HarleyTechTalk

Suburban are advertising a piston and barrel kit increasing a 107 to 120 cubes. Has anyone had the pleasure??

Quote from: Sunny Jim on July 23, 2017, 07:54:15 AM
Suburban are advertising a piston and barrel kit increasing a 107 to 120 cubes. Has anyone had the pleasure??

you need a stroker kit for it too if I  am thinking correct. plus a larger piston than the 117 cvo has . you can go 124"

Nope, no stroker kit needed. I called Fuel Moto about their 120" kit. They will bore your stock 107" cylinders to a 117" and supply new cylinders with cast iron liners for their 120". I was told their 120" kit had thicker cylinder walls than the 107" Twincams. 

Quote from: BigT on July 23, 2017, 03:49:48 PM
Nope, no stroker kit needed. I called Fuel Moto about their 120" kit. They will bore your stock 107" cylinders to a 117" and supply new cylinders with cast iron liners for their 120". I was told their 120" kit had thicker cylinder walls than the 107" Twincams.

interesting

To go 120" you need the SE 114 cylinders from the stage 3 big bore kit, or just order a kit from Fuel Moto, he has the cylinders in stock.

The wall thickness is greater on the Screamin' Eagle 114" cylinders than that of the stock 107 or 114 CVO.

Quote from: Durwood on July 28, 2017, 04:16:53 AM
To go 120" you need the SE 114 cylinders from the stage 3 big bore kit, or just order a kit from Fuel Moto, he has the cylinders in stock.

The wall thickness is greater on the Screamin' Eagle 114" cylinders than that of the stock 107 or 114 CVO.

whos piston? I seen one of these and was not a wild build, but it was respectable.  128hp 138 tq.  hit early good for a bagger.

Quote from: happyman on July 28, 2017, 07:06:36 AM

Quote from: Durwood on July 28, 2017, 04:16:53 AM
To go 120" you need the SE 114 cylinders from the stage 3 big bore kit, or just order a kit from Fuel Moto, he has the cylinders in stock.

The wall thickness is greater on the Screamin' Eagle 114" cylinders than that of the stock 107 or 114 CVO.

whos piston? I seen one of these and was not a wild build, but it was respectable.  128hp 138 tq.  hit early good for a bagger.

I believe Jamie is using CP's and Suburban uses Mahle.

Quote from: Durwood on July 28, 2017, 02:14:36 PM

Quote from: happyman on July 28, 2017, 07:06:36 AM

Quote from: Durwood on July 28, 2017, 04:16:53 AM
To go 120" you need the SE 114 cylinders from the stage 3 big bore kit, or just order a kit from Fuel Moto, he has the cylinders in stock.

The wall thickness is greater on the Screamin' Eagle 114" cylinders than that of the stock 107 or 114 CVO.

whos piston? I seen one of these and was not a wild build, but it was respectable.  128hp 138 tq.  hit early good for a bagger.

I believe Jamie is using CP's and Suburban uses Mahle.

So if we used the same bore  as used on the 107 m8 , on the  CVO we have 124"? Or is it larger  than 124?

Quote from: happyman on July 28, 2017, 02:31:45 PM

Quote from: Durwood on July 28, 2017, 02:14:36 PM

Quote from: happyman on July 28, 2017, 07:06:36 AM

Quote from: Durwood on July 28, 2017, 04:16:53 AM
To go 120" you need the SE 114 cylinders from the stage 3 big bore kit, or just order a kit from Fuel Moto, he has the cylinders in stock.

The wall thickness is greater on the Screamin' Eagle 114" cylinders than that of the stock 107 or 114 CVO.

whos piston? I seen one of these and was not a wild build, but it was respectable.  128hp 138 tq.  hit early good for a bagger.

I believe Jamie is using CP's and Suburban uses Mahle.

So if we used the same bore  as used on the 107 m8 , on the  CVO we have 124"? Or is it larger  than 124?

Correct. Provided they have the pistons for the 4.5" stroke, it would be a 124".

How do these mods stack up against an SE 114 stage 4 kit, given you need to buy extras?

IMO best bang for the buck is buy some 117 CP pistons, bore your stock cylinders, add a good cam & lifters, plus a good tune, should be doable for about 2 grand. MOCO kits have never been as good as the aftermarket as far as producing #s.

Quote from: DTTJGlide on July 29, 2017, 06:44:22 AM
IMO best bang for the buck is buy some 117 CP pistons, bore your stock cylinders, add a good cam & lifters, plus a good tune, should be doable for about 2 grand. MOCO kits have never been as good as the aftermarket as far as producing #s.

want me to get a price on CP Pistons??

Yes Bob. I may have located a spare set of cylinders.

And what about the heads , any thoughts Jimbo

If you can find some 114 take off cylinders you can go to 120"

Quote from: DTTJGlide on July 29, 2017, 07:21:51 PM
If you can find some 114 take off cylinders you can go to 120"

The CVO 114" is the same cylinder as the 107", the big bore cylinders are needed to go 120" as the spigot is thicker than that of the production 114/107.

Quote from: Durwood on July 29, 2017, 07:37:29 PM

Quote from: DTTJGlide on July 29, 2017, 07:21:51 PM
If you can find some 114 take off cylinders you can go to 120"

The CVO 114" is the same cylinder as the 107", the big bore cylinders are needed to go 120" as the spigot is thicker than that of the production 114/107.

I was using info from another forum, but it was given by a well known engine builder, confirm & measure is all I can say,

I just ran across a website offering 124" kits using resleeved cylinders and 4.250 pistons. No case boring needed.

https://www.fuelmotousa.com/p-33975-m8-117-big-bore-kit.html I had this fuel moto kit put on my m8 like it really well 1300 labor from a Harley Dealer.

They also have a 120 kit.