Squish will be too tight without the base gasket on these without some machining.
I'll have to check my notes to confirm this. I was thinking the opposite.
That’s a given. Point was there is saws out there that come with a decent squish from the factory and deleting the base gasket isn’t even an option unless doing machine work. If multiple people come on here with first hand experience and say you’ll need a gasket on that saw I would believe them.Anyone doing a base gasket delete should always measure their squish. Regardless of what someone's "notes" say.
You are correct. Only difference in the mufflers externally is the brace that connects the muffler to the case. You could have bought the 7901 top end and not had to swap the top covers. Last time I bought one it was the 7901 cylinder with the 7910 piston which is better. The 7910 is setup for the SLR muffler. Some funky setup where the muffler actually goes into the exhaust port.
The older ones are only .013” out on the edge of the bandOn the older side decomp 79cc top end no gasket squish was .024". On the newer top end with the top decomp and stepped exhaust port no gasket left a squish of .013".
The older ones are only .013” out on the edge of the band
Tight to the edge, they are. But the rest is about .020” or soThat's not what I measured last time around.
You're fine
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