S&S 124 Twin Cam Engine | Before You Buy
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I have an S&S 124 HC Twin Cam crate motor in my 2015 Street Glide with 47,000 miles on it. I've been all over the US on multiple trips in 30 to 108 degree weather and have had minimal issues with this engine. I can cruise between 80 and 125 MPH all day in the western states and this engine loves it, yet it has good manners in stop and go traffic. Maintenance is the key to reliability and longevity with these engines. I do my own work and make sure things are right between trips. I took the heads off at 20,000 miles to look it over. Although things didn't look bad, I honed the cylinders, put new piston rings on and replaced the valve springs and seals while it was apart. I also replaced the lifters at the same time. I viewed that as cheap insurance. Like this guy said, a clutch upgrade, air cleaner, exhaust, ignition, throttle body, and a bigger oil tank were all necessities. I also change the oil every 2500 miles and use 20-50 synthetic.
I have shut it down a few times in stop and go traffic on 95 degree days when the factory head temperature sensor hit 330 degrees to prevent possible damage to the engine, but I do not have an extra oil cooler or head fans like this guy does. I chose not to spend the money for those things and just watch the temperature in tough conditions. I have not converted to chain drive and I'm running my original belt, but I don't do burnouts, 2nd gear wheelies and stuff like that.
I'm running a 2 into 1 exhaust made by Khromeworks and I have to tell you, it sounds pretty good going over the Rocky Mountains at the higher RPM's. My engine dynoed 148 horsepower and 142 lbs. of torque. I had some head work done by MegaFlo to raise the horsepower a bit.
No regrets, I would recommend this engine to anyone who wants to enjoy serious power and is mindful of regular maintenance.
Surprised didn’t need chain conversion, good to know the belt will hold up at 130hp.
Like I said, I'm not doing burnouts or 2nd gear wheelies, my power is applied at 50 MPH and up. My horsepower is 148 and torque at 142 by the way.
So a pos Harley design motor was garbage at 20k. Awesome
Got 20,000 miles on my S&S 124" in my 08' Electra Glide with S&S 635HO cams and their 91cc heads CNC ported by Rick Ward. Dyno 135hp/146tq! Torque peaking @4000 rpms which is right where I want it! Great bagger setup! Now I didn't cut any corners. I have a S&S TC3 cam plate and oil pump set at 40 psi, Screamin Eagle compensator, Barnett billet clutch basket, Barnett Scorpion clutch with a lockup pressure plate, HPI 62mm TB, 6.7 g/s injectors, Screamin Eagle Heavy Breather air cleaner and a D&D Boarzilla exhaust. Oh and I run 2 oil coolers and the oil temp never exceeds 210°f. I did it right! It was a setup I saved up for 8 years and I finally captured my dream! It gets 40 mpg and I absolutely love it! Now I will be replacing lifters every 20k miles but that's part of the whole thing.
I’m considering a 124 for my 14 street glide performance bagger build.
However, changing lifters every 20,000 miles would suck for me because I put 20,000 miles on pretty damn quick.
That’s two seasons for me and I don’t ride from November through March when we have winter and salt on the roads
why do you have to change lifters every 20k
I've got a 1979 FXWG with Santee frame and a 100 CID EVO Revtec, 6 speed gearbox, hydraulic opreated dry BDL clutch, Delcron transmission cases, primary belt, chain to the rear wheel, 100hp on the rear wheel. 148Nm torque. Tuned for reliability. Quite fast. Engine has been there for at least 20 years. Love this video.
This bike is one of my all time favorites. The attention to detail is out of this world. Nailed it buddy 👊🏼
Much appreciated guys! I gotta go back and watch the build you two did on the Dyna, didn’t know about that one
@@FXDLSBrooklyn thanks man! It was a budget build to show everyone you can make something capable and look good for not too much coin! 👊🏼
@@VPCustoms yeah, clearly I didn’t see that one 😝
Who would want a new bike when you have a bike like that? My Evo,TC, and M8 are all high compression,big cam,high rpm bikes.They all run from Ohio to Daytona and back every year with no incident.Only reason for bikes built like that is a few of us just plain enjoy mastering big power,then using it.Very nice build.👏👏👏
Couldn't agree with you more man! Sounds like you have a pretty similar garage as me in terms of variety - Appreciate you checking it out!
I agree. To me, building a harley and having it operate as near to flawless as possible, was a right of passage. Growing up seeing the guys that had bikes and couldn't ever keep them running well and seeing the guys that had highly modified bikes that seemed to always be running good without failure, I always new it had alot to do with the operator. Although for me, while growing up, those guys were riding mostly shovels and a handful of evos. Regardless, it had been a goal of mine since I was small, to one day have a harley, not be stock, and have all systems operating concert.
