Harley-Davidson Milwaukee Eight Engine 

Well...I'm still plugging away on my 46 Knuckle....been riding it since 1975....can't complain....

The funnest part of riding this bike is the sound it makes when you twist the throttle. It leaves me with permagrin for about an hour after I get off. It’s an addiction.

I have a 2019 M8 117ci., during a test ride. I noticed a bike ran smoother, cooler and had more power. A big improvement over the twin cam. I am impressed.

I started riding H-D’s as a teen on a ‘72 XLCH and I have to say they’ve really come a long way. This new M8 is my favorite engine by far. No more crank issues and the few issues they had with the engine thanks to the EPA have been addressed. I put over 100k on my TC96 before trading it in and am expecting this M8 to go just as far before a rebuild. We will see.

!0000K in 6 months on my 114 tirglyde...NOT ONE problem..and I ride hard..it pulls like a saturn rocket .. I LOVE this freaking bike...66 yrs old..50 yrs riding experience on all kinds of bikes

I really like my M8 107. Only had it about a month and a half but Im already hooked on it...

I just come back home from a trip to Colorado. I rented a a FLHTCU with a 107 m8. Loved it. It did everything I expected and more, got 48.9 mpg. Transmission made more noise than I thought it should make. Lot of gear whining. Overall l want one

I just picked up a 17' road king with the 107. I love it. I had a dyna, vrod, and then 883. This is my favorite so far. Great bike

I like how Harley eliminated all vibration. I used to own old Harley's and from my expirence those bikes were wrenched on alot due to over excessive vibration

Awesome vid, thanks! I traded my 08 kick-ass blacked out springer with 16" apes which I still love btw, for a 19 Ultra Limited (YES, I'm getting old) and it was the best thing I ever did, no regrets. I cruise at 80, tunes cranking and hear them perfectly with extreme comfort and enough power to twist it and pass whoever I need to. I looked at Indian, BMW, etc. but just love the style of a HD better...

Been riding Harleys since 1972. In the old days we didn’t buy bikes, we built them. Brought home my first Panhead in boxes. Had sportsters, pans, shovels, and twin cam. Just bought 2020 Breakout in Stiletto red. Best bike I’ve ever owned, blows all the others away. Most problems with engines can be traced back to the loose nuts behind the handlebars!

The m8 114 has a serious issue with the valves leaking. Oil goes into top of pistons and glazed bores at only 100 miles!! Beware of blue smoke on cold start! That’s the first sign

Thanks a lot for this nice video! I just bought a 2019 road glide 107ci and its a huge improvement over the 103ci Ultra Limited I had before. One thing you didn’t mention in your video is the primary drive on the M8 is much smoother than the twin cam bikes especially at low speed in second gear. It also seems like the primary chain case is narrower on the M8 than the twin cam but that might be my imagination. I’ve been riding 25 years, all kinds of bikes...Honda, Triumph, Yamaha, Harley...I’m very happy with my new M8.

I have a 2018 SE CVO using about 1 qt of oil every 5,000 miles. Factory said it's normal. Never had a HD using oil. Thing about applying the lemon law.

72,000kms on my 2018 FLTRU M8, Not one problem with it...LOVE IT.

I just rode a 2016 dyna twin cam 103 with a stage 1 yesterday, followed by a 2018 slim, M8 107 with slip ons, and the power difference between those two bikes back to back was 🤯💥🇺🇸 drastic comes to mind. The entire ride quality, handling, feel, shifting, literally everything about the M8 slim was far superior to the twin cam dyna. I say that but I still wanted the dyna more! Go figure? It rumbled and shook, and sounded like an angry beast and I loved it!! Then I rode a ‘21 FXLRS with the 114, stock, left over from last year and I bought it!! Amazing bike in every way. IMO whatever that’s worth?

this was excellent man. I have the heritage 114 and very happy with it. I cant imagine someone not liking it. good job on the presentation.

