Engine Failure, Yamaha Enduro 360, Let's Tear It Apart.
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- čas přidán 8. 06. 2024
- I bought this 1974 yamaha dt360 off of facebook market place. the past owner bought it non running and gave up, well it has low compression so time to take the engine apart to see what happened and what we need to fix it.
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Let’s give Darren a atta boy for not turning this channel into a merch monster . This is old school CZcams . We can all enjoy his back handed humor and being one of the guys . It always feels like we’re in the shop helping out . I have been here since the beginning , how about ya’ll ?
Not since the beginning, but I got here as fast as I could. I agree with everything you said.
I got here in the early thousands, I want to say 2500-ish. Don't think I've missed one since
💯% Agree
Twelve years n counting!😊
The first one I saw was in the home workshop. I'm not sure when, but I do enjoy the carb clean.
I must be over 10 years watching Darren Wrenching.
A true all round mechanic, no profanities, no merch shoved down your throat, no sponsors, exagerated shouting or over acting.
Darren explains everything as he goes on, he talks to you as if you were standing next to him.
No pretty rubber gloves, Darren doesn't care about getting his hands dirty.
If any channel deserves a million subs,, this one does for it's consistent, informative content.
Never change Darren, we love you just as you are.
I wonder if he talks to himself when he’s not videoing?
@zzzman2206 I talk to myself all the time. Also talk to the vehicles I am working on too 😂😂😊
@@zzzman2206 A lot of computer programmers use "rubber duck debugging" which is basically talking to yourself (or a rubber duck) about a problem in order to solve it. The act of explaining the problem out loud to another person can help you make the connection needed to solve it. I don't think this technique is used only by programmers, as Darren is clearly demonstrating it.
@@zzzman2206I also talk to myself, I even have conversations with myself
@@zzzman2206 probably, as he doesnt seem to have his dog anymore.
I’m now 63 yrs old. But a long time ago, my buddy ran that Yamaha 360 and I ran a Suzuki 400. Man, those were the days!
I'm 63 also for sure this bike brings back a lot of great memories I owned a couple of these Yamaha Enduros in the 70's. I also had a Suzuki 250 back then as well always loved the Enduros.
What a flash-back. I had a Yamaha 360 when I was a teenager. Gotta love the 70's......Good video.
Lol. Me to. My first non road bike.
Did it ever kick you back when you kicked it? 😢
@@boofer875 I put on a compression release thumb lever on the handle bar when I kicked it over so, not so bad. The Honda CR 500 two stroke would kick my ass starting it with kick back when it was hot.
@boofer875 That was an instant flashback - my dad had one.
When the bastard thing kicked back on me, my foot skated off the end of the kickstart, which smacked me in the back of the knee. Instant pain. Not a bike to kick over casually 😅.
ONLY two strokes have the pins in the pistons to keep the rings from spinning, it's to keep the ends of the rings from rolling around and CATCHING a port, they keep the rings right where the designers wanted them, nothing to do with keeping the gaps from lining up
On the 360 it had a stock bore of 80 mm stroke of 70 mm. In SAE is 3.149x 2.755. the .75 on the piston is in mm, as in .75 mm over bore. Or 80.75/3.179.
Using a caliper is not the best way to measure bore sizes. A set of telescoping tools is the way to go. These are aset of tools that kinda look like a T. The top of the T is spring loaded and the bottom locks it in place. You slide the tool into the cylinder and move it around to get the top of the T centered and level in the bore. Then lock the tool and tip it sideways so you can lift the tool out without disturbing the tool setting. You then measure across the T.
Measure fron to back and side to side at just below where the rings stop at TDC, just above where the rings stop at BDC and half way between. These measurements will help determine the bore size, out of round and taper. When boring an engine you bore out to a size bit over the largets measurement you got on the cylinder at the largest pointin the bore plus whatever extra need to clean up any deep scoring. You have to bore more to come up to the next overbore size. These over bores come in increments of .25 mm. So if you come out to .65 over to clean up the bore, you need to go to .75 to get a piston to fit.
