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[CHiZ_65]

I was hoping you all could school me a bit..

-is the 2005 103 SE engine a true 103, or is it a stroked 88"?
-What sets this engine apart from the newer 2013+ 103" engines that come stock? Simply the Heads and Cams and the stage 1 from the factory?

Thanks!

[grc]

Not sure what you mean by a "true 103", but it is a bored and stroked TC88 with unique hemi cylinder heads and the displacement is 103 cubic inches.

Bore = 3.875"
Stroke = 4.375"
Compression Ratio = 8.9:1

The current production 103 shares the same bore and stroke, but the crank isn't the same as the 2005, and the heads are the standard heads.

Jerry

[CHiZ_65]

Thanks Jerry. Those are exactly the specs the HD dealer has given me on it. So, all newer 103s are also TC88s that are bored/stroked to 103" by Harley? Or is the starting point a 96" with the newer bikes?

What is the difference in the newer cranks vs the 05' crank? (allow for more power?)...I appreciate your insight!

[Ironhorse]

And, if I'm not mistaken, the 04-06 CVO 103s came with a SE253 cam.
You can hear it's distinctive "lope" at idle, at least I can with mine.

I did not know the newer 103s were also stroked. I thought only the 04-06 CVOs were stroked. I learned something new today.

[erniezap]

And the newer cranks and bearing combinations are junk...

[bakon]

88 was first.
95 is an 88 bored, Harley sold big bore kits with larger jugs and a set of pistons, aftermarket just bored the cylinders of the 88 and slapped in pistons to fit
103 followed, a 95 stroked.

96 was then made- its the 88 cases with the 103 stroke, so Harley could sell same cylinders in original big bore kit, different piston, taking it to 103