I kind of like the idea off no vibration they should give folks the option.

This engine impresses me everytime I ride. Good vid as always

The last bike I had was an ‘89 Yamaha VMax I sold in 96 or so. I moved to Florida and decided to get back into riding again. I’ve always wanted a Harley and have ridden a few of my friends and family members’ throughout the years and liked them. I bought an Iron 883 in January and three weeks later, I traded it for a Low Rider. One thing I noticed immediately was the lack of vibration relatively speaking and a nice amount of torque all the way through the power band. I’m really happy with it and have enjoyed having any excuse to ride it.

Awesome and well worded video . My 2018 FXLR Low Rider is the best I’ve ever had . ( I’ve owned 13 H-D’s in 43 years ; oldest was a 53’ FL panhead ) I do believe this is Milwaukee’s best effort - with only (2) complaints . 1.) I don’t agree with the placement of the factory installed oil cooler . This was a great addition to the engine , however it totally blocks the “ clean air “ to the front cylinder . I do believe that , like some aftermarket oil coolers on the market , it could have been catching its own clean air off to the left of the frame’s front down tube . This would have allowed the front cylinder to continue to receive its clean air as it always has . 2.) the brakes , although “ better “ , are very inconsistently set up . I have spoken to many a riders of this new softail . They ALL agree that the front brakes are too sensitive , and most men agree that two fingers is the safer and more common way that they apply them . The rear brakes require that you use unnecessary application from your right boot to get the bike to slow / stop . When speaking to my trusted dealership that I have frequented since 1988 ; they explained that the “ engineering department “ at H-D did this intentionally to encourage the use of “ more front brake “ . I shook my head and wondered why they couldn’t let the novice rider learn to ride and not dumb down the pressure required for the rest of us . Also I would have liked to hear more about the M-8’s compression release described and perhaps seen the inside parts and how it works in this very informative video . Thanks for this job well done .

Love my '17 RK. Awesome power, and super easy riding.

Nine yrs ago I bought my first harley a 13 hertiage which I still have just flipped to 100000 and still going but a year ago bought a 18 ultra and OMG I love the bike I tell people it's my quiet bike and the hertiage is my loud one

Sweet video. I love seeing the M8's go together at the factory. Thanks Block !!

got a new 17 ultra c.2 weeks ago with 5400 miles on it with the 107 she just bad ass nothing bad to say at all

Just came here to see about pushrods. My 2000 SUZUKI VL1500 has an internal chain to operate upper mechanics and 4 valves too. HD lagging 😄

Dual spark plugs and four valves per cylinder which have been used on metric bikes for 25 years now. Everyone is raving about this engine but it’s old news to many of us.

Traded in my 06 Fat boy and 15 Street Glide Special on 19 Tri Glide 114 cc. The reduction in heat is the best. More torque and power. HD did their home work. This Milwaukee 8 is the best yet. Continually surprise the cagers at how quick I leave the light. Takes a little time to get use to the trike after 49 years on two wheels. Never took to my 08 Electra Glide Ultra. Couldn't get past the heat and the height center of gravity with a rider and the tour pack loaded.

Thanks for this information I am trying to learn everything I can to apply for a job with Harley Davidson

I love mine it is way better than the twin cam on back. I still own a EVO but this bike will run circles around it, best Harley I have ever owned out of several from Panhead on. I have a 2017 Ultra Limited

Bought the M8 lowrider. changed the stock seat because it's crap,put on V&H slipons. sounds great,drives good,rear brake isn't up to much.very happy with it other than that.

My stock 2019 107 roadking STANDARD is a torque monster with 35 yrs.of riding everything with 2 wheels it is smooth.(I had other enthusiasts walk up to my bike and place their hands next to my cylinders ,,after 150 mile ride and say how cool my motor was,,,they knew more about my engine than eye did ,,,until now ,,,after watching your content.thanks !!!--Happy Trails ya,ll-!!!☆☆☆

I do not need any more power or speed, i,ll keep my dependable 2000, 88 cid....it has a few upgrades and is dependable.