In this case your already .75 over and from you measurements you may need to go .100 or .120 or more to get a piston.
Often if you have to go much over you need to replace the cylinder sleeve. Not hard to do just hard to do right.
None of that seems correct to me
Ok.
@@user-qv5lm8nr5n That's presumably because you know very little about two stroke engines? The OP is totally correct, though telescopic bore gauges need a fair bit of practice to get repeatable results.
@@ferrumignis Presuming I know very little about 2 strokes is flat out wrong. I know nothing about them.
@@user-qv5lm8nr5n on what exactly do you base your statement that it seems incorrect what leonhart wrote?
The arthritis in my hands is getting worse and I have these moments where I just want to go to the garage and wrench on something. It's so peaceful to just work on a project. But my hands won't do it. Uncle Mustie has that way of making you feel like you are there with him, just wrenching away. It's the calm I can no longer get myself due to the pain. Thanks for bringing us along.
For the most part, it's complete, straight and not rusted out. A good candidate for rebuild.
Those things are so cool. So much prettier than any modern dirt bike.
New dirt bikes and enduros look like they belong in an anime cartoon.......
@@muskokamike127 Very true. It is kind of like the new pickup trucks that look like they escaped from a transformers movie set.
@@mkshffr4936 I prefer 70's, 80's, 90's pickups before they had all the extra gadgets on them, just to have something to go wrong with, and they were easier to work on. Too much electronic s**t nowadays. But we'll never go back to those days.
@@mkshffr4936 Yes! It's finally time for me to replace my POS 2004 F150 and I'm finding that as well. Not to mention all the gizmos and goo gaws....
@@muskokamike127 Given the prices they are charging a fully restored 70s vintage might not be an unreasonable option. 😇
The " PINS " in the piston is to keep the ring ends from entering a port and popping out into the port and breaking!!
Yeah, he doesn't have a clue. People with even less of a clue believe it, though. SMH.
Makes sense.
@@TruthHurtsSomet1m3s Mustie has forgotten more about small engines than you'll ever know!
Exactly correct!
Why are those pins then located right where the transfer port is?
The capacitor is there, so that the bike can run without a battery, it prevents excessive over voltage, and stores some charge when the engine stops. 0.75 is the oversize in mm.
Good afternoon fellow Mustie1 fans everywhere, from a bright sunny 😎 Lincolnshire, UK 🇬🇧. Time to take a break and watch another great video
Good Morning from Alberta Canada.
Yessir, good day to you, I'm in the northeast USA.
Sunny Manchester 🌞 😂
Morning from North Carolina.
Morning from co durham
Noticed that Darren is using the rachet more than buzzing off with the cordless. I like it, doesn't interrupt his commentary.
You have a lot less chance of breaking a nut or a bolt when you use a wrench or socket to remove it as well.
You can have more time to think use your eyes and be thorough too
I noticed that too. I tend to agree with you on the less noise.
Just got my coffee and sat down to see a new mustie video. Good morning from Kentucky.
Got my BK. BREAKFAST and enjoy😅😅
Good morning from Wa state.
I love watching this guy. I would love to have a general knowledge of everything. Just rips into things, with no manuals, and fixes them. Love it.
Hi Mustie,
My first bile was a DT360, a year or two before your Enduro.
The top ring was L shaped and right to the top of the piston gave them a really high compression ratio.
It was a really "tight" engine. when I saw the piston slap around I knew there was something amiss.
I think the second ring had a thin wave ring behind it, (could be wrong) but the ring gap looks too big.
The valve in the de-compressor could be a problem, but they were more known to stick closed than open, causing foot OUCH!
The engine strip down brought back memories.
The DT had a manual decompression lever, a thumb lever up on the handlebars, fail to use it at your own risk.
They were renown for kicking back and damn near breaking your foot.
The magneto removal tool was a "must have" as the kick back often ended up in a sheared woodruff key in the magneto.
If yours was red, it was a 73
19:07 Dykes' Ring. That shape is to allow them to come right up to the top of the cylinder. Also helps them seal better; the pressure exerted by compression and combustion is better able to push it against the cylinder wall.
