The Twin Cam 103 With Hidden Secrets | Harley-Davidson CVO 103 

Do you think the CVO 103 being a stroked 88 would run off and leave a CVO 110?

The 103+ heads back then were proven to be some of the best, if not the best Twin Cam heads ever. They are hard to find now and spendy. Wish I'd have picked a set of them up ten years ago or so. They were relatively easy to find then and relatively cheap. Kind of a well kept secret as far as heads go.

Don't know if anyone has said it lately, but, thanks. Your videos are gold to anyone new to the HD TC engine platform. Especially to anyone looking at a used bike. HD should just send you which ever one of their big twin bikes you prefer.

Thanks for making that clear for me. I have a 06 ultra classic with an 88 in it. Then I started getting some bottom end sounds so I take it to my local harley shop and ended up doing the 88 to 103 method. With your help, now I know where the idea came from. Good rides people.✌

REALLY APPRECIATE the time, effort, and overall layout of your videos. They’re so informative to the point where I hope to join the Harley community (I only own Japanese sport bikes). I also wish to maintain and slightly modify my future hog/s (I believe u referenced the HD manual on a previous comment, and it’s useful step-by-step structure). Please keep them vids coming!

Thank you! Just purchased a 2006 SE CVO Fatboy. Keep up the good work.

I have a 2005 cvo Electra glide with 103 got 50.000 miles now only thing I've done since new is service best engine I've ever owned on any Harley I have

That short stroke 4.00 motor revs really fast. Add a good set of heads and cams and she will pull.

Great informative video, thank you for posting it.

I ride an '05 Ultra with a SE103 Stage I built new by the dealer (American Eagle H-D) in Texas. All H-D , 10.5:1 pistons, SE255 Cams, Clutch, SE Mufflers, and SE Race Tuner Kit. Dyno at 500 miles = 95.44 HP and 103.98 Torque. This bike has 87,977 miles on her. It has all original parts - Clutch, starter, mufflers, Trans, even hand grips. (on her 3rd stator) Used SYN3 oil in Primary, Trans, and Crank since new. YES it has a H-D oil cooler. This bike is better than new. She still begs for that triple digit run. A bad ass machine no doubt. I truly enjoy your videos. Great information. Keep it up.

Another great video, Keep them coming!

Private Cowboy Full Metal Jacket ? I think so... ✌🏻️

I don’t know if this will walk away from a 110” and don’t care, what I did learn is that it is fast, torquey and strong! Great info thank you.

This is similar to the engine in my 103 Police edition Road King. I'm not sure if it was ordered from the factory with a stroked out 103 with the larger cylinders, like an '03 CVO engine, or if it was built later. When I bought the bike, I wanted to make sure that I had performance at highway speeds. It has tremendous torque and is very fast for an old touring bike. It quickly hits 80 in 4th gear, and easily cruises at faster speeds in 5th. In fact, when I get to a 55 or 60 mph stretch of interstate, I have to down shift. It feels like more power than my 2020 Low Rider S that I sold because I wanted a better highway bike. It has a power tuner, a huge cam, and no screamin' eagle logo on the heads, so I am thinking it was some kind of police 103 modified for more power later. I DEFINATELY recommend a stroker build, if you want the performance of a newer 35 to 45k Harley on your old paid-for touring bike.

I have a 2013 Flhx with 103, i put a d&d fatcat full exhaust and tuned it myself with a dynojet power vision without o2 sensors. Its been awesome. Reliable and singing along.

Very good video. Again.

my o7 Police RK manufactured 08/2006 has the 33.875 bore with the 4.375 stroker crank produces 101ft of torque at 3000rpm stock

Heck yeah good info again

Another great video my friend! I remember in one of your recent vids you said that there’s a difference in cvo heads and high flow screaming eagle heads. Can you tell the difference from how they look externally? If the flow rates are different how bout the springs and etc. ? Thanks in advance

Thanks for the break down

I have a 2005 103 CVO that I did some work to beef up the weak points and added a complete cam setup with compression and I am getting 115hp/127tq at the rear wheel. I left some on the table for future work if I want more power but it has been a fun ride and never lets me down.

This is a great channel

So this is a video of the 103? Just kiddin, great info 👍

I have this engine, Love it!

Such a great video I watched it three times. Thanks My 2000 RG (bored/ss gear cams) Will stay with a stock 110 but not over take it. So maybe there's some truth behind the Screamin Eagle version in 2003.

