cylinder boring

Reply Subscribe

Thread Tools

Search this Thread

Dec 15, 2020 | 11:28 AM

gray horse

Thread Starter

Intermediate

Joined: Jan 2017

Posts: 36

Likes: 1

From: Illinois

cylinder boring

I have a '16 SGS with the 103 and am thinking of going to 107. I have a set of 96" cylinders from my 08 that I put a big bore kit in. Can I bore these out to 3.937 and fit them on this motor? Also, I know it's a bit of a stretch but can they be bored to 4"? Just curious.

Thanks in advance.

Dec 15, 2020 | 11:32 AM

eighteight

Seasoned HDF Member

Joined: Oct 2019

Posts: 10,668

Likes: 7,259

From: OH

96 can be bored to 3.937 ( spigots are approx. .060 thick afterwards)
Not to 4" ( see above)

Dec 15, 2020 | 02:40 PM

gray horse

Thread Starter

Intermediate

Joined: Jan 2017

Posts: 36

Likes: 1

From: Illinois

Thanks for the reply. I figured the 4" was out of the question.

Dec 16, 2020 | 06:13 AM

prodrag1320

Banned

Joined: Sep 2009

Posts: 3,569

Likes: 624

From: deland,florida

107 is the limit,and even there make sure their bored correctly.we`ve seen quite a few over the years bored off center on who knows what.

Dec 16, 2020 | 06:27 AM

Hillsidecycle.com

Sponsor

Joined: Dec 2007

Posts: 12,084

Likes: 829

107" is as large as you can go safely.
We were one of the very first shops in the country to begin boring to the 3.937" bore diameter back in 2006.
We have dedicated kits(#HMM0170) with complete Cometic top end gasket sets, with boring for still only $675.00.
Scott