@@whatyoumakeofit6635 your life sounds pathetic
I want a piece of shlt Harley when I grow up.
This guy
I’ve got a 2011 Ultra Limited with a 96 Twin Cam upgraded to a 124 Big Bore kit, dealerships always wanna try to get me to trade up 😂😂😂 I keep telling them nope will they can get me a new bike we the same setup or more power.
I have a 2001 FXDX with a 124 R+R on it. Rear wheeled at 140tq @ 4k rpm, and 140hp @ 6400 rpm. All forged, and welded pin. 640 lift cams. Thing rocks!
Dude with that being a lighter bike, you must be pulling the front wheel up on that thing - Insane build 🏁⚡️
i think im going to do this with my 88in 06 dyna
Where can I get fairing and lowers like that?
RWD & JD
How does the lowrider ST compare with it ?
Good question, honetly man, in terms of torque, that 117 actually definitely gives it a run for it's money with a proper tune - In the long run though, the 124 will definitely pull ahead
All in how much you got in the motor swap?
@@user-mn4ii3gi9w probably enough to have bought a new bike 😂
I’ve got the 124LC motor in my 09 Street Glide with a D&D 2-1. This motor is a BEAST! Been running it for 3 years. No issues.
Excellent review boss! 👍Clutch? Barnett or AIM? Front suspension ohlins? Overall handling by old dyna platform ok?
Ohlins rear legends front - With upgraded motor mounts, it’s one of the best handling Dynas I’ve ever ridden - Appreciate the kind words!
Life’s short. Play hard. Excellent big picture info.
Really appreciate you stopping by as always man ⚡️
I think you're right. Big motor for the long rides. Doing local riding just holds the bike back from doing what it wants to do! The Dyna and more realistically the FXR are built for local riding. Just curious as to the MPG on the 124.
I gotta go back and check my records, but in the last summer bike trip it was impressive and the same that my friend with a 110 was getting
What was the the ball park amount for the build parts and labor?
Such a beautiful ride man, my 2011 dyna has the 110 tire shredder making 106hp and 122tq and is plenty of power for me though I do entertain the idea of a 124. I'm a fair weather rider so it would probably be a waste of money for me plus I also have a 2020 z900 for when I do feel like hauling ass lol!!!
Great info!! Engine looks 🔥 I would love to see little side by side action with the St ;)
The ST actually holds its own in comparison - It’s like a sports car vs a hot rod - Appreciate you checking it out!
How do you feel about that ferring setup? Alot less fatique when riding hard for long? I run a 14 street bob with a few things done to, but i do ride it like a dirtbike, id like to do this someday because im never getting rid of that bike it was a dream of mine forever when i got it after countless junky bikes, i knew i wanted a blacked out dyna
Definitely helps with those longer miles
My favorite build of all time! Absolutely love your bike man, i wouldn't change a thing!
Really appreciate that man, thank you! 🏁 ⚡️
Have the 110 in my roadking
Okay
I throughly enjoy your videos, very well put together. I too run a S&S 124, and cut a few $$ with having a bike builder custom build one for my needs. I'm still cranking out 140/140 on an "08 Road King and it's my Sturgis travel bike, strong as hell. You can't go wrong when wanting more power than with some major cubes. As for some of the associating upgrades, the compensator is a must as is the clutch and I found the front motor mount needed upgrades. I have put nearly 20K miles on the factory belt and tranny with this engine, no problems.
Love your bikes, videos and enthusiasm, keep it up.
It's really awesome to hear someone else doing the bike trips with that engine as well - Totally agree with the compensator, I got a away with maybe 3k miles before I knew I needed to upgrade it - As for the belt, after I saw my buddy break two of them, I knew I had to change it - Appreciate you 🏁 ⚡️
Some kid on a 2003 gsxr 600 will blow your pos Harley off the road
My 93 FXRS ultimate 113 loves high speed hwy miles. And contrary to popular belief it’s made in USA as our the jugs, pistons and assembly..great review..
How is that engine all around? I’ve always been intrigued for my FXR
@@FXDLSBrooklyn so far been great for me. I did upgrade the carb to SS G. I”d do it again.
I’m out today in southern Massachusetts it’s 44 degrees suns shining great day to ride.
High speed on a garbage Harley??
My every day ride 1992 ST with an old S&S 124 Evo runs like a clock. Long distance runs are effortless. New Zealand
That's what's up!!
Has anyone managed to squeeze one of these 124ci in a Sportster?
I would love to see this, that would be out of control - I feel like you would have to cut the frame to do something like that
I have an '04 ultra that I am in the process of rebuilding. Not sure what engine I'm going to use. I have considered the 124. My concern too was long distance rides. I do understand most of the things that go with such a change except, Why did you have to change the oil tank? Thanks for the great video.