Great video brother, I miss my 06 CVO Ultra Classic,it had the leather tourpak on it, and it was a good bike, very well explained 💯👍🏼

I had an ‘06 CVO Ultra 103 I bought new. Strong torque. Always searching for an extra gear. Plenty of torque to pull an overdrive, except no 6th gear.

Thanks Gixxer

the 103 motor on my 2014 ultra with a stage 1 and vance n hines header pipe, n vance n hines highout put slip ons, had lots of low end torque and ran strong up n down hills with minumum down shifting, it can strong but on the freeway my speed was topped at about 86 mph pushing it harder there just wasnt nothing more it felt like I needed another gear to upshift, now my older 2010 ultra limited I just down shifted more on the hills, but on the freeway that bike would get up to 110 mph no problem at all compared to my 2014 103, so my first new Harley is a 2021 new road glide limted with a 114 engine, I put a stage 2 on it before bringing it home screaming eagle cam, n vance n hine power duals with rinehart slip ons, talk about a very loud bike n the idle is tough sounding too, sure its not a woods cam or s n s cam, or a zipper cam in it, but compared to my last 2 bikes n putting out a humble 117 torque at 3500 rpms that bike is going to be a rocket compared to what Im used to, and have long legs on the freeway the way I had it built for, sound n the freeway, long legs while keeping my factory warranty, I wasn't trying to build a race bike, but wanted a very fun enjoyable bike, where i twist on that throttle n go go go around anyone I want to pass, and find my own solitary piece of the road, but thats me I watch for my own safety hazards, 3 million miles in a semi would kinda qualify me id say

@GixxerFoo can you clarify. So I have a 95” in my now KingGlide. If I want to go 103” stroker, change the flywheel only? I am able to use my existing 3.875” Wiseco pistons?

Wow great research. Keep up the fantastic work. I am curious what you may know on the newer M8, which is only 4 years old.

Thanks for your videos they are the best for explaining… I’ve purchased a 2016 Heritage classic with a 103 High Output. But I’m unable to find what cam and other goodness has been put in to make the high output? If anything? Thanks in advance.👍

Yes I have a 2006 Cvo with a 103

I got a 03 ultra with 106 stroker S&S with 55 mil throttle body on nitrous. I have 585 cams now if I put 640 cans do u think it would produce more pwr leave the 585 in it? I cant find a straight answer, I would presume it would make more pwr!

Ok I have the 2005 Fat Boy CVO 103 . Upgraded air intake and exhaust DK custom. After watching your video on cam upgrades I’m tempted to install the Wood tw222 cam . What do ya think about that choice ? My bike has the screemin Eagle heads and valve springs. Will that motor handle a more aggressive cam Thanks

I found my buddy a 2006 cvo electra glide with the screaming eagle 103. I walk on him everytime he wants to bring it with my Slim S with se110 it dont matter if we taking off from a dead stop or we cruising and hes a head of me a few car lengths and he gets on her I'll pass him n start walking with him giving it everything and I'm just riding lol great video. Watching from Upstate Ny

Thank you

I have this motor.. what else can be done to it now to take it to next level..good video

My ex 2000 deuce 88ci that the previous owner turned into an 103 stroker smoked any and all 110 CVO embarrassingly so! Not even close. Like half track. I wish I was knowledgeable in mechanics and could go back in time and watch who ever built that motor. I do have previous owners receipts. Stock dyno was 58hp. After everything the 103 was 119.9hp I wish I’d never sold. When I did sell the stipulation was if he ever sold would be to me. But sadly he passed away and left that rocket to his 18 year old grandson. I’ve tried several times to buy back but no go. Anyway Another great vid! I’m looking currently between the 2009 fire quartz 110 dyna fat Bob and a 2012 plain 103 WG . Common sense should lead me to the 110. But the WG has an amazing custom paint job ( even better looking than the 2009 fire quartz and black which is my fav all time HD paint scheme). I’d prob have to send the WG to Fuel moto and spend $10k to even feel anything like my deuce 103 stroker. I know the 2009 110 cvo would need at least half that much as well if not more to feel like that 2000 stroker. Question , can you make a stroker out of the 2012 103’s? If so you want the job and create me a 130/130 hp and TQ bike? How much would that cost a feller?

I just picked up a 2005 SE CVO 103 Electra Glide. Not bad. I’m about to crack open the the king cover, I hope they upgraded to hydraulic!

I have a 2006 CVO stoker 103. What cam would you put into wake it up a little?

Awesome vid. About to buy an '05 FLHCI Road King with the 103. Is this considered a factory upgrade? I suspect dealer-installed as I can't find SE or CVO designated RK's out there for back then. Does the higher output increase the likelihood of spring-tensioner issues? And if I do the hydraulic upgrade, what might you recommend to further upgrade in this 103? Thanks for your expertise!

