Harley Factory Cylinder Heads ARE NOT Created Equal

Stock Harley Heads do vary by years but fortunately the one the most important changes made it all the way to the end of production. Early Twin cam heads weren't bad but they had some issues we would of rather done without. Carbon build up was an issue over time, as carbon build it up it choked off the flow on an already somewhat poorly designed head. Harley-Davidson took a pay out of the Buell play book and applied it to the stock harley heads on the twin cam engines.
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[@chip9832]

The head quality from girlfriend to girlfriend is not created equally either.

[@brianstumo8581]

I heard cumpression makes a difference? lol

[@fordj7516]

hahaha

[@daviddining5192]

Ain't that the truth😅

[@danstromness5165]

Saw that one comin'

[@PitbullSoco]

Hit or miss which ones like it when you try to manually increase compression as well

[@scrumthebum2451]

A lot of that carbon on the exhaust valve is because the head breather dump into the throttle body. Route that crap to a catch can you’ll be glad you did

[@d1mennis]

I've sprayed water into the intake while the motor was running to kind of steam clean the heads, valves, pistons and cylinders.

[@3RDOOR]

Riders of the rain ❤

[@patricklydon6935]

Took a friend's 2002 Electra glide from 88 inch to 98 inch 10:1 compression, Wood 555 cams, I found 2014 heads with electric compression releases with 2000 miles. Mild port, opened bowls for 1.90 Manley intakes and 1.625 exhaust, stock springs. Air cleaner and pipes/mufflers upgrade. Brian at Valley Racing in Beacher IL tuned the bike, Perfect! Over a 100 horsepower and over 110lb-ft torque at the tire. Later heads are the way to go! The compression releases hooked to the start solenoid didn't work. Dropped compression to 80 psi cranking. 185 psi wasn't an issue w/o compression releases so disconnected.

[@EricleNormand]

Where was this information 20 years ago, when I bought my bike? Or 5 years ago when I had it rebuilt? I treat my TC 88 as an "advanced Knucklehead", it burns a little oil, it's not fast but it runs and sounds great and I love it😊 By the way, I love your videos, I'm not into performance stuff, but still they are very well done and interesting!

[@jeffreygraf3358]

Finally, something that makes me glad I have an 05 HD.

[@getoffmygrass6974]

2005 heads are the only ones you don’t want, they were the worst flowing and corrected in 2006. You wouldn’t know until you swapped them out. A lot of guys swap them for 06 take offs and why there is an abundance of 05 heads on eBay.

[@milomanx6531]

Me too!

[@conservativeteacher1987]

Excellent information! I'm going to stick to my EVO as long as I can, but if I run across a great deal on a TC it is good to know the pros & cons of the early years vs later. I'm aware of the problems with the crankshafts and bearings on the later years, but had no idea they changed the heads for the better in 05. As an EvO guy it seems the best TC combo would be an early lower end with upgraded heads? Longevity, reliability and ease and cost of maintenance are my primary concerns.

[@travismccarty515]

Glad to have a 2015, I was able to run S&S 585s and keep the stock springs, I did do a little hand porting just to match my intake manifold.

[@johnliotta2583]

I have a 2015 also with s&s 583 cams stock springs. Bike is a monster. I don't abuse it just enjoy the power to 3500 rpm. Sounds great too.

[@travismccarty515]

@johnliotta2583 what's your compression? That's the reason I went with the 585 was I bumped it up to 10.25:1

[@peteryeanacopolis2037]

I also have a 2015 CVO Rushmore I did the 117 big bore kit from Harley on and had the heads “freshened up “ and ported along with the SE cam plate and oil pump. A couple of guys I know that did the same kit and substituted the cams that came with the kit for 585s but did nothing with the heads. My Dyno came out at 124/128 however theirs showed considerably less power. I chose to stay with all Harley parts for the build just because I felt they work well together and it’s paid off for me. That was at 52k miles and the bike now has 69k miles on it. No problems. So that’s what my experience has been. Thought you’d like to know.

