If I am remebering this wrong, I'm sure I will get dog piled.... but...

On an 88", you go 95" or 98" with bolt-on big bore cylinder kits (or punching out your cylinders).

If you bore cylinders to 95" and add a longer stroke, you get a 103".

The OEM 96" engines are 88" engines with a slightly longer stroke.

To specifically answer your question, I have a 2003 Heritage. I put a 95" big bore kit with headwork, and it runs really well.... It feels like a totally different bike.

 

You're remembering correctly

I think 97" was mixed in there also with the 95 & 98" big bores


.

 

Thank you very much !

 

When you upgraded to 95 or 103, were you able to keep the rest as OEM?
Heads and assembly, intake?

I'll plan on a new cam, lifters, oil pump, pushrods.

But as far as the bottom end, if the runout is still good, leave the crank and pushrods?

 

IMHO... if you keep the OEM cam plate, no need for a new oil pump. Unless you change the base circle of the cams, which is often the case with new cams, no need for new pushrods.

However, any time I go into a Twin Cam cam chest, for any reason;

I replace the inner cam bearings from the OEM INA brand, caged inner cam bearings to the appropriate size Koyo Brand (formerly Torrington) captive needle inner cam bearings.

If it is a newer than mid-year 2010 with the HD "C" lifters, I replace those too. I use WFO Larry's Topline brand, Hylift Johnson #2313SE lifters.


FWIW....
When I first went from 88" to a 95" kit on my 2003 Heritage, it was just a few months old (I bought it new). I just changed cams, inner cam bearings, cylinders, pistons, and tune. I rode it that way for several years and many miles. It ran great...

A few years ago, I changed cams, added some minor headwork to the OEM heads, a new tune, and it ran even a little better...

I also changed a few other parts (cam plate, oil pump, rocker arms/rocker bases, lifters, and pushrods) not because it was necessary, but because I was bored, wanted to check them out, and I have the mod sickness...

I still own it, still ride it, still enjoy it....

 

Early 2000s people were boring their 88s to 95". At that time 95 was considered max. Then axtell started selling 96" and eventually people bored to 96. There was lots of debate, Back then Revperf came out with 98" nikal sil cylinders, saying with that liner they were able to go past 95"

I got out of it for awhile, and not it does seem common to bore bigger.

When I did my first build it was rev perf 98". 50k miles and it has wear. $$$. So I just bored my old 88s to 95. 95 is tried and true IMO, but I am sure many see it as not enough.

Then 96 came out for touring in 2007, stroked 88. People were bring like they did the 88s to get to 103s. Since then people are boring even farther to get to 107. I just bored my 96" to 103, ya I left some on the table. But it was an old bike and I wanted reliable, not pushing to the max. Many will disagree with me and say they did it fine.


Both build I reused cam plate and pump. the 88 I reused pushrods, the 96 to 103 I went with adjsutable because the cam required it. Personally I like the drop in ease of stock. Plus you should probably replace the breathers when doing the pads.

$230 to bore 96 to 103 this winter, than pistons, and rest. 2 years ago pistons and bore work $630 for 88 to 95, with gaskets.

 

To return to the title of this thread, my 2006 Ultra has 102,000 miles. Back at 40,000 I installed the SE Hyd cam chain tensioners. Otherwise stock engine. I'll keep riding until a reason comes up to do more. I do have my eyes on that S&S 111 cu motor (drool, drool!).

A few months ago I installed a Baker DD6 6 speed tranny. Really happy with it.

 

Just to veer off in another direction, I’ve always wanted to do overdrive on my 04 but have heard that the 88 doesn’t have the torque to handle it. Do you notice any lugging or do you just have to downshift up hills?

 

What I've found is the 6th gear is only good at highway speeds, 60 and up. So you're right, the stock 88 can barely use it. Now, if I get that S&S 111.......

 

Yeah, that 111 looks sweet! I plan to punch mine out to 98” when it’s time to go in. I was thinking I would drop in a six speed after that, but maybe I’ll do that before the motor work.

To answer the original question, other than regular maintenance I haven’t had to do anything that wasn’t voluntary. I painted it, changed bars and shocks.

I just noticed a couple weeks ago that my shifter shaft seal is leaking a little, so I will be digging in to that this fall.