replace stem seals. Packing the cylinder with cord for one. But that's for another day.

I understand how you would go about doing that.
Beeing a 16 valve engine doubles the chances of having a problem with the stem seals I suppose...