[@pu1fjb0]

It seems to me to have heads ported and polished for $950(at S&S) and if a mechanic had pulled them and puts them back on at $160 an hour it is not worth it. If the heads were removed to do a top end build over to me at $950(at S&S) to get 5 to 6 HP it is not worthy. Especially if you have the new type twin cam heads.

[@corneilcorneil]

How is that even possible... 110 years in business😂😂😂

[@spaceflight1019]

Thanks for the great explanation. My 2005 1200 Sportster Roadster was advertised as having "Buell XB heads and cams". Now I know what the difference was. One guy on a blog improved his 1200 from 57 HP to 75 HP without opening the engine up...just bolt-on stuff.

[@damifino1872]

I don't know about all that, but what happened to the overloaded shelf we all got used to seeing in the background? Did it finally crack?

[@hawkdsl]

very cool info. im running 02 heads, and have already dumped money into them well before the 05 changes. They work. At this point in my life, that is good enuff🤣

[@paullesho2693]

Put the correct ratio of Marvel oil in the fuel really helps. greatly reduces the carbon build up.

[@jameshess9530]

Raises the question of if the 05 heads are direct bolt on for the 04 and below... aside from the engine mount pads machined into them. Also the intake flanges are different but just change rhe intake and you'd be good I guess. Would they bolt on? Some would say the diff in flow would be negligible between that and 04 and blow heads that are ported, but to that I'd say why wouldn't you just have the 05+ units ported just the same and make them even better. Again pointless if they wouldn't just bolt up.

[@sevenin1]

My little tip is,"watch your ice".👏

[@rickeywendt7051]

Love all the knowledge you share. Just put woods tw555 cams ,little clean up in the heads and replaced 96 to 103 jugs. Love the difference, more pull in 3000rpm and up.

[@leonardstanford1877]

All the things you talked about are true but the biggest problem with TC heads up to 2006 is the exhaust port is to small an 883 sportster has a bigger port & if you want to go with big valves & you are running 7 mm valves the biggest you will find is 1.900 so if you want high lift beyond bolt in you will have to change the guides back to 5/16 where you can find valves past the 2 inch mark !

[@user-vh7ri1xv5s]

Vance&Hines and Manley both make 7mm /2" intake valves. Above 2" you are correct about 5/16 being the only route

[@johnliotta2583]

What about a catch can? I got one seems to do the trick. Never have blow by.

[@gaknskk]

I have a 2016 103 ho and my catchcan does wonders for it , DK customs

[@jeanpaullavieille5806]

It seem to me time 103s came out another of things were fixed a well rounded motor but my 03 88ci will continue to up grade I no all the history of that bike and how it was treated 20 years old and still runs show room .

[@fernandocamilli4232]

You explain it so good brother. I love all your videos

[@tonyking2030]

I always look forward to your videos. Great information in an easy to understand format which is of great help to those of us who do our own maintenance & upgrades on our Harley’s ✅👍

[@AMeZoRaCiNG]

Best video and information in awhile. Thanks and keep the more technical ones coming!!

[@Sultan-ym9tq]

Hello from Russia! I own two Evo Harleys and watch all of your videos.

[@jamesbobo5377]

Hello from America!

[@milomanx6531]

Scott Ritter and I appreciate the Russian culture!

[@davemagee]

Awesome information my friend All the best from NZ 🇳🇿

[@goodboyringo9716]

I wish your video would have gave some info on what the 99-04 owners could do about swapping out the 99-04 heads for 05 heads. As you know 99-2001 had the magneti marelli system so switching over to the 05 head isn't a correct fit for the fuel system.

[@kendallstout3403]

I am gratefull and love all your videos about twin cams, I own two 15 model year and last fall gave my son my 01, thanks for all the info

[@LOVE-JC777]

I keep using Lucas gas treatment cleans good since new

[@kennethanderson1685]

Always excellent content.

[@johnkenneally4662]

Glad I have the 2010 TC. Just had S & S cams about year ago. I will say it runs differently. Still getting used to it.

