80,000 MILES and KNOCKING! - Milwaukee 8 Engine Tear Down - Kevin Baxter - Pro Twin Performance
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- Опубліковано 5 лип 2024
- This Harley Milwaukee 8 has 80,000 miles on it and started KNOCKING. Lets tear down this M8 and see why this Harley engine noise got BAD! Part 5 of a series where we tear down and inspect 8 different Twin Cam and M8 engines discuss their builds and compare components of each.
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Pro Twin Performance and Baxter's Garage
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Winder, GA 30680
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This man needs a cable tv series. Very well spoken and detailed,hell I wanna buy a few motors ant tear them down myself.
Why? His already on screen.
Cable is garbage by nature. UA-cam is fine. To make money on cable one has to pander to idiots/non-mechanics. Better to have videos wrenches can enjoy and everyone else can go fap to Kardashians or whatever.
I’ve been dealing with HD’s since the 1970’s …
Panheads , shovel heads , etc .
This is probably the MOST - well worded , awesome, and detailed presentation I’ve EVER SEEN !!!
Thanks - I’m a subscriber now !
Someone else said this and I concur - why doesn’t this dude have a cable tv channel? This was outstanding! Gonna be watching some more. KUDOS!
Ya Kevin needs to start the Speed Channel again and put his Baxters Garage twist on it....Saturday mornings,,,
Great video! And I'm glad some folks just rebuild their engines at 80k and not selling the bike the get a new one.
I said exactly what you wrote before I seen it. Ive spent to much time and money on my bikes just to sell them for a new one every 4-5 years.
Things are not what they used to be .006" runout on older bikes would be criminal.i think harley say up to +.012" is acceptable.If someone with a shovel pan knuckle or flattie had that i would say they need new flywheels..Also 80 000 miles is not a long life from an engine if its well maintained and not beaten up on as this one certainly was not!!! Things are not what they used to be.Company went backwards in engines from end of evo era. Having said that the clientele that harley attracts now seem to have little respect for what is still an agricultural design.(Thats why we love em!)and 4 some reason think its fun to beat up on them.The big twin flatties in my opinion are the best bikes harley EVER made.Built even half decent they last near forever.
I like the "Sped up" style of editing as opposed to the "cut and paste" style. Nothing is missed!
I agree! It doesn't get boring that way! N.W. Ga. here!
WELL SAID , I agree totally !
80k and needing a rebuild. I'd be unbelievably pissed if I spent 20k+ on a bike and it crapped out at that low mileage. Great video though. Liked the step by step disassembly.
Alot of guys tear them down way before 50k. The heat kills everything. They should have fans on them. I have a 2012 streetglide with nearly 70k. Replaced everything in the cam chest at 56k. Put in nice cams and now has 98.7 h.p. and 116 ftlbs of tourque. What a jump in power. Top end was not touched. Still doesn't use much oil. Maybe 1/2 quart between 3k oci
The way he explains everything, even a non-gearhead can understand. Great content and great channel, as always. This guy is a damn pro.
Man l wish l was an apprentice working under yourself Kevin. I just learnt so much in 25 mins. Always enjoy watching you work. Greetings from Melbourne Australia 👍👍👍
Very nice job!
I love that you don’t make us wait through bolt removal but high speed thru it. Comments and possibilities are simple direct and to the point!!
I love this guy. Really want to know what's going on inside my 117. Being a VStrom guy for years, this is all new territory. The only man's videos I watch from beginning to end. Super gifted individual that's unpretentious. Fascinating.
Your videos are always really good Kevin. Thanks. I have an 03, 1200 Sporty with 75K miles on it and a 2012 Dyna Superglide with 112K miles on it. Miles I put on the bikes. Both run like sewing machines. Never a wrench to the motor on either bike. I watch 2LaneLife alot. Those guys run M8's and run pretty hard. 85mph plus on Interstates. Ride 2-up and lots of luggage. Their bikes do very well. I'm impressed.
Glad your Dyna is happy. Mine is a '13 with only 45,000, hope I get at least your miles.
This guy is a “real”. Engineer👍
thank you sir.
I have an Evo with over 100,000 miles on it. Never been apart. Last of the reliable, easy to work on Harley motors.
@Thomas B While no bike engine is hard to work on the garbage timing chest nonsense (purely to facilitate semi-automated engine assembly, see factory videos) HD inflicted on customers was only to save the MoCo a few dollars in assembly labor. HD stopped being a "premium" quality engine when Evo ended (and those had their share of problems).
This is my first time here and I'm really impressed with your show, the way you point things out and detail everything. I'm looking for another Harley but I haven't found one yet. I'm going to sub, leave a thumbs up, and a tap on the bell, I hope to get to know more about the great bikes. Thanks for sharing.
