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[North Star]

In a 110, would those pistons make it a 113 ci?

[North Star]

Also is there any downside to doing these or are the walls plenty thick enough?

[Doc 1]

In a 110, would those pistons make it a 113 ci?

This is a trick question ....right?

[North Star]

No why? Dumb question?

[grc]

4.375" stroke, 4.000" bore, 2 cylinders, equals 109.96 in³  (stock)

4.375" stroke, 4.010" bore, 2 cylinders, equals 110.51 in³

4.375" stroke, 4.060' bore, 2 cylinders, equals 113.28 in³

Jerry

[Doc 1]

No why? Dumb question?

No not at all.....I just thought you were playing or goofing around....sorry.
You'll have to bore your cases for the 4.060 cylinders to fit.
Doc

[HILLSIDECYCLE.COM]

Also is there any downside to doing these or are the walls plenty thick enough?

We've bored those 110"ers to 113" about 1/2 dozen times now.
No issues.
BTW, going to 113" requires a bore size of 4.060", with the 4.375" arm.
We liked the way S&S configured their 113"er with a 4.500" stroke, and a 4" hole.
Real strong engine right there.
Scott

[DCFIREMANN]

Scott keeping the bore at 4.000 and adding a new 4.5000 S&S crank assy sounds like it would be the way to go. Do the timken conversion and you are set to go. Have you done any 110 conversions like this yet?

This might just be on my to do list!!!!! Looks like a change might be in the air!!!!!

Be Safe

THE DAWG

[North Star]

Reason I ask is that due to the condition of my cylinders, my builder originally wanted to bore out the cylinders and use HD .005 over pistons, but apparently they are hard to come by nowadays.

So now he says he will use the .010 over HD pistons, so I offered to get them since I can get parts cheaper from the US.

I was just curious if this means I will have a 113 engine.

I'm going to check around for the parts tomorrow- my usual 20% off dealer doesn't have them in stock. I was told the part number I need is 22290-07, which apparently are not SE pistons, but stock compression flat tops.

[grc]

Reason I ask is that due to the condition of my cylinders, my builder originally wanted to bore out the cylinders and use HD .005 over pistons, but apparently they are hard to come by nowadays.

So now he says he will use the .010 over HD pistons, so I offered to get them since I can get parts cheaper from the US.

I was just curious if this means I will have a 113 engine.

I'm going to check around for the parts tomorrow- my usual 20% off dealer doesn't have them in stock. I was told the part number I need is 22290-07, which apparently are not SE pistons, but stock compression flat tops.

That is correct, the 22290-07 is the standard compression CVO110 piston in .010" oversize.

22290-07 PISTON & RINGS ASSEMBLY w/ piston pin & lock rings - 0.010 in. O.S. | PV

Jerry

[North Star]

Thanks Jerry. How come the SE ad you posted above mentions needing a new crank? I realize those are different pistons than what I'm after, but I was just wondering.

[HILLSIDECYCLE.COM]

Scott keeping the bore at 4.000 and adding a new 4.5000 S&S crank assy sounds like it would be the way to go. Do the timken conversion and you are set to go. Have you done any 110 conversions like this yet?

This might just be on my to do list!!!!! Looks like a change might be in the air!!!!!

Be Safe

THE DAWG

Have not flipped those around like that............yet.
Scott

[grc]

Thanks Jerry. How come the SE ad you posted above mentions needing a new crank? I realize those are different pistons than what I'm after, but I was just wondering.

That comment is for the TC88's that came with a shorter stroke.  The CVO103's were the first to come with the 4.375" "stroker" crank, and that is the stock crank since they went to the TC96/TC103/CVO110.

Jerry

[sadunbar]

Scott keeping the bore at 4.000 and adding a new 4.5000 S&S crank assy sounds like it would be the way to go. Do the timken conversion and you are set to go. Have you done any 110 conversions like this yet?

This might just be on my to do list!!!!! Looks like a change might be in the air!!!!!

Be Safe

THE DAWG

Shorter stroke, larger bore adds longevity!  A good combination...   

[Twolanerider]

Shorter stroke, larger bore adds longevity!  A good combination...   

Other benefits too.  I'd rarely be drunk enough to go to all the trouble and expense of R&R, splitting cases and boring to gain just a very few cubic inches.  I'd be far more likely to consider it as part of the dual gain of adding a few cubic inches and losing the crappy stock crank if no other significant machine labor was involved.