[@Changtent]

Excellent video thanks!! I've installed S&S 510C cams in my chopped 2006 Softail Standard, high flow intake & exhaust, tuned. Getting great performance. A really snappy bike with jackrabbit starts. Your video answers some questions that help to understand why my bike performs so well against older bikes.

[@getoffmygrass6974]

2005 heads were the worst flowing heads built, they were corrected in 2006. Personally, I’m not a fan of beehive springs on serious builds but to each’s own. I’m surprised you didn’t know about the 05 heads Foo, or maybe you did and were just keeping it simple.

[@ka-bar5060]

Good to know for when the time comes that I bump up my 2016 103 HO engine.

[@gaknskk]

I have a 16 as well , what cams are you planning on using ?

[@ka-bar5060]

@@gaknskk Not sure yet. Thinking of the Zippers Torque cam for a Stage 2, but really it depends on the runout on the crankshaft at the time of order, because if possible I would prefer a gear-driven cam. On my TC88 I installed a set of S&S gear-driven torque cams and really enjoyed the performance and the "noise" truly was not an issue. I also installed a set of gear-driven torque cams on my TC96.

[@donwaltman4276]

Great video Gixx, see you next Friday!

[@r4ndoms41t]

I've been wanting some 06 heads for my 01 t sport. Apparently with a cam and a bit higher compression they liven things up considerably

[@donaldcameron8909]

I have the 07' Dyna ' and lived with it for sometime ,yes I want to go in and widen around the valve to enhance the signal from the beginning of the throttle body to the valve , it means more stuff like tools ! I like doing it myself and looks like I'm on a hunt for porting tools , in a round about way the Harley ports look like Chevy's in some respects " yeah I love this stuff fucken -A

[@sidneysnottley6414]

As always informative - Cheers👍

[@Rollie396]

I didn’t know this!Might explain a thing or two about my 02. Thanks man!

[@michaelsmith-rh4yt]

My 02 Heritage Softail started running hotter a couple years back and I'm wondering if it's from carbon buildup, runs great just hotter.

[@michaelspicer1236]

Awesome and informative video, bud! I have an 07 TC motor , 1450 and I hear that adding an EBS (exterior breathing system to the motor can cause carbon build up to burn off plus it will make the motor run cooler and more efficiently. This is important because the twin cam design tends to run a bit hotter than its recommended. You can run tubing off of the exaughst ports through the backer plate of the air breather, join them together with a Y and send it down to a vented catch can. I learned this from DK Custome, a great channel, like yours.

[@peteryeanacopolis2037]

I have to agree with the EBS controlling/eliminating the introduction of hot oxygen depleted air being recirculated back into the TB and ultimately resulting in carbon buildup changing your tune. When I did my 110 to 117 big bore kit on my 2015 CVO RG I installed the Trask assault breather along with their EBS system. The result is that I see absolutely nothing in the plexiglass cover and TB when I remove the filter for cleaning and wipe the velocity stack with a white paper towel so the EBS theory definitely works. Not a neck jerker after the EBS install but a noticeable improvement in throttle response.

[@wtf0101]

Good info, thanks

[@3RDOOR]

A little bit of riding with moisture in the air intake kept everything clean research already done. ❤

[@georgewetzel4380]

Great content; a shelf over the compressor would look great!

[@craigkemmerzell5741]

Good show 😊

[@keithgoins9646]

Great info. I just happen to have a 2005 and I didn't know this about the heads. I'm thinking a new cam might be in order. I am still all stock.

[@3RDOOR]

We need another what fits what 👁️👁️😎

[@danlonick800]

Great info. Tnx mate 👍

[@okiemale1589]

😎👍 Big thumbs up for the channel... Awesome video...

[@michaelyarmie4858]

What does GixxerFoo mean?

[@rarebreed9208]

Good video. Twinkie engines can use all the help they can get.👍

[@jrayh.6673]

I hand ported my pre 2005 heads. Spent about 2 weeks working them around little by little. About to go on the dyno and see if it was worth the effort. I mainly focused on opening the exhaust side of the heads because more or less the intake manifold pretty much lines up on the intake side.