That's right ! Dyke rings were common on Rotax's snowmobile engines of the 70's and 80's.
@@cybair9341 Also common in some model aircraft engines which is where I have encountered them.
The main reasons for the Dykes ring are that it gives a more precise port opening for accurate port timing and a rapid exhaust port opening to give a higher pressure pulse for ensuring a more efficient tuned pipe operation.
@@cliffwilliams6349 I encounter them in model aircraft engines that don't have a proper tuned pipe. I could easily see how that would benefit, though, and the engines that I encounter them are known to respond quite well when their mufflers are replaced by a pipe.
So when Mustie1 had just started, I started watching him, I was recovering from a serious illness. His videos gave me entertainment, knowledge, and above all company through that low period for me. Still a faithful watcher, as Darren makes it entertaining. But boy, I miss the old trash picked lawnmowers, generators etc being brought back to life, and more than anything the old VW motors in an unknown state being started. Thanks very much Darren, for all the years of laughs, knowledge and entertainment!
I don't remember the flange being welded to the exhaust. I remember it being loose and being able to spin it out of the way for removing the pipe. There was only one head gasket and it was copper. I used to heat it up, on my parent's electric stove top, till it glowed cherry red before reusing it. This is bringing back a lot of memories. My bike was 3.5 years old when I got it.
yeah i noticed that myself. its supposed to be free
Wow, this brings back some great memories. I owned a 1971 Enduro 360. Black with a red pinstripe on the tank. I am a big guy and that bike had no issues pulling me up the side of any steep hill I had the guts to try. Thanks for bringing back those memories.
My first bike was a RT-1 yamaha 360 and boy I had a lot of fun on that thing and also got into lots of trouble.I paid $110.00 in 1979 and really raised some hell in my neighborhood.I was the 5th owner of that neglected machine but I made it right.
Good morning from East Tennessee, my favorite day of the week Sunday morning, coffee and Mustie 1. Undeniably the best CZcams channel and content out there.
What part of East tenn ? I'm from East tenn also
The only thing I was waiting for during the entire video was to see compressed air backfed from the cylinder through the decompressor to see if it had failed Open.
Thanks for sharing 🇨🇦
That coller on the exaust should spin its just rusted
A friend of mine had an Enduro 100 back around 1985 and it was a blast. He used to pull us while he was biking. We would just ride next to him and hold his shoulder. I actually passed a cop on my bike doing about 50 in a 35 and he must not have spotted us. One time he pulled 4 of us (each holding each other's shoulders). We were all poor but him. We started doing this with his moped and his dad kept wondering how he was burning up the clutches so fast. We were riding double on it one time and he panicked and locked up the breaks and put the bike down. I landed on him and knocked the wind out of him pretty bad.
I love those Enduros. I had 2 when I was a teen. Then, I bought one as an adult and actually managed to get it running and drove it a couple of years. Then, like we do, I let it set for too long and wound up selling it, super cheap, to a teenager who loved it. I hope it's still out there being enjoyed.
I love the older projects lately! That green is a great color!
This brings back memories. I bought a Honda 1980 CB400T, black with orange stripes, right off the showroom floor when I was in school. It was a step up from my 3-speed bicycle which had been stolen from the dormitory. I loved my Honda.
That’s not a solenoid under the seat it’s a Capacitor. It’s to eliminate the battery. Rex’s speed shop in the UK makes several 12 volt conversion kits for this and other Vintage Yamaha and Japanese bikes of that era. Their kits can be purchased directly from them or through the Vintage Spoke in the US
Haha should have waited a little longer in the vid to comment
Ahhhh...Sunday morning with coffee and Mr. Mustie! Great way to start the day! Glad to see some more old motorcycle action!
Added comfort with. BK BREAKFAST. FOR ME
Good morning from Norwich uk, it amazes me how you find these bikes in the 🇺🇸 US, we can hardly ever find these in the UK and if we do, the prices are premium…
With Yamaha 2 strokes of those days, a piston with a hole melted through the crown was not unexpected.. waiting to see...
