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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.

[HILLSIDECYCLE.COM]

I do not drink........

[North Star]

This is now a moot point- I had a dealer check inventory, and there are 3 .010 over piston sets (as in 3 pistons- 1 per pkg) in all of North America. They are backordered until June 28 with a status "Re-Sourced", which to me means they are either looking at another piston maker, or it's a sign the 110 is on its way out. The .005 overs are obsolete.

One was in Lousiana- one piston does me no good. The last 2 were at Sacremento HD. Talked to a really great parts guy there, John, who had them in hand, and was all ready to ship them to me, when at the last minute he was told that they were on hold for another shop. Bummer.

Long story short, I checked with a discount HD dealer and was amazed to find new cylinders ARE ONLY $115 each! (PN 17454-08A). Dealer has to order them in, but at least they aren't backordered.

So, going with new OEM cylinders and pistons because that's what the builder wants. I mentioned Axtells since they have regular compression forged flat tops, but he wants to stick with the HD stuff- something about weight and heat disapation or something. He also now doesn't like the Gaterman 1023's, so I'm going to exchange them for the 1021's, which are the old HD "b" lifters.

I know I'm going to get negative comments about my builder since he's very anal and traditional with what parts he uses in his package, but I really feel he has a formula for getting these engines to perform they way they should. It really boils down to the fact he said he is the one who is responsible for the build and he has to stand behind his work, so it's best to not compromise what parts I think I need, and trust him to use what he feels comfortable with.

[HD Street Performance]

No negative comments from me, if the pistons are not worn or collapsed and the cylinders are true plus checked for clearance it should work fine.
By the way the USA dealers are very fussy about selling "export", that may have been the issue. Some of the folks that follow that stuff can fill you in I am sure, if you are interested. I don't know all the particulars.
FYI you can use SE120r flat tops, 4.060 bore, if going to 113, cylinder tops need to be taken down a small amount and if done properly it is a handy way to get 0 deck height and maximum squish

[North Star]

No, there just is no stock of those pistons- they didnt know where I was calling from, plus I still order parts from a 20% off place since I have a US shipping address.

I ordered the new OEM pistons and cylinders, and I know the builder will still check the clearances, so hopefully it will be fine.

[JKM]

North Star, when you think you have the bike back from Don?  I'm curious as I'm having similar work done by Dynotunes in Burlington.  My heads went to J Precision in Montreal.  I should have the bike back in a couple of weeks and would be curious to compare results

[North Star]

North Star, when you think you have the bike back from Don?  I'm curious as I'm having similar work done by Dynotunes in Burlington.  My heads went to J Precision in Montreal.  I should have the bike back in a couple of weeks and would be curious to compare results

Well, I hope to have the pistons/jugs/lifters by early next week, so he should be done by the end of next week or next weekend. Once I give him those parts, it's just a matter of bolting everything back together and dyno tuning, since by then he will have done the head/TB porting. I'll post up the final sheets on the other thread I started. Stay Tuned (pun intended).

Murphy deals with Bruce at Dynotunes...he has good things to say about him. What is he doing to your bike?

[JKM]

Dynotunes is doing headwork (heads done by J Precision) and also throttle body porting.  Heads will be shaved a little to get 10.2-10.4 compression.  I have the Woods 777 cam with S&S lifters and adjustable pushrods.  While it's in there I'm also having the Progressive 944 shocks on the rear and monotubes on the front.  Also bagger brace installed as I have a 2008 (old frame).

[North Star]

Sounds nice....it will be interesting to compare dyno sheets and also the dollars-for-power factor.

Two years back I had by bike dyno'd at Dynotunes and at Stay Tuned in the same summer- Stay Tuned's dyno showed me at +5 tq vs Dynotunes dyno. Only diff was I switched out Fullsac 2.0's for Rinehart 4" mufflers when I did the later Stay Tuned run. That's not to say the Rineharts are necessarily better for tq, but it means their dynos are probably close as far as being optimistic or not.