Just traded my 2000 Road King on a Softtail Slim, Been riding Road Kings and "King of the highway ( shovel road king predecessor) forever I need a lighter and lower bike 5'5" 67 yrs, love it a million

It took a little time for me to adjust to this motor, but it’s like I like it more and more every time I ride it. I went from 2015 SGS (103ci) to a 2017 Road King Special 107ci , and I love it.

Sounds like with the new oil cooled heads, this new design for them might be the primary cause for oil sumping which is an issue the can't seem to correct with what now, 8 new/replacement oil pumps?

Its a tremendous engine, homerun hd!

At time 4:08 he said Harley was asking people what they wanted to see in a new engine, wow! that's is easy . An engine that doesn't need fixing after buying it or a warranty that covers it not ... pay us and will fix it.

Just got a 2017 FLHP after riding a 2001 FXDXT for many years and I can say the 107ci is heads and shoulders above the old Cam 88... I gave my FXDXT to my son and he's rebuilding it to his liking down in Tx and hoping to meet up with him half way on the way to Sturgis next year,,,

I have the m8 stage 2 / 465 cam, its really fun to ride...

Almost 100k subscribers bro! Damn what a year. I remember when I joined before you started upgrading the 883 and I figured you would blow up, but this fast is Awesome. Good for you man! I predict 1 million subscribers by this time next year..... mark it down😁👍🇺🇸

Do a video on the Street lineup or the Revolution X engine, the Street Rod is probably the only note worthy bike out of the lineup with a dual throttle body, hemi piston heads, upgraded fuel injectors and upgraded cams. The revolution x engine in the street Rod is also liquid cooled, and no counter balancers, so you can redline at 9000 RPM and feel every bit of it, in my opinion, it’s an absolutely amazing bike, only 750 CC 64 cubic in, but stock it has 18% more hp and 8% torque over the normal 750 cc revolution x engine that’s in the Street 750. I ran a low 13 sec 1/4 mile on it with pump gas and stock muffler and air intake, yes I said low 13 STOCK, my buddy has a S&S 114 cubic in engine in his road king and he runs 11s

I'm feeling better and better about my 103 HO stage 2. Hauls me around pretty well.

You forgot to mention while idle in high temps the rear cylinder shuts off

If you own a M8 like my 2018 Fatbob, 2017 and 2019 CVOs don't waste money on Harley stage kits. The engine will blow up due to oil pump design flaws and/or plastic tappet guides. Yeah and $50k motorcycle with plastic tappet guides. Neither the dealer who installs it or H corp office will disclose this. S&S, Fueling or Zipper all make higher quality performance kits.

Love my 2019 RG Ultra 114, lot different than 110 CVO , definitely runs cooler and much more responsive. 😎

So...10% more torque from a 4% bigger engine? Eh...not to excited about that. But I do like that they have finally gotten on board with cooling and the 4 valve 2 spark plug heads...my 00 vulcan has those and it makes a big difference.

I gotta compliment you on reading the spec sheet accurately, but nearly every reviewer talks about the increase in HP and torque at RPM. Just talking numbers doesn't tell the story of the M8 performance. What makes the M8 impressive is the fact that it achieves approx. 90% torque output at 2100 RPM, and sustains that level past 4000 RPM. The torque curve on this motor is high and flat, check out a dyno run chart, not just the numbers.

I have a 23 fxst with 107. Love it

Pan head still runs just fine thanks! neat motor though, bet it has a ton of power ! these have the be the loudest Harley engines ever ! how ' bout building them entirely here using only American steel and American Workers Like Knucks and Pans were made! Make America Great Again indeed ....

Good video man. Upgraded from my 08 Fatbob with a Fuel Moto 107 kit, to a 2018 SGS. The new engine stock, is better in almost everyway than my old bike. Now I just gotta find some good slip ons and I'll be set for awhile.

