Pulled head and found 1 oily combustion chamber

I'd do some light lapping and inspect the contact pattern and compare to what the FSM specs. If everything checks out then you shouldn't have to do anything more with the head other than cleaning and new valve stem seals.

I'd pull the cylinder for sure and replace the base gasket and all seals. OEM gaskets of course.

Dirtyhands wrote:

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Depending on how long you plan to run this engine, you could clean up the head and just lap the valves. It looks to me that this one could use a valve job at this point. It would run either way though...

I'd like to see the valves and seats after a light lapping.
Steve

"Punish the wallet or punish the body" - a quote from forum member Brett recently.

If you got the funds handy, I'd take the head et al to your local machine shop and have them re-do the valves, seats, stems. I had this done recently and it cost me just under $200 but it was a lot of work in my situation due to problem valves, etc.
BUT
It's good peace of mind for later when you're cruising down the road that your head has a clean (re)start on life.

While in the process of removing the wrist pins in the pistons I noticed some blow by and decided to pull em and get new rings. The bore on my cylinders is 66mm. The pistons are marked MTC ALCOA. Do I need to buy a ring set from MTC or Can I use these www.z1enterprises.com/product/KL11-2980 or these www.z1enterprises.com/product/KL11-2980 I'm also having trouble finding the part number for the oil passage o-ring pictured below.

$55? WOW. My Wiseco's are only $12 a set. I don't think they'll work. You need MTC rings.
Steve
www.mtceng.com/index.php/faqs/22-faqs-pi...-piston-rings-i-need

Dirtyhands wrote: While in the process of removing the wrist pins in the pistons I noticed some blow by and decided to pull em and get new rings. The bore on my cylinders is 66mm. The pistons are marked MTC ALCOA. Do I need to buy a ring set from MTC or Can I use these www.z1enterprises.com/product/KL11-2980 or these www.z1enterprises.com/product/KL11-2980 I'm also having trouble finding the part number for the oil passage o-ring pictured below.

It's a good question. I would always use the rings sets made for the pistons in use!

Oh man, they had to be their most expensive line too. $120 for a new set of rings, It stings a bit but I'll be happier in the long run I guess.

That's not bad compared to stock ones at $55 a pop. That's X 4.
Steve

Very true, Thank you for all your help on this Steve. This should keep me busy for a bit. Do you know what that oil channel o ring that goes between the case and jugs is numbered or where I could find a couple?

or can I buy some 15mm viton o-rings in its place

Those are oval O rings. One of our members should be able to help you.
Steve