Author Topic: Question about Harley "Bigger Bore" Cylinders.  (Read 1329 times)

0 Members and 1 Guest are viewing this topic.

Offline Hreagle

  • Full Member
  • Posts: 170
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

  • Site Supporter
  • Full Member
  • *****
  • Posts: 2552
  • Country: us
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
One can only take being shot at so many times, before ducking involuntarily.

Offline Hreagle

  • Full Member
  • Posts: 170
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

  • Full Member
  • Posts: 1501
    • Dan's MC Shop
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

  • Full Member
  • Posts: 735
  • Country: 00
  • 2001 FLHTC T-MAN 125.5"
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

  • Full Member
  • Posts: 745
  • Country: 00
  • Bleh
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
Clinton, MT

Offline Jeffd

  • Full Member
  • Posts: 6457
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

  • Full Member
  • Posts: 1482
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

  • Full Member
  • Posts: 1331
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