The way you explain things is easy to understand, thank you and keep em coming !
Thanks Kevin for this video and the great info as usual. My 17 M8 is just turning 37k miles. This guy was really doing some riding. It's awesome that he got 80k on his. Unfortunately, unable to make Sturgis, but will be heading west for work that week. Stay safe.
Thank you sir. And this isnt his only bike....he rides like crazy.
Phil Steiner's 8 year old Gold Wing had over 770k on it under Honda warranty when he upgraded to a new one.
I don't know, I have 60K on my old dyna. It just seems like with the 'future engine', 80K isn't a lot of miles.
Awesome video. Just did a twin cam that seem to fit the same symptoms and found the same problems in the front cylinder and crank. Would love to work and learn in your shop. Your knowledge in these videos is really inspiring for this crazy Canuck.
A good mechanic can go by feel, sight, and smell. He surely does this.
I know it's summer and I should wait till winter to view all these new videos, but when I read the title I could not wait. As usual It was worth the loss of a half hours sleep. Thanks for another great video. Mike from Maryland
Excellent tear down Kevin. Very interesting, I am leaning lots. Don't worry about not getting videos out, customers pay the bills. We will all be here when you have the time to post. Keep up the great work, take care. Cheers
Right on. Thank you sir!
Great video Kevin. Once again without all the bullshit. you get right to the heart of f the problem diagnosing every step of the way without taking an hour to do it. Good stuff brother!
It was cool watching you tear this down and give the descriptions of what you were seeing. Excellent job!!
That being said, 80,000 miles? That's the break-in period on my Goldwing.
Probably due to it being a vtwin and the vibrations. The goldwings 6 cylinder is super smooth
Honda lifespan>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>Harley lifespan.
I'm a Harley rider but l must admit the Goldwing is the BEST touring bike out there...but you really can't compare the 2 motors....different animals
Frankly I am appalled that such a brand new motor would go out with 80,000 miles on it my last Beamer had half a million on it before the car took it out I have a half a million miles on my Triumph TR6 that I've had for 40 years I have a 99 Sportster 883 that has 350 thousand miles on it engine runs good my Ural sidecar outfit at 40,000 miles and I put on it in the six years that I've had it it was number three out of the four bikes that I had on the road for many years now that I am not working I'm retired I don't need to have spare motorcycles to make sure I get to work I'm sure I will be able to have many more miles on my you're all I've just done basic maintenance to it the two-piece driveshaft kid, part no Harley Shop with touch it even though it was a simple job so I had to do it myself with the owner's manual some help from the dealer on the phone and my buddies garage around the corner from my house Easter morning the cylinder broke from the base on the way to services bought a new cylinder piston rings gaskets and seals and just put it back together and it's fine and dandy Harley's last good motor with the Evolution motor the Evolution motor powered Sportster is there a most reliable bike probably why it's discontinued you would think on a big twin that cost so bloody much that the motor would last forever but then it's not an airhead BMW
Hi Kevin, I’ve been missing you for a spell. I realize you have a lot work going on. I’m close to 79 years old and the intense heat is knocking me down a bit. Plus a very low heart rate in the 40’s and 50’s!! Take care of your health and be careful at Sturges👍🤠
Thank you sir.
Mitchell take care of yourself brother we will keep you in our prayers. Sincerely, Kevin and Julia Shelton.😎❤👍🏻
Great video thanks so much for posting Harley got here but have to tell it like it is in some brands 80,000 is not that many miles
Hi Kevin, be safe and have fun at Sturgis. I wish I could be there but still recovering after surgery in June. I enjoyed this tear down and hope to send mine too you soon. Thank you!
all the best with your continued recovery. thank you sir! see you then!
Nicely done video. You make these engine tear downs very interesting. Thanks for doing the videos. .
Thanks Kevin! Have a safe trip.
thank you sir
Thanks Kevin for another great educational video. And perfect for me because I ride a 2018 107 myself. But mine is all original with a little over 10 and a half thousand miles on it. I learned from one of your other videos to check if I have an engine sumping issue by removing my bearing sensor and measuring the oil that drains. I only got about 2 and a half ounces out of it so I feel safe assuming I have no sumping issue so far.
U got information and I like the tear downs it's always good to see it first thank you keep it up
Great to have you back!! Know your busy...that time of the year...
Thank you sir. It's the season for sure.
Good find on the bad area. Like watching your videos.
Great Content! In solving the noise mystery🍻🤙🏼
I wish I could put in a few days as your shadow in the shop during these breakdowns, good stuff my brother 👍🏻
I enjoyed every second of that. Great vid, thanks.