[@SpaceRanger187]

well????

[@jrayh.6673]

@@SpaceRanger187 sux I can’t post pics. But finished off with 93.5 hp / 112.5 ft-lbs. I’m super satisfied….

[@goodboyringo9716]

@@jrayh.6673 .... What did you do about the larger valve guide hight ?

[@frankfurther3828]

EVO's forever.

[@larryslaughter7518]

One thing the early heads, had a bigger int valve , later heads int valve was smaller, I put 1.9 with 7mm stems, a lot less metal grinding required

[@milomanx6531]

Did you know 05 heads flow more than 04 and older? They do. Look it up.

[@trippontwowheels]

Do tell! Happy Friday Gixx!

[@robbaar7035]

What are the options for those of us with stock 99-04 TC 88 engines with the poorer heads, valve stems and springs?

[@MAC-co4cr]

I've got a 2002 I'm wondering myself

[@unchartedthickets]

95 big bore kit

[@robbaar7035]

@@unchartedthickets I was considering an S & S 100" big bore kit with 585 cams but would still have stock heads,

[@unchartedthickets]

@@robbaar7035 Curious about the cost/benefit scenario: 02’ - 06’ - A Zippers 95” kit is a little over 3K. You can add a gear drive cam gear set for another $600. 99’ - 01’ - 95” is $3,800. (This kit requires you send cylinder cores for boring) The S&S 100ci kit is only $1400. Complete bolt on. No machining needed. Looking at the dyno sheets - S&S 100ci 113 peak torque @ 3,900rpm then drops 100 peak HP @ 5,300 to 5,500rpm then drops Zippers 95ci 109 peak torque @ 3,200 to 5,000rpm. Starts to drop gradually after 5,250rpm. 112 peak HP @ 5,750 to 6,250rpm. Climbs throughout the rpm band and holds to 6,250rpm. Graph ends there. I think the S&S is way better in terms of cost but it looks like Zippers gets you a more performance oriented machine with a smaller displacement.

[@kjknuth9127]

I'm looking at the fuel moto 98" kit and going with their level B head work. Cam requires the 05 newer valve springs

[@kerrylewis2581]

This must be why Kevin Baxter likes the 2006 Twin Cam as the best with fuel injection.

[@ambassadorofconciliation]

What video does he say this in?

[@vaughnmcmillan8400]

Just wondering if you know anything about Merch 120 engines? I've got one in my chopper and it'd be intersting to get your insights as to which year you felt was best & why. I found this to be a very informative video by the way. Thanks for posting.

[@thomasobrien5976]

Can you retrofit the later 05 heads to a earlier twincam?

[@gregkistner1955]

Pretty interesting!

[@glenmclendon9209]

So it would pay to upgrade the heads on a 2002 fxst to the later ones instead of just the cams ? Lifters and pushrod too ? Don't want a performance sled . Just a little more .

[@chazzcapone.]

Shaved the heads down a tad, and larger valves !

[@bluezo6vett]

I Have A 2009 roadking classic it's got a 96³ motor I put a stage one high air flow kid on it and also I set of twin/ vancy & hides Exhaust bike runs pretty good but I need more torque Add some extra horse power. I was thinking about the MR103 S&S cam What are your thoughts on that

[@harleyhawk7959]

had my 05 heads ported, and I hope it helps

[@milomanx6531]

I ported only the exhaust ports on my 05 heads. Intakes were fine as is. The larger your intake ports raise your power band, too big is too much for the street.

[@travissmith2211]

So if a person has a 99-04 TC and wanted to swap heads, how much more would they have to do? Would they need ancillary parts and a tune?

[@steveallen5087]

Can I put a 2005 set of heads on my 2004 TC ? What would it include?

[@pcontiman]

Thanks foo, so I have a better top end but a lesser bottom end in my 2005 dyna, yes?

