Question about Harley "Bigger Bore" Cylinders.

[Hreagle]

Looking through the SE catalog, I see they state that the "Bigger Bore" 4.060" cylinders can't be used on a CVO 110" engine, or on any engine that's been converted to a 110. Just curious here, but does anyone know why this is? Thanks!

Eagle

[rigidthumper]

The oring cut for the 110 cylinder bases renders the gasket used for the 113 cylinder base useless.
HTH
Robin

[Hreagle]

Thanks Robin, I had figured it had to have something to do with how the base was machined but didn't know what. With the even bigger cylinders, like the S&S 4.125" ones, do they use an "O" ring or a base gasket?

Eagle

[TXCHOP]

4.125's use a base gasket, no oring...axtells anyway.

[xzo124]

S&S use base gasket also....xzo

[Scurvy]

If I get my cases bored, but retain the stock 4" crank, does that eliminate H-D and S&S "bigger bore" cylinders and pistons as choices?

[Jeffd]

The oring cut for the 110 cylinder bases renders the gasket used for the 113 cylinder base useless.
HTH
Robin

couldn't you just run a bead of yamabond in the groove?  or actually around the spigot might work better or would it just make a mess LOL.
http://www.nrhsperformance.com/tech_cylinderassembly.shtml

[Clintster]

Thanks Jeff that one is going in Favorites !

[happyman]

Looking through the SE catalog, I see they state that the "Bigger Bore" 4.060" cylinders can't be used on a CVO 110" engine, or on any engine that's been converted to a 110. Just curious here, but does anyone know why this is? Thanks!

Eagle

Jims  makes a cylinder that will work.. you also use the 4.5 crank and you have a 113". seems to work pretty good.
happy