I did a stage 2 and absolutely luv it

How are they for reliability? Seems like finned valve covers would take some heat. Separate high volume jets of oil sprayed to piston pin area helps to transfer heat to oil cooler radiator. Top quality gaskets are essential to survive heat cooling cycles. Uneven heat dissipation stresses mating surfaces. Keeping rear cylinder exhaust valves cool is always a challenge. Exposed to white hot heat for hours on end that heat has to be removed or engine melting becomes a clear danger. Air cooled engines don’t like to idle in bumper to bumper traffic in desert heat they need air flow so a separate fan would be needed in this application. More oil and efficient cooling radiator is the way to go. Two systems, lubrication, cooling makes for a happy motor. Proper octane fuels help to deliver power not just heat. The more horses neath you the more heat as well. Low stress engines last longer. Two hundred degree engines are happy. 😄Five hundred degree engines say I’m out of here dude!🥵

I got the stage 2 and torque cam and it's very impressive...

Just bought my first HD, 2021 Low Rider S. Really stoked about it, hopefully I made a good decision.

I bought a 2018 Ultra Limited 107 earlier this year after about 500 miles a defect in the case showed its ugly head oil started weeping out of the side of the casing. Dealer has it now for two weeks till they send a new case and they rebuild the motor. The whole thing is warranted but what the hell brand new bike. I was loving the bike yes less heat nice ride but now I’m not to happy.

Ride what you can afford some people just can’t afford much LOL

Absolutely love my '19 Heritage 107. Dealer wanted it back, marketing ploy- IDK. I responded what, why? I absolutely love this bike - NO... Not a word since. I've owned many and rode many, but of all I absolutely love this bike...

I love this New engine and the old others one

I've heard guys say if u decat them they run much cooler...

This is a pretty good copy of the Yamaha 113 Stratoliner motor from 2006. Way to go HD!!

Finally 4 valves per cylinder getting in the game with all the metrics

I’m upgrading my 107, to a 124. It’s gon be a beast!

Don’t forget in the 107 oil transfers issue !! Mine is at Harley waiting for vent kit for Harley under warranty !!

Has Harley been quick to fix the defective composite cylinder head gasket?

Just got a brand new (even though it’s a 2018 model) Road King 107 for a work bike and I’m hoping for the best. My personal bikes are a 95 FLHT Electra Glide Standard with the Evo and a 83 FXSB Lowrider with the Shovelhead. I always loved the sound and coolness of the Shovel and the absolutely bulletproof reliability of the Evo. Not that I care too much about reliability with the M8 since we have a dedicated, full-time mechanic to work on the bikes. But, I also don’t want to have a shop queen either. So far the guys that already have them like them, especially since they have hydraulic clutches.

So cool going back and watching your old videos and seeing the progress in steps. Gives me some inspiration and great entertainment

I checked the fuel mileage on a 107 M8 Softail Standard and it was 54 mpg! That's about the same as a 1200cc carbureted Sportster.

The HD dream engine for me would be shape and size like Knucklehead with around 61-74 ci with 120+ horse power. I'm not a speed hunger but 77hp from 107ci was too pathetic, and all of the power on a 700lbs you couldn't outrun ktm390 or ninja400.

Good job! I knew the stats but the engine video clips are super cool!

Softails have dual counterbalancers, that’s why they are a little down on power compared to the touring bikes. The 114 in the tour bikes puts out 122 ft lb of torque vs 119 ft lb in the Softail, the 107’s are the same way.

It's amazing Harley spent all this money into r&d (at least what they claim as an excuse for their prices) but yet the m8 has all kinds of problems. They just came out with an improved oil filter as well as a vented oil tank cap by fueling because their umbrella valves suck.

Until HD does away with their chain primary I'll just stick with my Shovel with S&S carb,belt drive primary and 5-speed trans set up.

Harley...reinventing the wheel.

I'll keep my Evo thank you...

