Author Topic: Question about Harley "Bigger Bore" Cylinders.  (Read 1011 times)

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Offline Hreagle

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Question about Harley "Bigger Bore" Cylinders.
« on: Sunday, October 11, 2009. 06:46:29 AM. »
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

Offline rigidthumper

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Re: Question about Harley "Bigger Bore" Cylinders.
« Reply #1 on: Sunday, October 11, 2009. 07:06:11 AM. »
The oring cut for the 110 cylinder bases renders the gasket used for the 113 cylinder base useless.
HTH
Robin
Another day in paradise, with an inch or three of ice on the roads

Offline Hreagle

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Re: Question about Harley "Bigger Bore" Cylinders.
« Reply #2 on: Sunday, October 11, 2009. 07:10:44 AM. »
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

Offline TXCHOP

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Re: Question about Harley "Bigger Bore" Cylinders.
« Reply #3 on: Sunday, October 11, 2009. 07:29:03 AM. »
4.125's use a base gasket, no oring...axtells anyway.

Offline xzo124

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Re: Question about Harley "Bigger Bore" Cylinders.
« Reply #4 on: Sunday, October 11, 2009. 08:27:01 AM. »
S&S use base gasket also....xzo

Offline Scurvy

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Re: Question about Harley "Bigger Bore" Cylinders.
« Reply #5 on: Sunday, October 11, 2009. 08:57:40 AM. »
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?
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Offline Jeffd

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Re: Question about Harley "Bigger Bore" Cylinders.
« Reply #6 on: Sunday, October 11, 2009. 09:19:48 AM. »
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
« Last Edit: Sunday, October 11, 2009. 09:23:14 AM. by Jeffd »

Offline Clintster

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Re: Question about Harley "Bigger Bore" Cylinders.
« Reply #7 on: Sunday, October 11, 2009. 09:36:49 AM. »
Thanks Jeff that one is going in Favorites !
Drive fast, take chances

Offline happyman

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Re: Question about Harley "Bigger Bore" Cylinders.
« Reply #8 on: Sunday, October 11, 2009. 10:21:22 AM. »
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