Man these 88 twin cams are hard to beat I may this winter make my 88into the 98 if I don't buy a street glide 2013 or higher

I got one of these 88's, built by my local race man. Screamin Eagle heads sent off to Ward Performance and ported, inside and out. 10,000 off head to increase compression, 10 to 1. Ward Cam 255 duration and 63 lift. Stroked and valves ground with 4 angles. Big throttle body and Cam gears. Only 600 mile, so not Dyno yet, but she be fast! 2006 Dyna If I am at a slow roll and open it up, it will lay rubber all the way till shift.

Does the SE Crank on a 2005 CVO 103 use the timken bearing setup?

Hey, I have a 2006 electric glide with an 88 in.³ motor what engine package from S&S would you recommend I want to get the most performance out of this motor I can get

Great video, thanks for doing it on the CVO 103. That being said I have a Thunder Mountain that came with a crate 2005 103 SE. I'm wanting to bump the power up and would like some advice. What would you think of going with a higher compression piston? What about changing the cams out and having the head ported? I would appreciate any advice to help me out.

TC Harley Davidson engines are great to modify, there is plenty of parts out there and easy to work on.

I have a 2006 CVO Ultra. I wanted the CVO 103 engine and NOT the 110. Too many of my friends with the CVO 110s were having problems.

I have a 2007 FHLP police road king that was manufactured in August of 2006. it has cable clutch cable throttle and correct FMH vin on engine witch is a 103ci. my ? do I have it a late model 2009 103, or an early stroked 88 103? thanks

And 2002 had the heavy duty timken bearing on the left side case!

YOUR VIDEOS ARE AMAZING!!!!!! So I found a 103 Screaming Eagle crate motor, in a small dealership in Ohio!! 0 miles, never mounted, in the BOX!!!! I have a few questions about upgrades and your thoughts. I have a stock 2005 Road Glide.. 1) Is a Chain Drive Conversation recommended?? 2) Which sprocket gearing conversion would you Suggest ??? 3)And do you recommend and transmission upgrades?

Love it

In 2016 I purchased a 2014 flhtp 103HO with 2600 miles on it. It was part of a 2 year police lease program. It now has 27,000 miles and I’m trying to figure out what I can do to make some upgrades. I live in the north east so limited to 8ish months of riding. Any suggestions would be appreciated thank you.

So I have a screaming eagle 103 on my 2005 ultra electra glide, bought it used,it dyoned out at 103 hp, so what was done to get that extra 30 hp???

Well I got bad news my cam chain tensioner went out on me today 80 miles from home any info on how to fix it is well appreciated especially for us on a budget also a better way to get in contact with you lol

Pretty interesting, what fuel system did Harley use with this CVO 103?

What are your thoughts on the 2012 softail convertible cvo? Looked at one a couple of days ago. Just had over 17,000 miles. Thanks a bunch.

I own a 2016 Road King Police. Is the 103 a regular one or are there any differences? Hard to find information about this…😳

With the early 103 only having 9:1 compression why does mine have compression release’s that it won’t crank without using? Any help appreciated.

Supposedly a Rod Length/Stroke ratio of 2:1 is the best, which is why the early Laverda Triples of the 1970's were such beasts. Of the 24 bikes I've had, my 1975 Laverda was my favorite, but I just couldn't get parts for it. Now they're museum pieces, so I settle for a friendlier 1971 BMW R75/5, as the Germans are much more businesslike than the Italians.

So I have a late model 103 would it be any benefit for me if I was to get a set of those heads and use them on my 103 . Or even using a CVO crank stroker crank that is along with those heads and maybe a 107 big bore kit..🤔

Need your opinion. I just bought a 2003 road king cvo FLHRSEI2 screamin eagle (the gold w/graphics). It has the 103. It has 27k miles. I pulled the cam cover and the cam chain tensioner shoes need to be replaced. I'm wondering how far go when replacing the shoes. Perhaps upgrade the cam plate, cams, oil pump, bearings, etc?? I'm not trying to make a race bike, just a dependable ride. What you think?

And these facts and trends are the reason I'm holding out on an M8, I believe that 131 crate motor may eventually become standard equipment, when it does I'll be ready but until then I'm having plenty of fun on 2015 dyna, the 103 with some aggressive cams and a little head work, higher compression achieved by a simple gasket swap and she scoots.