Awesome been waiting for a good old Enduro rebuild luv these old Yamahas
Man I love the videos where you're getting an old motorcycle to come back to life!
Thats known as a " DYKES RING" compression gets behind the ring and pushes the ring out against the cylinder, if you look at it from the end, its L shaped!!
I learned to ride on a Honda CB 175. Great street bike. A whopping 18 hp. We lost the cam in it. Had to rebuild it. Great fun. Love this channel. The first thing I do on sunday is have my coffee with Mustie and enjoy his vids.
Thank you for a great channel
Much Love from Germany Thank you for still uploading your awesome videos.
Very cool as usual.
Not a failure, just a part one video!
Thanks for your time spent on making these videos.
I bought a brand new 360 Enduro in 1972! When I finally sold it! It was junk in a box! Terrible dirt bike, terrible road bike! I absolutely loved it!
I love it when you find an old Japanese bikes. That Honda CT70 was one of my favorite videos
Greetings to all. New Mustie videos always pop here in Perth, Australia after dinner on a Sunday. The perfect evenings entertainment.
No brum brum today.. well at least we have a good quality time !! Thanks Mustie!!
Had a DT400 back in the eighties, this reminds me of the good old days breaking my foot trying to kick the thing over! This channel has taught me so much, totally appreciate this guy and what he shares. He’s a great teacher, between him and Norm there’s not much else you need to know.
This bike and the DT400 had auto decompression, so the PO of your bike decided it need deactivation..? They normally weren't that hard to start compared to like a Maico 501.
@@tauncfester3022 guessing I didn’t know that at 16. Had a Yamaha FS1E moped before the DT. Didn’t know much at that point in my life but it was so much fun. Remember seeing a Maico at the dealership and wishing it was mine but didn’t have the money. They also had an RD 500 Gamma, should’ve bought that along with the NSR TT bike, geez, at least I had a TDR250 for a bit, should’ve kept that one too😖
Wasn’t an NSR, was trying to remember the RC30. That TDR though, Yamaha was making that and the Banshee, thing was bonkers. Damn I should’ve bought the Honda…
@@robertmckay694 I owned a 1975 Honda Elsinore MT250, the Enduro dualsport with lights. The PO had a shop shave the head to bump up the compression a bit. it was about at the limit of what I could comfortably kick start on a "big" two stroke. The early silver tank Honda Elsinores were good bikes, simple, and in the MT250's case, points and condensor.
@@tauncfester3022 have had a ‘75 Bultaco Pursang in boxes for twenty years if you’re bored and need a project. Might put a smile on your face.
I have a 5.5 HP Briggs & Stratton on a walk behind trimmer. It wouldn't start.. As I had seen you do it many times, I put in a new spark plug, squirted some gasoline in the plug hole and it started on the first pull. thanks for helping an old man!
I owned one of these 360 enduros in high school back in the 70’s. It was a great bike.
The locating pin on a 2 stroke piston is there to keep the ring from hanging up on the port, which would break the rings.
Really hope you continue this one. This is one of my all time favourite bikes. Seeing this one come back to life will be amazing.
The extra spark plug hole was for a decompression release. The screwed in, guys would use them when racing flat track as a brake.
Good morning everyone... Another great video... Wow that Yamaha 175 was just like the one my neighbor had Wow brings back memories... Thanks for sharing have a great rest of your week.
Greetings from Central New Hampshire!,, perfect project for this week in that Bike Week is just starting. Sunday morning here is raining and so this is a perfect day day have some coffee on the porch and enjoy watching Darren do his magic. A great channel with no addons. Huge Fan.
Another great video, these 'L' shaped top rings were called 'Dykes' rings. The reason you see ring lands all the way around the piston sides is because the top ring land was turned down to allow for the ring wall😮 they were supposed to improve compression & were used in competition motors in the early day's & then migrated to road performance motors 😉👍👌
Like many of you that have a Sunday morning routine of watching Mustie 1. I have the equivalent of a doctoral degree, but what our country needs are people that can work with their hands, and figure things out. We need skilled tradesmen, and women. He’s decided to not cash in on his extreme popularity by not having sponsors, merchandise, etc. He’s my favorite CZcamsr!
yup
I love those old Yamahas and Hondas. Amazing for flying over farmers fields, cross country in the bush, or just tearing up some sand on the beach.