It definitely handles long distance miles really well 🏁 ⚡️
Im replacing my 110 with the high compression 640 T124. I already have scorpion clutch, baker compensator, 58mm hpi throttle body and d&d Boarzilla. All this in my 2014 cvo road king. Like you i take at least one several thousand mile trip a year. To battle the heat in Texas im running a Jagg fan assisted oil cooler. Hope for some big numbers 🙏
Yeah, need big power to go 80mph in a straight line. A 1980s 500cc yamaha twin could do thar from the scrap pile
Hahaha, the gamerax styled icon.
But no, a handy video. Despite any cons I'm yet to see (as i'm only starting the video), this still will be an option on the horizon for me. ⚡️
Edit: Just got through it all. Yeah, still highly considering, thanks for putting in the other mods which definitely may be needed.
Appreciate you making it through to the end! I’ve had a blast with this engine, zero regrets 🔥
Are you running the factory transmission and clutch?
Upgraded Clutch - Still somehow getting away with factory trans, going to ride it out until it goes and then upgrade to Baker
What exactly happened to the original motor?
Rode through hell & back and exploded at around 50k miles in a blaze of glory
@@FXDLSBrooklyn hahahaha
@@FXDLSBrooklyn Through Gaza ?
How often do u do the oil change I have a 120st currently n that sucker gets supper hot n burns my oil to the point it needs to be changed every 2-3k miles or so
I try to do it every 2500
I was also surprised how much oil the thing burns up, that's real
LIKE 200
Haha only now watching forgot to watch it earlier,was busy XD
15 January,great day,pay day hehe :P
XD nice thumbnail meme
Getting to work now will watch later
Appreciate you Paul!
Hey mate from OZ..Love that serious weapon you've got there..Very tasteful mods all round👌
I've been watching your vids on and off now for the last 5yrs or so when I get the chance and love seeing how and what others do with the same bike as mine..
Is that the ultracool oil cooler you're running there, and have you had any issues with it? Also have you ever measured the engine temps you're getting it up to on hot days with the cooler on?
Either with your previous 110 or on the 124?
I've got the mini love jugs and they do help a bit but im just deciding which oil cooler im gunna have to go with, because as you know when you start giving it a bit of stick these things start cooking rapidly..
And if i keep going the way im going without an oil cooler i fear its gunna shit itself soon..And this bikes a keeper for me too..TIA👍
I would hands down recommend that Ultra Cools oil cooler - No other issues besides the one I mentioned - With my 110 I was able to get away with a smaller oil cooler and no side fans, the 124 is just a different beast all together - Appreciate you checking it out man, what year is your bike? 🔥
Mines a 17..Thanks Thanks for the reply 👍
Is it a hot running engine like the 103/ 110 harley engines?
Not that I notice, but that's with a cooler, fans, and a proper tune
I'll admit, and I'm not one to humble myself to such humble proclamations...having ridden your Dyna last fall, I haven't quit thinking about "the perfect Dyna."
Unlike you, my starting point to everywhere I ride is not urban clusterfrak that would make me feel like I would be destroying the aluminum and steel cooking me a few inches away, and within ten fast minutes I could be riding on the stretch of road in the country; 1-71 south from Sparta to Louisville Kentucky...(sure Texas and Utah have long stretches of highway, south of Atlanta, 1-80 westbound from the Poconos on Sunday mornings, but 1-71 is aggressive, and you're doing battle with methChallengers, Chromestack tuned Cummins powered dually's, outlaw Porsches and day trucks...) Within a half an hour I can be on Rt.22 which is the Midwestern Isle of Man,...yes a high horsepower light, huge torque Harley fits into my wheelhouse...
Floorboards this time perhaps, expensive suspension, fxrt fairing with taller windshield...
I must not think bad thoughts....
Good looking bike. How would the 124” do with a 5 spd vs 6 spd?
I’ve had a couple people write in with them on earlier models like a 2001 FXDX, and they definitely weren’t complaining
@@FXDLSBrooklyn good to know. I have an 06 Road King that I am looking at going big motor with.
I'll tell ya young brother, my 143 DRAGON was a nightmare to get straight but ok once u figure it out BLAST OFF 😂 168.5 HP 157 T. BUT LONG HAUL N.F.G. Heavy traffic better push the dam thing, LIGHT TO LIGHT OR TRACK, I WIN
That piece of shlt bike would get blown off the road by any kid with a 3k gsxr 750 he bought
@El_Peto Lol. How many kids are riding any sport bike for 10k miles or 10 to 15 hr rides on any sport bike? Not many.. Sport bikes are not designed for long haul riding.. Cruisers are just built different and you ego won't allow to see the difference
@@El_PetoI also have a Busa little boy get Ur junk out im waiting
I have 26,000 miles on my dyna low rider s, I have been thinking really hard lately what direction to go with a motor or rebuild and I think this engine is the way to go, Thanks for the video! There isnt enough content on twin cams these days!