[@brucemorrison3563]

Good to know

[@XLXBhorsepower]

There is a big difference in the 2005 vs 2006 castings. 2005 yes moved to 7mm but still the -99 casting which exhaust flow was horrible. 2006 (-06) castings were a new port design that greatly increased the flow from the -99. So if you have 99-05 heads (anything with -99 casting) should be set on the shelf for a 2006 or new -06 casting.

[@GixxerFoo]

That's a great point, the heads interchange but there are differences in castings and design.

[@mickn8615]

@@GixxerFoo Tried that route, 06 inlet manifold will need to be modified as the early inlets are too short and wrong angle.

[@tex9280]

Love you work GixxerFoo ♥️💪💪💪 Living The F🤪KING Dream ❗ Safe travels 🙏♥️🐾🐾🇦🇺

[@BOBService417]

Dear Mike,do you forget our sample BM5 motorcycle camera?

[@pf1468]

will 2005 heads bolt straight on to a 99/04 model? I want to stay with the timken bottom end on the older model I have an 01 model

[@subie38x]

Is it worth installing 96 heads on a 88ci? About to do a cam tensioner upgrade plus a TW6 on my 2000 FLHRCI and my friend has a set of heads off of a 96ci that i could use.

[@mikaldene7146]

Nice to know. Good Video GF

[@mattinykanen7001]

I have s&s 79cc super stock heads. There is wrinkle paint in exthaust port. it collects all the crap. you would think they would do it properly. you have to sand it off when you open the engine again.

[@victoralcamo9044]

Can my 2000 Heads b rework to flow like the later heads

[@BillyG.]

I'm old, but dodge those cars is great information!

[@user-ig4cv3hu7o]

My question was is a fueling 543 cam too much for my 103 stock motor on that road king

[@GixxerFoo]

Not at all, that's a great bolt in cam for a 103 for stock to mild engines.

[@user-ig4cv3hu7o]

So a fueling 543 cam chest is not to much for 2012 103 Road king. Full performance exhaust KNM big flow, air thunder, max tuner super coil fat screaming eagle plugs wires. iridium. Plugs

[@jamessouthworth1699]

Of course I have an 03. No timken, carbon head, spring tensioner... Thank you Harley-Davidson.😒

[@tylerlower5140]

Is it atleast an anniversary edition? 😆

[@mycmills]

You sound just like the guy from project farm😂

[@jeanpaullavieille5806]

Ya thanks

[@Charger1908]

I didn’t here you say whether you could use 05 and above twin cam heads on the 04 and older twin cam heads? I can’t imagine that you couldn’t but I’m not sure. Thanks.

[@srenlnbk4414]

Yes, they are bolt on. You will need to replace your old Intake flanges with 06-up ones. HD part No. 26993-06.

[@HappyRamblingCamper]

I have a 2016 UL 103 H.O. Just a lil’hotter cam from factory.. what’s a good cam for this motor ? I know the H.O. Part of my 103 was more hype then anything…. Little more compression with the wet heads and a lil’better cam, but not sure of performance over normal 103 if any..

[@scrumthebum2451]

My 2015 103ho road king loves Andrews 57 h cams

[@RFWieder]

I've got a question, I have a '04 Heritage. When it had 120,000 miles on it I took advantage of the "Long block" program and got a 95" engine with a 204 cam. Of course it has the cam tensioners upgrade, but I can't really find out anything about the engine! What exactly do I have??

[@getoffmygrass6974]

Long block is a full crate engine. Before CVO in 2000, the SE version was a 95” from the factory. The stroke remains the same at 4” whether you have an 88” or 95” those years. The difference is the pistons are bigger and jugs are bored. Basically it’s just a Big Bore kit on an 88”. So if your cases are matching numbers than you got a big bore kit stage 3. Head work will bring you to stage 4.

[@bigjoe805]

QUESTION; I have a 2001 & 2003 Dyna Wide Glide’s. Do I really have to worry? Thanks

[@GixxerFoo]

Nothing really serious to worry about, 01 has the Timken lower end which is awesome. The you can always run some top end cleaner decarbon through the inkae and clean up that carbon.