This was interesting to watch...thanks for sharing your expertise !
More great info Kevin! Thanks!
Thank you for the excellent videos Kevin!
My pleasure!. Thank you!
Thanks Kev, its good to see ya again...
thank you jo. good to be back.
Great video and good explanation.
I don't understand why he keeps emphasizing that 80,000 miles is a lot of miles?? That's nothing for mileage.
That's only 128,000km
One of my bikes is a 1991 Goldwing GL1500 SE that has 240,000 km which is about 150,000 miles and I've done nothing to it. I haven't touched the motor, tranny or clutch. Only wearable items.
I would be pissed if I bought a motorcycle and had to rebuild the motor at only 80,000 miles.
IMHO, The motor and tranny on a motorcycle should last 300,000 miles or 500,000km before you even have to think of touching the motor or tranny.
HD makes money selling a $45,000 touring bike in Canada and then rebuilding the motor every 3-4 years.
Keep up the great videos
I totally agree with you. That is why I sold all my Harleys.
👍
I thought the same thing......80,000 miles is just broken in for a Goldwing. They can go 300,000 miles if properly cared for.
My xs 1100 1978 did 150 000 plus choper i also had a side car outfit 100 000 plus did rebore that i ran it from spain on 3cylinders not recomended uk biker
Always helpful Kevin thanks. Have fun in SD, be safe.
80k on a modern production engine with a knock is pretty poor reliability. I just sold a 76 Guzzi LeMans 1 with 140k miles and the lower end was perfect. One piston melted due to poor fueling but was the worst of it. Replaced one valve as it was bent. That’s it. This on a 45 year old bike.
It also depends how the bike was ridden. 80k hard miles is more wear than 140k easy miles
@@DirtRidingLarry the LeMans was one of the fastest sport bike of its time. It was ridden as it should have been as I know the previous owner. Poor engineering is just that. I cant comment on the Harley usage as I don’t have the history but 80k miles on a modern engine is poor reliability. Also in the video it is mentioned the bike has been taken care of and not abused.
Harleys are junk. They refuse to innovate bc the old heads think technology is scary.
80k on a Harley is pretty impressive, they usually blow up after 40k
I agree. My BMW is approaching 100,000 miles and runs better than ever. The K1200 engine is known to run 200,000+ with ease. 80,000 is break-in mileage on a modern engine. Unfortunately, chooses to build their current engines using 100 year old designs. Putting two large air cooled cylinders one behind the other is a recipe to cook the rear cylinder just as we see here. That is an unfortunate design decision, but it is what Harley chose to do so Harley owners simply have to live with short engine life to get the look and feel they desire. That is their choice and I am fine with that, but I choose a modern liquid cooled engine that avoids these problems and will run 200 to 300,000 miles with ease. Different strokes for different folks.
Another great info and experience laden video Kevin. To be able to shadow you for a month would be worth it's weight in gold!
I've got a Honda VTX 1300 with about 80,000 miles on it. It's still running really well. I bought another motor like it from a wrecked bike with 19,000 miles for 500 dollars and put it in my shop. I don't know if I will ever need it but I have it just in case. If my motor ever wears out all I have to do is unbolt the motor and pull it out and bolt in the other one. I got my bike on sale brand new in 2009 for 7,500. That's good value.
Always love watching your videos. Very interesting and informative.
Wow ! Very well done , thanks Kevin , I'm a fan .
Kevin loved the tear down please show the build you do on this thanks
im not impressed either...but its not as bad as some ive seen with much lower miles. None has been spent other than cam plate and pump.
Are there more "robust" connecting-rod races out there?
Im 67 been rebuilding various motorcycle engines all my life..would like you
to continue a on this engine in detail an find sumise why this happened. I argue that careful assembly ,balance ,tuning and mantainence along with none abuse will give all round better service than adding after market parts. To me after market parts may attract short term performance gains but lack accountability and factory condition testing for longlivity.
Geez. 80k miles. And issues already.
It looks like the hot spot on the cylinder was on the spark plug side. With a worn rod bearing the power stroke probably caused the piston to tilt sideways creating excessive friction and noise. 🤷♂️
Hope to see my high mileage Twin Cam made famous in a few years. I should have 150,000 miles by the end of next season. Then skunkity, skunk, skunk it!
I want to hear all about this bike. And I will surely be watching for the Skunkerize for sure.
What year Twin Cam??
Might be a dumb question, but what does skunking mean? Lol
@@jonnymac8925 Kevin's garage has a program called skunkworks. They rebuild the engine however the customer wants it. IE high performance or longevity
Ahh man I've missed your vids. Glad for a new one
Thanks Chuck!