The motorbike I bought is a 2003 Screamin Eagle 103 with 264 cams and high Compression cylinder Heads, and D&D performance exhaust 2 into 1. Before starting, there are 2 blue buttons that I have to push or I will damage the starter. I am thinking cylinder decompression buttons and updated ignition system as well. Dyno tested 100 hp and 104 ft/lbs. Would this be a factory build or a custom build by the owner?

Hi 👋🏼, I actually have a 2003 Road King CVO Anniversary Screamin Eagle and wish to know what upgrades I can do with it especially as it relates to the compression ratio ( currently running @ 9:1)? I’ve upgraded the cam (Feuling 576 with hydraulic tensioners). The valve train is a bit more noisier which is probably due to the high lift combined with low compression? Need to know what would be my best SE piston combination including new pushrod setup?? Thanks David

and as a stroked 88 i think once cases are updated its not stroked as such an 80 is a a stroked 74 an 88 is a stroked and big bored 74 ..i think its hard to categorise them like that ,even though it is the case .. as you said the cases were over bored for bigger spigots for the 96" barrels (95) in 88 but still can be bored out to 95/96 (96need stroke though) 103 problebly really an over bored 96 as mine is but with some upgrades lol ...love your channel only new to it ...

I’m under the impression 96 heads flow better than the 88 even ported 88. This is why I haven’t gone M8. Can’t just the extra cash for not much more.

The OG twin cam is the best one . Only thing you have to do is install a gear drive cam system to make it a bike that just needs gas & oil changes ! If you want a real hotrod bore the case's add a set of 4&1/8 cyclinders & a 650 cam & you got a 107 cu in motor that will out run 110s & 114 M8 motors ! Short stroke big bore motors rule !

Quick question. Last year I bought a 2006 Softail Deluxe and absolutely loved it but it doesn't have that much power on the highway.. so yesterday I bought a 2005 Softail Deluxe with 5,000 miles and the Screaming Eagle kit from the 88 to 103. The ride home from South Carolina to North Carolina was 4 hours and I could really feel the extra power on the highway. To be honest I really couldn't feel a whole lot of extra torque taking off on the gears but once I was on the open road that's where I felt it. Now my question is that it came with the same size pipes as my previous Softail Deluxe but it's not as loud at all. Why is the 103 upgrade not as loud as my Vance & Hines pipes

I'm going to look at a 2009 Road King with a 103" in it. Any guesses if this is a kitted 96 or a stock 103?

The twin cam is the motor you want for sure. I mean looking back, the 1st generation of any engine from Harley, had issues to iron out. The 1st gen twin cam had some major issues, from scizoring cranks, to the tensioner foot breaking apart, causing plastic shards to lodge into the oil pump, grenading the engine. The last gen evo, was a much better engine than the 1st gen twin cam. Down the road, after its 3rd and 4th generation, those issues were worked out and in the later generations, it becomes a much better engine than the evo, at least as far as a platform ( the evos are still great engines, for both nostalgia and longevity, but for a performance platform, the twin cam I think is more capable, more efficient, and probably has better parts availability, since the evos are pretty old now) , that being said, looking at a 1st generation Milwaukee , I think they have work to do, as there are some issues with it. Do your own research on it. I'm sure the bugs will be worked out, in a second and 3rd generation m8, and by that time I think it may be a better platform for the enthusiast, but I tell everyone right now, to go with a last generation twin cam, it's a great engine, with lots of potential, and has a great parts availability. I do however think that because of how Harley press fits the cranks, that scizoring can still be an issue, but I think it all comes down to how you ride it. That low end torque is available at such low rpm, that many people will lug the engine down low in the revs, which is what really will cause the problem. Keep the engine in its rev range, dont lug it to hard , and scizoring will never be an issue, but these guys riding along at 1500 to 1800 rpm, are really stressing that crank. I had a 2015 softail slim 103, was an amazing bike, and I always kept the engine above 2300 when riding it. You'll get 100k np out of those engines if you are mindful of that. In other words, just because it pulls along nicely at 1500, doesn't mean you should do it, not to mention that you have much better oil flow when keeping them above 2300. Don't lug these engines below there operating ranges, and they are beautiful. The scizoring issue is not a flaw, but more of how people ride. Great video btw. I since sold my softail, picked up a buell xb12s, amazing bike man, so under rated lol. I would love to see a buell build, it's an excellent platform, excellent chassis, with incredible breaks. I'm amazed pulling up to bike meets, and no one knows what it is. They are becoming very rare, and are worth keeping alive. I think Harley mad a bad choice ( just my opinion) discontinuing a sport bike, using the beautiful cave man engine. There is a big market even now, of people who I think would love a modern sport version of a buell with an m8, I really think Harley should get back in the spotlight, and build a sport bike using that engine. Obviously it would be niche, but if they could do it for a good price point, I think it would be a game changer. Excellent video man great build xD

Top.