[@bigjoe805]

@@GixxerFoo thank you! Appreciate you responding.

[@Jahefe13]

CCan I put 05 heads on my 99?

[@cvytnioy56dvfuj4g7]

Hi again, what would you consider the best Aftermarket twin cam heads?

[@scrumthebum2451]

Stock heads sent to zippers or similar they will work your heads on a one to one basis instead of mass produced S&S or screaming Eagle one size fits all. I had zippers do my heads for how I ride my bagger in 2000to 5000 rpm

[@user-wg4sv3oc7v]

I have a 2000 dyna 88. Can I swap out the heads for the later model heads for the better performance and reliability?

[@srenlnbk4414]

Yes, they are bolt on. You will need to replace your old Intake flanges with 06-up ones. HD part No. 26993-06.

[@joshuabennetts6847]

Would it be worth it to go to S&S super stock heads? Going to a 95 kit and 585 cams 99TC

[@mattinykanen7001]

You get about 100hp/145nm. But its start to go 3500rpm. I have this setup whit mikuni 42 on dyna. No low end torgue.

[@bullast2046]

Hey, Gixxer, what’s that breather setup?? 6:35

[@GixxerFoo]

That's a Feuling rocker box breather kit

[@parkeslife4323]

At what number is a cam considered high lift? I've heard generally it is considered.590 is the maximum lift on stock 05+ valve springs before needing to change them out. Have a set of Woods 222 ready to go into a 15 Streetglide Special and am considering CR 570-2 or S&S 583 for the 08 Rocker C.

[@johnliotta2583]

I have s&s 583 on my 2015 stock springs. I called s&s before I bought them they said 2015 could handle up to 590.

[@parkeslife4323]

@@johnliotta2583 thanks. I'm putting them in with stock springs. Until something "breaks" anyway. Bolt in is bolt in right. How do you find the 583's? Most people (Softails and Dynas) just go straight to the 585's. I'm more interested in torque than horsepower.

[@gregduncan1001]

you do not need to change springs with that, I have one your going to love it ,get a good tuner don't use true duels pipes.

[@gelfyd1]

Can you bolt on 2005 heads on an ‘03 or ‘04’ twin cam? Love your videos!! 😊

[@srenlnbk4414]

Yes you can. They are bolt on. You will need to replace your old Intake flanges with 06 up ones. Its part No. 26993-06.

[@3RDOOR]

Yup me two

[@paulperrigo3517]

15 sg spec 103 ho feuling 543 kit!!!

[@MicahBell_1860]

I'll go rhythm

[@rvator7291]

Does anyone ever question why Harley has design issues which given the fact that they have been making cycles for a 100yrs should not be happening ? Bad head design, oil pumps, lifters etc ??? Maybe they need a engineering dept house cleaning. Every manufacturer has a design that does not work out but we are talking about a 100 yr old engine design. They should be like a Lycoming Aircraft engine by now which are old school design but bullet proof. I dont get it.

[@chumpthetraitor7331]

They're made in Chynna

[@GixxerFoo]

It's easier to count what isn't made there these days sadly...

[@crspcritter]

110 heads and be done - 😁✊🏻👍👌

[@GixxerFoo]

It's hard to find a set of 110 heads that don't cost an arm and a leg, those things are like gold.

[@crspcritter]

@@GixxerFoo yes sir ; some folks think it all that bad with how many birds you kill with one stone . ✊🏻👍👌

[@feloniousmonk3049]

Glad I have a 2018 M8... 8 valves, lighter, lighter springs, hardly any oil consumption.... 107 CI, balanced crank, single cam, factory oil cooler... it's all there, for the better.

[@thomasborger6548]

Shame on Harley for hiring flunked out engineers to design the early twin cam heads. The hell is the matter with them?

[@donwaltman4276]

Only an engineer could make a bad idea sound good,, "what could possibly go wrong?"

[@jimmyp6443]

I have advice for panhead heads