Wow if Harley could make another 20 hp , they would be making almost as much power as a 1969 Honda 750cc

I like them. I just won’t ever get one due to the simple fact that I can’t work on it myself without a fancy (expensive) computer. I’ll keep my old evo or even a carbureted twin cam some day.

Wow, this is nostalgia as its finest, Block. Just out of curiosity,.... which one of those beauties did you take your name-sake from @0:25 ??

Great video Block. Very informative for us not HD riders.

Still love my 1998 evo

Why not 8 valves along time ago ???- Especially the sportster which still does not have 8 valves ???

I have seen evidence of the M8 heads made cheap by some foreign manufacturer. The machine work is not the greatest and the heads look like Kawasaki may be the ones making the heads. I watched a noted machinist rebuild a set of M8 heads that had less then ten thousand miles. Valve seats were poor quality and the ports were really rough. I ride a 2010 Heritage and will stick with it. I believe the best engine HD ever made but did not have the power the new ones have is the Evo

Amazon, how do they get so little HP out of such a huge engine?

I know it's been 4 years, but the combustion chamber design is called Pentroof, vs the previous HEMI design. Basically every car in existence today uses Pentroof because it's cheap and easy to make them have more than 2 valves per combustion chamber. HEMI heads are harder to make and basically impossible to run 4 valves per head. Although, I would argue that 4 valves is a waste, especially in Harleys. 4 valves only lend themselves to high RPM. They lose low end torque.

75% less shake? I have a 1997 sportster mounted on the frame with no rubber. That's what I would like them to bring back.

I really luv that engine.

Good to see harley going in the right direction

Definitely a great work by Harley Davidson. Reducing the shake and heat is probably the best thing that the new engine offers. My brother has a Dyna Wide Glide 2013, and even during a good weather (22°c - 28°c), he sometimes can't stand the heat of the engine. But I'm mostly interested in the new FXDR. Is it going to be the V Rod replacement? Or is it a V Rod wanna be? Can't wait till you review it Blockhead.

very informative, thank you, good job

Very nice video. I still like the Pan generator bottom and the Shovel top, or a mid seventies Ironhead Sportster. My ‘05 TwinCam Springer seems like about as new as I need to go.

I don’t know if I should get the new softtail low rider with the M8 it’s scaring me a little because it’s still new and everyone I talk to they say they got a lot of issues with them. I’m looking at 2019 low rider got 2 miles on it the dealer is asking 16,400

o my god still air cooled still 30 years behind

Still surprised by all the Harley hate. I've had Suzuki, Yamaha, Honda all were good. Kids bought me a 2018 low rider. Comparing air cooled to air cooled harley is just as quick if not quicker Definitely easier to hop up. I prefer the Harley. The others never brought 50 mpg plus. Just like politics, no one can just leave people alone .

Love your videos and hopefully I'll be able to jump from my 883 to an m8, was blown away by the fxdr..but the price though..

Please make a video about the m8 problems

A HD with 2 cylinders. Good to know

I really like my 2017 M8. Maxwell should get the Heritage and do the stage iv kit. Check out Matt Laidlaws video on his Head tech's bike. Nicely modded out. So I would say 100,000 subs is not far off . Nice!!

hey, every HD engine from the first one to the last one yesterday are oil cooled. Some of the M-8 engines are liquid cooled along with air and oil cooling. My brand new Tri Glide is cooled by all three and it will still cook your ass in slow traffic.

I'm lte on this video but I have a 2015 CVO Ultra with 110 and my buddy just got a '20 with the M8 and some differences, he can go about 110KM (70 miles) further on a tank of fuel. The power is nothing we are almost identical but fuel milage is critical, hated having to stop for fuel as I am on reserve and he could go another hour.

Harley Davidson did'nt do a game changing change, they just came up to what everyone else was doing with a 8 valve engine and counter balancing. One more thing harley needs to do from a maintenance stand point is to get rid of the chain primary.