TOPIC:

Are they sending you a new one?
Steve

SWest wrote: Are they sending you a new one?
Steve

Cometic said my supplier needs to take care of it, and resisted assisting any further on the matter.
So I sent another email to Joe...



Update 10/08. Beep-beep-beep, ur-ur-ur, screech~~~uh...pop-boom

MTC says STOP!

Think the piston is the same as mine, forgot to say i also have Ape studs and head nuts.

Street Fighter LTD wrote:

daveo wrote: Cometic Technical Service today put a halt to using either one of these gaskets. Said to "definitely use set having 74mm + bore opening for certain, and this set must have been improperly stamped when manufactured."

So, thank you again Dave for pointing this out. I prefer to err on the side of caution.

I Hate being right to slow you down , Love it to keep your project bulletproof
Keep up the good work
Dave

Oh brother...
Boys and girls, we have a problem here. I would rather ignore it and plunge in, but the respect for getting things right has stopped my progress dead cold.

Fortunately my oil sucking engine is still together, and running better than ever!

Just keep a sharp eye on the oil and ride it until snow time
Dave

Street Fighter LTD wrote: Just keep a sharp eye on the oil and ride it until snow time
Dave

I've spent enough time and cash, and am biting at the bit to get this done. Having to wait for re-engineered and manufactured gaskets does not get it for me.
Double-checked the gasket opening relationship to piston diameter. The OEM Kawasaki gaskets easily fit over, but the Cometic don't...except for only one opening of the four. Hmmm.

SWest wrote: Are they sending you a new one?
Steve

Apparently MTC got a bad batch and are returning their stock to Cometic, and will send me one of the correct size.
Anyone planning to assemble an engine with 2-pc. 74mm Cometic head gaskets should double check the bore measurements.

Sure am glad I caught this, and thanks again Dave A.

Clayed one piston to confirm clearances:

Looks like there might be room for bigger cams too!

That's great. I wonder what the compression ratio is now. Can you show a pic of the cross hatch?
Steve

SWest wrote: That's great. I wonder what the compression ratio is now. Can you show a pic of the cross hatch?
Steve

MTC suggested it may be around 10:1

I'd like to use a grease coated OEM paper cam-cover gasket this time, but not sure what grease would be suitable. I do have some wheel bearing grease on-hand.

Best shot I have of the cross-hatch pattern done by Pit Stop Performance:



Note the marker lines where both head gaskets had to be trimmed to fit around the APE studs, and next to the center galley o-ring instead of on top of it...
a real PITA

Doesn't look any more coarse than I was able to get with the 220 stones. Maybe I'm there after all. I didn't open the gasket where the oil passages are when I put them in. I'll do it this time, maybe open the two rear passages as well.
Looking good.
Steve