Good to see your back , great video thanks for teaching us. Also took your advice on legend fork springs love it thanks again..
youre welcome! Thank you!
Very interesting! Thanks for doing this video!
Super interesting, big thanks Kevin!!!
thank you Tom!
Love you videos and the fact that you share your knowledge!
80,000 mile and it's shot? My Gold Wing wasn't even broken it at 80,000!
(No one cares about your goldwing)
115,000 on my wing. Friend has over 600,000 on his 02.
To everyone in the comments yes this guy is a good mechanic explains what’s going on very well but 80,000 miles is NOT a lot of miles
Harley Davidson should be embarrassed by this
Thank you Kevin and Gods blessings for you all and be safe going to Sturges
Great job Kevin 👍😎
thank you!
Tear down should be hands free. Just let the engine run and it’ll vibrate itself apart.👍🏼
Most sensible comment I've seen
Kevin I really enjoy your videos and thanks to you, I have learned a great deal about my own motor.
If you are interested, I would like to see a video from you about riding practices that are good for the longevity of a Harley motor as well as those that might cause premature deterioration. This could include shifting rpms and how that can affect compensators; how cruising rpms affect engine heat and cylinder head pressures; fuel choices including ethanol and it's effects.
With your knowledge and experience, I am certain that your comments would be very helpful to your subscribers.
I'd love to hear this also.
Yup… interested here too
Great to see you again.
Thank you sir.
Glad you got to the bottem of this mystery!
This was a really well done video. Many thanks for posting this, it was really informative. It was awesome to see the four valve heads. I wonder if there a heads like that for my old 88 twin cam.
Considering the high lift cam and the high mileage in a short time span, I'm suspecting the owner frequently has wide open throttle bursts and if he cannot find ethanol free gas, the ethanol is causing some of the problems you are seeing in the cylinder. Ethanol introduces extra oxygen directly to the cylinder which can raise the temperature of combustion.
Some of that crud on top the pistons might be due to the oil re-circulation system that puts oil vapor into the intake if he didn't install a vent bi-pass system.
I'm glad he caught the noise in time to prevent a catastrophic failure.
My 2000 twin cam 88 now has 88,000 miles but for the most part, those have been leisurely miles. Plus I use Amsoil full synthetic and change it at 5,000 miles. I watch for ethanol free gas. It has only had ethanol for about four tank fulls. My engine is as quiet as a friends identical engine with only 15,000 miles. I had the dealer install a screaming eagle vent system before I bought the bike new. So it has not had oil vapor being introduced at the air filter. But that might explain why the back wheel gets cruddy so easily. LOL
Outstanding Kevin 🤘⚡️🤘✨
Great job again showing telling about them motorcycle motors , keep up the good work have a great day and see ya next time see ya bye.
Great content. Thanks for the education.
loved this vid. Thanks for the good explanation!
Greetings Kevin, I'm glad the videos are back, and I look forward to meeting you on Monday, August 16th. I just received a phone call from the shipper and my trike has arrived at your shop!
Thank you sir! That is correct. Calling you shortly.
Hello Kevin, thank you for contacting me and checking the trike out. I do hope you can meet me at your shop on Monday the 16th to discuss the build (I have a lot to talk with you about!).
Excellent narrative! Thanks
I learned lot of things....thanks you very much!
This channel is mandatory for all garage Harley mechanics.
Reminds me of watching bill nye when I was a kid. 🤙🏽
Im wondering if the after market oil pump overperformed the standard lubrication system..eg overode oil passage capacity with leakage at hot spots. This is a common phenomen in older 2 stroke designs. Con rod drillings being over pressurised excuding oil from piston gudgeons.
as always great video for guys to learn
I don't know, seems like HD has made a turn back to the AMF days when quality didn't matter. I own 3 of them with the latest one costing almost 50K out the door. Now I have to worry about it blowing up because it seems like it wasn't designed correctly and tested thoroughly enough before the dealer accepted the 50K. Well, I guess they keep people who do care employed, like you, but damn! Thank God I have a lifetime power train warranty on it! Keep up the great work 👍
thanks John
If you remember 99-2005 the twin am was having all sorts of problems as well. It happens with every new engine they put out. No different with the m8 sadly
I trust my 100 hp shovelhead to take me anywhere. It scares me to take my pos twin cam 10 miles from home.
You don't have to rebuild them. You can run them til they grenade. Everything is a wear item at some point. We are spoiled today with how long engines last. In the 70s by the time you paid off a vehicle in 4 years it was junk. Now they can easily last 20 years. I agree that harley could build them better. The heat issue is a big problem. My 12' came with a oil cooler so maybe that helped mine survive. I really want to put fans on the jugs. These summers are so hot and getting in traffic is a killer.