What cam plate did the screamin eagle 103 have in it?

Can a stock 88 be made a 110 without crank work?

What about the 2005 scream eagle 103 motor. Can I put a tw222 cams in it

Awesome video man!....I own that 2003 cvo road king, centennial gold, with the screamin eagle 103. It a getting work done on it, andrews 57h cams, 10 over bore, wesico forged pistons, 10.8-1 comp, cnc ported work done on the heads, as well as decked gasket surfaces, 5 angle titanium valves, and s&s stealth air, bassani 2 into 1 rr3 stainless pipe....its going to get dyno tune once broke in. I love this bike, it pulls like a freight train, I cant wait to see what it's gonna do with the new work....whats your thoughts on this build man?....id greatly appreciate your input

I just bought a 2004 CVO Electra glide the 103 SE heads compression releases I assume is stock. Just a quick question is there anything I can do to pep it up ie cam change without splitting the cases ? Or am I gonna have to bite the bullet and drop major coin lol thanks

So what’s the best the 103 or the 107

Hello. recently I am also a happy owner of the 2003 cvo anniversary edition but what I wonder is the following, because this is a screamin eagle version I do not know if the compensator is also from screamin eagle with that open star or the one that normally is in the 88 inch

Hello. Will 96 or 103 crankshaft fit into 88 motor with dual Timken bearings? I want to bore up and stroke my 88 to 103.

Is the 03 cvo efi? Or carb?

Were is your shop?

My M8 107 has made short work of a few TC 103s and 110s

so what do the 2007 103 cop bikes have?

Your Awesome, I had the 2005 FLSTSE or Fatboy CVO. It was impossible to get a straight answer of the origin of the 103cid was it stroked 88 or a new motor that started at 103. Unfortunately I wrecked it and lost it when I used insurance payoff to live and not buying the bike back and repairing it. I now have a similar situation with the 103cid High Output in my 2014 Rushmore StreetGlide Special. As far as what Cams it uses. Are they the CVO253 used in 2003-2006 or are they something else? If you can clear this up for me I would be very Thankful. That was a very good video full of useful information.

Did that motor have the Timken bearings in it?...i have that exact road king that you pictured...i put a bassani road rage 3 stainless 2 into 1 with an s&s stealth filter, with a pc5....it runs boy let me tell ya!.....its getting andrews cams, 10 over bore and hone with weisco 10.5 to1 forged pistons and all the fixins it needs to accommodate those parts....then it's going to the dyno. Dont ask me why, I fell in love with the bike, its a great motorcycle!...handles like a dream...i was told it has the Timken bearings in it tho getting back to my original question....

I have a 2006 Thunder Mountain custom with a 103 screaming eagle motor in it , Can you tell me the particulars about this build?

What about the RK in 2007 and 2008? Stock bike with a 103. I have both!

Question, 06 RK with a tc88.. I'm at 70k miles and want to build a 103. Can I grab a 96 crank, 103 jugs and some wiseco pistons, and re use my 06 88 heads? If so that would be alot cheaper than buying a "kit"

Question, I have a 2019 Street Glide CVO that when I am riding with the tach between 2200-3000 rpm and roll off the throttle I smell burnt oil. Any ideas?

Is there a difference in the bottom end in the 09 96” and the 10 103”. If I put a 103 kit on a 09 96 would it be the same as a 10 103?

8:14 What was that? A fart? lol...Can you do a video on the 2006 street bob, it shares features of both the old 2005 down and newer 2007 up dynas. I cant find a video on this one specific year bike. Why a 95 kit on this year bike is so impressive. That would be great.

You need to do the evo engine.

I am looking at a 02 road king and I'm told that it was upgraded to screaming eagle stage 4 10000 miles ago. I can't find much info on what "stage 4" would be but I'm thinking it would be the equivalent of the cvo 103? Anybody be able to chime in on that?

103 was available in 08 in the Electra Glide Police

My V twin sportbike has a very wide bore and short stroke. It redlines at 11,000rpm. Makes me wonder if you could do similar with an 88 crank with the biggest bore cylinders available. Of course, cams, heads, valvetrain would all need to be carefully matched to suit. I have seen some impressive performing 88s.

So I have a 2007 police electra glide, what 103 is that?

So I got a 2016 103 wich engine do I have???

Lookn atta. 2012 dyna fat bob . 6500. Miles. Taken c/o. Stage 1