+
I’m more or less trying to figure out if there’s a trans on it or not bc I want one with no trans
You running stock mounts front and rear ? Thanks
Funny question, but with this setup is it throttle by cable or wire? I’m old school, so I love the instant mechanical response of a cable throttle
That's at least 15k... damn man... can't hide money
Is the S&S engine the same as the Harley engine?
What is the Front fairing you're running?
So did you break it in with a break-in tune then get it dyno tuned?
What happened to the factory 110?
😂😂😂
the thumbnail
People wanted a face reveal - They got one.
I recently bought a 2003 FLH. Cheap. 50 k on it. The 88" is just to slow for me. I, like you live in the Northeast, NJ. Do the same kind of riding. Fast is my speed. I was looking at this engine and enjoyed your review of it.
Slow broken down garbage Harley is your speed
Was the whp? I assume so
is the stock gearbox durable for this swap and is chain conversion necessary ?
Honestly the last thing that's holding on is the transmission, which will have to be upgraded at some point - As for the chain, you're going to be breaking belts if you don't do it
@@FXDLSBrooklyn thanks a lot..⭐ it's just.. I dislike chain drive on bikes and I would like belts to resist that engine 😭❤
@@lukaapakidze4250 believe me if I had a choice it’s always going to be belt, but it is what it is
Harley makes poorly engineered cheap garbage bikes and sells them to stupid people who think needing to replace 80% of the bike is just part of the dirt bag biker Harley experience
@@El_Peto
Hmmm,...So you caught your ole lady screwing a Harley rider again... relax, the stretching will shrink back down so you can feel her again.
Don't be mad at the bike it was the rider that did it.
Thanks for sharing
Ive toyed with idea of putting in the S@S T111 crate motor in my Dyna FatBob...Its wouldnt be crazy fast like the 124 but i think with its 2 year warranty and its shorter stroke that runs cooler...It might be a good fit for me as my all round everyday Bike/tourer....
Honestly, that T111 would probably be more than enough - Probably the more realistic option if don't need everything that comes with a 124
@@FXDLSBrooklyn Yes...Iam think it would have plenty of power for a 700lb Dyna and it would very dependable for the long term....Looking for 100K mile plus dependability...
@@bradlozano2571 reliability? Nothing Harley
@@El_Peto Keeping a Harley Stock gives you plenty of reliablity
@@bradlozano2571 that's comical. Would you like the pressed cranks to fail, the cam chain tensioners, sumping, or overheating?
Odd how there is an entire industry to essentially replace everything other than the frame, fuel tank, and wheels bcos Harley makes what Honda would throw in the trash bin.
What year was your s&s 124 buddy?
This.
There is no difference between an hour or a hundred hours, engine-wise. If it makes it an hour, it'll make it a hundred. Engines don't have feelings. :P. Also, I'm not broke but not overloaded with money either. How do you afford taking these "chances" on an engine? Maybe you have endless $$$s. I have a few extra $$$s but not limitless money.
I work really hard so I can play hard, pretty simple formula - Appreciate you checking it out!
Formula One cars would disagree with your expert engineering analysis there
@@El_Peto I don't think cars agree with anything. I've never talked to a car. You're the expert, not me, Jack A.
@@nhzxboi it's called telemetry
Good attempt smart guy
You got to change that s&s air cleaner for the S&S Cycle Gloss Black Stealth Air Stinger Air Cleaner Kit w/Teardrop - 170-0718A
Pretty sure it's the same element. To.
That one just looks terrible
Respectfully disagree - I dig the raw & simple aesthetic of the stealth and haven't had any issues 🏁 ⚡
How you going to tell a man what he should do with HIS BIKE??? You new "bikers" are weird. Go build your bike however you want lame.
So what did the upgrades and mechanic fees set you back in total. I'm seriously considering the 124. Tryna get an idea on price of the upgrade parts.
I need to go back and look because there were other jobs happening including a full overhaul of the brakes - It was a lot though, by far the most expensive job I have ever done given the amount of things that need to be modded in the bike to fit & handle that engine - Any good shop or dealership should be able to give you a quote, let me know how it goes - If it's a bike you know you'll never sell, based off of my experience, I say go for it 🏁 ⚡
You addressed your cooling properly, that’s the key to success. I see so many people resist it. Ride ugly.
Yeah I really did not want to add those fans for aesthetic reasons, but after a few rides in city traffic, there was no other option. I don’t regret it, was an essential upgrade for this build 🔥
@@FXDLSBrooklyn they look fine. They’re my next wanted & needed upgrade.