Magnífico trabajo. Muchas gracias por sus vídeos. Gran saludo desde España. Olé😉 maestro !!!
Great video thanks, I have 40k on my 2019 sport glide softial so I will keep an eye out for it
Great info Thx for sharing.
Awesome video!
Excellent job. Very interesting. I doubt that I will ever get that amount of milage on my 2017 Street Glide. But good to know.
ive been here watching for hours now... and that's something
Hey Kevin love your work. I just bought a 2021 fatboy with the 114 m8. Just put 300 k's on it and it has zero oil on the dip stick. Oil was just over half way when cold. Checked when I got home from a ride and no oil. Does puff out a bit of blue smoke when you start it then it's fine. Any ideas why the oil would disappear so quickly? It only has 17,625 k's on it and it runs fine.
80k miles? That's the first scheduled oil change for a Goldwing.
Honda Civicwing.
i change my oil every 20 or 30 thousand miles,if it needs it or not
@@omarsalgado9715 wait I didn't know Honda Civic had flat 6 cylinder engine since when 😂
I had over 300,000 on a Goldwing before I sold it.
Who ares. The Wing goes and goes.
I have a 2006 roadking and has never been torn down and it has 91,000 miles.Runs like new!
I have a HD 2003 Softail Classic FLSTC. Does it matter what gear my bike is in when I'm doing a clutch adjustment?
Great information.My question is in a better choice to rebuild that motor or would out be a better choice to just buy a new motor.After all the cost for parts and labor.Is it a better option to get it rebuilt or just replace with a new crate motor enstead.
I chose having Kevin do my engine with expectations of having a better finished product than new H-D. Harley has very loose build specs that won’t last as long as a blueprinted engine. Harley has my other M8 apart for warranty engine work at 20 k miles. Bad pistons and cylinders
As always an enjoyable and educational vid... Cheers.
Great to see you again been missing you bad!!!!!!
been missing it too bud. thank you !
I want to see the cases split and the rods removed, the rod bearings and races themselves and the crank pin. Is there going to be a follow up and reassembly shown on this M8 V Twin engine?
I'd suspect the engine has been run low on oil, excessive traffic slow riding/idling (think Myrtle Beach main drag traffic), or excessive rpms or a combo of several or all? Might be time for H-D to think about piston oil squirters? You need to check out the oil pump very good too.
Thank you , I have a 2006 Night Rod , never ran the same since it went too the dealership, I’ve had it from new , from the response I’ve gotten , they don’t like the bike , I get the feeling there prodigious mechanics 🤷🏼♂️
Another great vid, thank you.
awesome presentation !
Thanks again, another informative vid.
An M8 made it to 80k? Unfuckinbelievable!
Harley Davidson should be embarrassed
Hey man, love your videos. Got one question. You said one of the tappets needs replacment, should't you change all for of them due to weight difference?
When engineers redesigned the pistons to eliminate the side skirts in line with the wrist pins they must have believed that the loading on the pistons was only front-to-back. Harley riders like to lug the engine to get that low end torque, but that just increases the combustion chamber pressure and increases the chances of detonation. Detonation is like a hammer blow to the piston and everything connected to it, like wrist pins and rod bearings. Repeated enough times, it will pound flat spots on rod bearing balls and increases clearances on wrist pins. When that happens the piston will wobble in the cylinder bore. Nothing good will come of this. Now...
I put 50,000 miles on my 1200 Sportster in the first three years. It currently has 82,000 miles on it. Most of those were highway miles, with the rpm above 2000. My bike has a tach and I use my gears to keep the rpms above 2000, because below that number the engine will pound the rubber mounting when you try to accelerate.
Depending upon how bad the rod bearing is at operating temperature, it could be freezing the engine and the momentum of the bike, transmitted through the drivetrain, breaks it loose again and again.
Just picked up a 07 fxdl with 70k on it. It seems very quiet and smooth, yeah it’s stock, just slip ons. I’m wanting to have it built over the winter. Saving my coin in case I have to go And replace crank, but I won’t know until I get it checked. I have extremely basic mechanical skills. Anyway. Awesome video and enjoy your content. Keep the shiny side up
I have a 02 88 twin cam with 70k on the clock. Just put cam chest , hypo oil.pump , new lifters and bolt in Screamin Eagle 203 cam. Just trying to keep it dependable. Anyway my run out on this bike is only 2k I thought that was pretty good all things considered. I bought the bike last summer with 68k on it so I feel like it was taken care of well.