Author Topic: Question about Harley "Bigger Bore" Cylinders.  (Read 1089 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

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?
'05 FXST, '10 FLHTP, '77 FXE
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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