HELP with 95 inch part numbers

[waterboy]

Hello all - what a great site for information!

A friend of mine just gave me a 95 inch upgrade kit for my Twin Cam. He came to possess this kit as part of a trade when he sold a truck. His intention was to upgrade his glide but after two years I think he realized he was never going to do it. He is thinking of selling the glide and getting a new one so he figured the parts would go with the bike at no charge so I may as well have them since I do intend to go to 95 inches.

I have a couple questions:
These parts may be as much as 4 years old. Would that make a difference?
They appear new but the jugs aren't in their original containers. The powder coat looks fine though. The pistons are in a 1550 box, part number 22661-99a, which appears to be the 10.5:1 pistons. However, the pistons themselves have a 22122-99a part number. Does anyone know if this PN is correct?

I slid a piston into a jug and it looks like a good fit to me so I'm fairly confident this is a good set of parts.

The build I was planning was not going to be a 10.5:1 build so I'm a little hesitant to go that far. Also, I don't want to just throw the parts at the bike since it's too much work to do it again.

The only numbers on the jugs was 869413-99 and a HD1659.

I guess taking these down to a local shop and have them "blessed" would be in order.

Any opinions on what I should do with the parts??? (having been on this site for a while - I'm sure there are lots of opinions

I do plan on going through the heads but just to clean them up. The bike has 50k on it. I'm also running the 203 cam.

Thanks in advance!

[springer-]

I haven't checked your part numbers and will do so when I get home to confirm but if you are correct and it is 10.5:1 pistons then they are forged pistons. If you are not trying to get get over 6200 RPM's and are not going to use boost, then I wouldn't use them. If your cylinders are in good shape, powder coat wise, then in your upgrade I would consider boring them and not using the 1550 jugs in the kit. Ultimately I would probably try to seel the stuff as a kit and just work with what you have. Now if you want to use the cylinders to cosmetically enhance the looks of your engine be cause the old jugs look ratty then keep them.

In your case if given the option, I would use cast pistons and build to suit your driving habits rather than use the kit and build a engine you don't or won't use.

[fijfi]

I did a quick search through the SE catalog, I was unable to find the P/N that you show for both the jugs and the P/N stamped on the piston. I don't have the Parts catalog to see if those are the P/Ns for 1450 pistons and jugs, but they very well maybe.

Wonder if someone already did the 95" kit and those are from the 88"?

[waterboy]

ya, I didn't find the PN's either. I was hoping that maybe the boxes were for the set and the indiviual parts may have a different number.

My orginal intention was to bore my jugs, use 9.something CR and keep the 203 cams. Looking quickley at prices i see the pistions are about $130 (apeice I assume).

I have seen some threads on cast vs forged. I think these SE pistions say what they are but I don't remember what that was.

[springer-]

Originally Posted by waterboy

ya, I didn't find the PN's either. I was hoping that maybe the boxes were for the set and the indiviual parts may have a different number.

My orginal intention was to bore my jugs, use 9.something CR and keep the 203 cams. Looking quickley at prices i see the pistions are about $130 (apeice I assume).

I have seen some threads on cast vs forged. I think these SE pistions say what they are but I don't remember what that was.

For SE Cast pistons, $130 would be for a pair but can be found online at 15-20% off that price. You can keep the 203's but 204's would be better.

I would think selling that kit on eBay would likely fund some of your upgrades. Just an idea.

[waterboy]

Just talked to the guy who gave me the parts and found out that they came from a friend that did his bike some time ago. I trust this guys judgement and when I hear from him I'll have a little better idea of why he choose the parts in the first place. I do know his bike runs very well and I suspect this is just a copy of the kit he put in it. I don't believe he did the work himself as I plan on doing though.

Still, any help with the PN's would be appreciated.

[murphdog]

If you're wondering if the pistons and cylinders are in fact 95", did you measure them? Standard bore 95" is 3.875", 88" is 3.75"
SE 95" flat top pistons are flat topped, either of the high compression pistons are not flat topped.
I looked in catalogs back to 2002 and the only part number I found is the 22661-99A, which is the 10.25 cast pistons. They have a noticable dome.

[springer-]

Originally Posted by waterboy

The pistons are in a 1550 box, part number 22661-99a, which appears to be the 10.5:1 pistons. However, the pistons themselves have a 22122-99a part number. Does anyone know if this PN is correct?

The only numbers on the jugs was 869413-99 and a HD1659.

The 22661-99a is the part number for the 10.25:1 SE Cast Pistons KIT that consists of pistons, rings etc. The part number 22122-99a is likely the part number for a single piston with no rings or anything. The 869413-99 has more digits than what I am used to for a stock HD number but as mentioned you need to just measure them. 3.875 is 95" and 3.750 is 88". To tell if they are new look for head gasket material on head gasket surface.

To confirm the pistons first check to see if they are flattops or have a raised center popup. If they have a popup in the center you will notice that the top of the popup surface is a machined finish. If the rest of the top of the piston has a rougher cast looking finish, then they are 10.25:1 SE Cast pistons. If the rest of the top of the piston has machined finish it is a forged piston and 10.5:1. Both of these options would be for 95".

[fijfi]

Originally Posted by springer-

8.875 is 95" and 8.750 is 88".

I truely hope that you meant 3.875 and 3.750. The largest diesel engine that I have ever worked on had a 8.125" bore.

[cwo2lt]

Originally Posted by fijfi

I truely hope that you meant 3.875 and 3.750. The largest diesel engine that I have ever worked on had a 8.125" bore.

Yep! With 12 cylinders and 24 pistons.

[springer-]

It was late, I was tired, football was on, the room was dark, 3's and 8's look alike.

And whats wrong with a BIG bore anyways?

[waterboy]

hey - without my glasses 3's and 8's are the same thing - just depends on what you want to do with it!

I spoke to my friend that gave the parts to the buddy who gave them to me. A friend of his bought them to do the upgrade and never got around to it. Their SE parts from the dealer. The pistons are cast and the jugs are new. We both agreed that it would be wise to take them down to the dealer and have them trace the indivual PN's just to make sure. If everything checks out I'll be start the upgrade. I plan on keeping the 203 in the bike for a while to see how it runs. If I have to change perhaps the 204 is in order. I'll let my tuner help me make that decision once we get it on the dyno.

Springer, thanks for all your help and patients. I'll post to this thread once I make it to the dealer and hopefully their parts system will nail down any remaining mysteries.

I do want to go though the heads while it's apart. NRHS wants $550. I'll be using the search function to see where you guys are at on headwork. Since the bike has 50k on it I also plan on changing out the lifters.

[fijfi]

Originally Posted by springer-

It was late, I was tired, football was on, the room was dark, 3's and 8's look alike.

And whats wrong with a BIG bore anyways?

Nothing at all!

Originally Posted by cwo2lt

Yep! With 12 cylinders and 24 pistons.

Most definately. Go Big or go home. Still the best cutter that I've been on. We definately worked hard...........but played hard also