It's a 1974, first year for the high fender and thru frame exhaust.👍🏼 The engine was completely redesigned for the first time since
1968 as well.
Love the walk through , strip down and calm measured talk through .. with humour and modesty, we love ya Mustie 👍👍
The Yamaha enduros are 12v. At least from 1972 forward. My first motorcycle was a 1972 CT-2. 175. It was 12v. Additionally the top ring is a Dykes style (L cross section) and the top of the piston is slightly smaller diameter this allows the compression to push the ring against the cylinder. That amount of piston slop is pretty bad. Bore to +.010 with new piston and rings
No. 6v in most countries.
I have a 1974 dt360. It is 6v from the factory.
My favorite channel, Thanks Mustie.
Me toooooo
I've been watching you for years already now. You remind me so much of my late dad who was also very much into mechanics and car repair. Well, any kind of repair really, he was always busy with something. Looking at your videos always brings back so many fond memories ❤
Love the old style videos of taking things apart and figure things out!
A little correction about the pins for the rings.
Yes, they can keep the ring gaps away from each other, but their main reason is to keep the gaps out of the ports in the cylinder.
Here from North Carolina, good morning!!!
I'm really looking forward to the next video on this bike. This era of Yamaha is one of my favorite bikes...
In 74 I was 13 and got my first bike. A Kawasaki 90. Then when I was 15 I bought a mint condition
73 Yamaha 250MX bike that had only been rode three times. It was silver with the yellow swoosh stripe on the tank. I loved that bike...
You always buy some of the coolest stuff, your just a little behind me in age I'm 62. So we are the same era, I use to love those bikes back in the day also. Keep the Great video's coming out. Don, CA.
Darren, you'll be glad to know that virtually every part is available for this bike. There's a thriving community of enthusiasts out there and many parts are being remanufactured. it's worth persevering with it because they are in demand and bringing very decent prices, especially in places like the UK.
I enjoy these old motorcycle repairs the most. Thank you.
BAck in the day, a friend had one in 1971 and good Lord was it a beast !!!
Saterday night I drove 4 hr round trip to pick up an 81 yamaha sr 250 "exciter" for $300. The current owner s brother had bought it new in 81. The original owner passed away in 1994 and from then on it was it his brother's shop. I had a Mustie moment when I spoon fed it gas and it ran! I love that feeling. Everything works but the carb. I opened it up to find the main jet missing 😅. Now I wish I had thowse mustie skill 😊
Had the exact bike. Bought when I was 15. Out of all my bikes, the 360 enduro was the best. Dirt, street, or snow ... it just drove. Hope you get it finished!
Good evening everyone from Kyoto Japan.
They throw out old HONDA MOTORCYCLES in your junk yards??????
@@user-ht1xu4gv2u I wish they would send them here! We don't care if they are old and obsolete.
I'm onboard with your approach to this repair, your experience with this type of bike shines through. Good job.
I had the DT 100 enduro back in the 80's .👍
It was great fun.😃
Best of luck, from across the pond. 👍
a buddy had one of those, I had a honda mr50 and he used to leave me in the dust.
Morning mustie from uk yorkshire
Use to have a 73 Honda cb 360, same bike but mine had street tires. Always entertaining and educational videos from one of my favourite channels.
wait, when did a honda cb360 become "the same" as a Yamaha DT360? lol....Well, they're the same except for the fact that they are different manufacturers and the honda is a twin and this is a single...DOH
The only thing that was the "same" was engine displacement . 2 completely different bikes.
@@muskokamike127 The CB360 was a twin cylinder four stroke road bike produced by Honda, the DT360 was a single cylinder two stroke enduro style bike produced by Yamaha. Other than these minor details they are pretty much the same bike. Well, they both have two wheels so there's a similarity.
@@andystokes8702 I know right? OH, they also had carbs so that makes em identical!
I wish all CZcams channels were like yours Darren, keep up the good work!
Been watching a long time,one of the best Darren,always enjoy your channel
Hi, Rex's Speed Shop is a British company that manufactures new replacement ECU's for motorbikes.
They also do 12v conversions for these. I have their full ignition and 12v conversion on my DT400. The ignition makes it easier to start without splintering your shin bone.
@@bobuilt10 Good point fella, I purchased a new ecu from them for my RG250 Gamma mk1.
I don't know why I called it a ECU, I meant CDI..! DOH..!
Hello all from south florida
Down the street in Metro NYC
Hello from N. Fla, st Augustine.
Love this video! I have been watching local sources for a 1980 Kawasaki KDX 400 for a while. We had one on the farm when I was a kid. That bike was an absolute riot. This just helped get me more riled up.😂
absolutely love these old yamahas! thank you for the video. great job as always, thanks Mustie!
Morning Mustie fans…..👍👌😉🇮🇲⭐️
31:47 hone it, light sand the piston to remove some of the scoring, good to go! It doesn't look that bad honestly.
Hello from Romsey in Hampshire uk watching another great video from Mustie 👍
hi on all my Yamahas I clean the gas tanks with water mix and Muriatic acid, does a great job in let it sit 1 day ..I buy nothing that runs for over 12 years , //lol my 2000 Lincln ,my 1996 Mer Benz E class 300 diesel, and my 1982 XJ 750 Yamha , and my 1960 C J 5 willys Jeep now running rebuild F head motor . //use Muriatic acid
Good morning from MI
Afternoon mate
Dual sparkplugs was an old tuning trick. Igniting the charge in two places gives a faster flame front.
The 360 and the SC 500 had compression releases. Possible compression release is stuck open. The SC 500 was a leg breaker without the release. I raced a 360 and a 500 a few times. Awesome torque and rock throwing on the rider behind you.
34:27 0.75mm, 3rd oversize.
2vintage from Wisconsin would love this for his collection
He's not half the engineer Mustie is.
That kid would ruin this bike, he doesn't know what he's doing. He doesn't even have a lift, he sits on the floor like a child and works on the bike.
@@dannyjamison8337 i do agree he needs a lift i doubt he would ruin the bike
@@bananabrooks3836 yes only because mustie1 is more of a fabricator and outside of the box designer
@@douglasledford7497. You're right, he probably wouldn't ruin it. That was a bit of an overstatement on my part.
I've told the wife that one of these will be my next project, when I can find one. My first bike was a 78 DT125 (new), thanks for the refresher 😊
I think the top ring is called a Dykes ring which is an L shaped ring that needs less side pressure as the compression pushes the ring against the side wall for better sealing.
My first bike, bought brand new.😊
My first bike was a 1975 Yamaha DT400.
Great bike, I passed my bike test then bought a DT400.
It was not my first bike, but had several Yamaha Enduros and it was the best of them all. Bought new from D&D Yamaha in Norman, OK in 1975.
@@michaelferik8060 I also Bought mine new in 1975 form Yamaha of Columbia in Columbia, SC.
My first “yard sale” motorcycle crash was on that year and model. Way too much bike for my 12 year old riding skills. Can’t remember what story I told my mom back in 1978, but none of it was about crashing on my friend’s motorcycle. Another great Mustie1 video.
Smashing 😊😊😊😊
Good morning
Awesome restoration muste one Hope to see more videos of you getting at running keep up the good work 🤘
awesome and outstanding as always.thanks for sharing and taking us along
Greetings to all hard-working men and women from North Carolina farm country.
What about all of us lazy idiots that need a shout out?
360cc 2 stroke must have been a fast bike when new
Yes, they were powerful
Having a beer right now watching this is like being in my best friends garage. Cheers Mustie!
Had one of these in the '70s. Mine had a manual compression release that worked sorta like a Jake-brake when going down steep grades. I think that's what that second spark plug hole is for. Loved that bike.