TWO STROKE resurrection - Yamaha TZR gets a new lease of life
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- Опубліковано 4 лют 2025
- So the story about this little project. I actually picked this bike up as a little side project for myself and to share on Patreon.
The bike is a Yamaha TZR 125R from 1994. It's a pretty rare bike that wasn't actually made by Yamaha but by Belgarda, which was Yamaha's distributor in Italy back in the 90s. The VIN of the bike doesn't actually say Yamaha, it says Belgarda. As far as I know these were never officially exported outside Europe. The 125cc market was a big deal back in the 90s and there's a whole history chapter there. These bikes together with the Honda NSRs, Suzuki RG125, Aprilia RS125 and a few other bikes were the most desirable thing a learner could want. They were the stuff of teenage dreams. Pretty expensive though so all the kids wanted them but only the rich kids actually had them. Despite the minuscule displacement this bike allegedly churns out 32 horsepower, probably at like 200 rpm before it's 11.000 rpm redline. The bike code is 4DL and the 4DL engines are very sought after because they were manually modified by Belgarda before install. The engine is actually a Minarelli unit with very obvious signs of hand porting on parts of the cylinder.
This video is made of up of bits and pieces of 4 separate videos I made on Patreon over the past months. I actually bought the bike without properly testing it or anything. Rented a car with a tow hook and a trailer and drove around 300 km to pick it up. I got to the location in the middle of the night in the pouring rain so I really couldn't properly inspect anything. So I just bought it. I expected a runner but it wasn't.
After a lot of troubleshooting trying to start the bike I realized that it actually had very low compression and that likely something was wrong with the engine so I decided to get the engine out which is an absolute joy to do. Takes about 30 minutes. Once it was opened up we found that inside it was an absolute horror job. Someone attempted to rebuild the engine but had no idea what they were doing. The piston was installed in the wrong direction (even though there's very obvious notches to show you where it's supposed to go) and because of this the little pins that hold the rings in place where in the wrong place so they eventually got knocked off and made a massive gouge line in the cylinder which ruined the compression and the engine. The crankshaft width was also set incorrectly and the crankshaft nose was bent by someone who didn't know how to remove the magneto from it properly. So we fixed all of that. The cylinder couldn't be saved but fortunately I managed to get a new one, got a brand new over-sized piston, had the new cylinder re-bored (fortunately the 4DL engines aren't Nikasil), got all new gaskets, a new starter and put it all back together.
Some of you might be wondering what happened with my Kawasaki GPZ 900R project. Sadly I had to sold that bike. Reason number one is that it was far too much bike for someone with next to zero riding experience. Reason number two is that I discovered that the frame was bent so I sold it for parts.
I think this bike will be less dangerous and should allow me to experience the joys of motorcycling in a manner more suitable to my skill. I think the bike is pretty cool as it echoes a really cool era and I kinda always wanted a two stroke.
A special thank you to my patrons:
Daniel
Peter Della Flora
Daniel Morgan
William
Richard Caldwell
Pepe
Brian Durning
Brian Alvarez
Dave Westwood
Joe C
Patreon: / d4a
#d4a #2stroke #twostroke
Support d4a: driving-4-answers-shop.fourthwall.com/
I got a strep throat infection so it's a voiceless video this week 😊 If you're interested in the details behind this little project please read the description.
Get well soon!
Get well son, my friend.
Go to your doctor so he can diagnose you with covid.
Make a video about pros and cons of desmodromic valves
Hope you get well soon my friend
No matter how many times a gearhead rebuilds an engine, that laugh that you did when it fired first, is always the reaction. It never gets old, and it made my day. Great project!
😍
Oh that feeling when everything goes together and the bike finally starts, such a sense on joy.
That laugh after the very first start. All we do with our cars or bikes is precisely to have moments like that.
Some 20 years ago I embarked on a major project.
My 93 NSR Mc21 blew up.
I started on my dream bike.
A 500 two stroke street bike.
I started on it long before the internet was a big deal so there was little information to work with. I just jumped in with both feet and hoped for the best.
The project was put on hold for a couple of years due to my life going down the drain.
At that point it was several boxes of parts and most of a motor bolted to the chassis.
After picking up the project again. It only took a couple of months of part time work to get it up and running.
Only about 5 kicks to get it running.
The feeling of satisfaction was overwhelming.
There was no one to witness the moment.
All there years later. I still have it. It sits in my living room on display.
I've changed little since the first day of finishing it.
According to Tyga out of Thailand, it's an impossible project.😎
It lives! I got so nervous seeing the battery part 😂 Great job! Look forward to seeing the progress on your next video 👍🏻
Why did the battery do that? 😮
@@FairyLiquid69 Most likely due to reverse polarity. I would bet that the voltage regulator died and released the smoke.
8:17 You should hold the can the other way around, then it will pour evenly :)
Great job resurrecting it! Love that you show your mistakes so all the rest of us can learn.
if only being a mechanic was the sound of classical music while in reality its more like having the tourettes sindrome every 5 minutes
I laughed out loud at that!
Where the ** did I put that special puller? Of ** I need to buy (another) one that fits.
This. This right here.
@@Dave5843-d9m 3 trips to the parts store for every step of the process.
I feel attacked 😂
Looks awesome! I’m doing a full resto-mod on a 1970 Yamaha AT-1 Enduro. Gotta love the simplicity of the two stroke!
That maniac laugh at the end made my day🤣🤣
Great Job!!
I just got my 07 R6 back from the mecanic and hearing that beast fire up after a long time is such a joy
The casual display of your MR2 back there must be the biggest flex on this platform LOL
The music was fantastic! Best music ever in a "rebuild" video. Thank you.
Reading what you said in the description, it really is a breath of fresh air to hear someone being that honest about their riding ability.
The real breath of fresh air is someone reading the description 😊 thank you.
@@d4a welcome mate. Just found your channel through the tzr video as I'm fanatical about 80's & 90's Yamaha 2 strokes but you have some real good mechanically educational videos. New subscriber. 👍
P.S do you have any dt125r videos?
I like the almost drop the whole bike! I had my rz350 rebuilt, and forgot something that requited opening up one side and I already had lube in the transmission. I laid the whole bike on its side to minimize spillage. So I totally get it!
Awesome, two strokes👍 and that laugh😂 Good job👏
Pure entertainment AND you're a Funny Fella too. lol As a VERY old ex Mechanic I haven't had the pleasure of watching THIS much mechanical fun in a LONG time. More please! .lol
Me after watching this video: "How hard can this be...I can do this...let's DO this"
Me goes to the garage to resurrect my own bike
10mins later: *HUGE EXPLOSION SOUND*
But it sound like it worked. Lol
Good to see an old two stroke getting some love. Brings back memories of my RD350LC YPVS, which had a monster of a power band, a few times pulling away from lights I was surprised to see the petrol cap instead of the road as it decided to do a power wheelie. Get well soon.
A joy to watch , and the music , spot-on !!! I haven't worked on an engine for 25 years :((
I love the precision assembly in this video, except for the part where a torque wrench was used on the cylinder head. Great video, brought back great memories of my rz 350 as a teenager, black and yellow, of course. I hope that you continue your videos on engine theory. They might not be new ideas to me, but your ability to explain things is really good. I have showed your videos to my boys, with the hope that they will follow my path of not relying on a mechanic to fix their car-you are helping that to become reality.
Love that. Just a few well meaning tips, buy an axle stand, have a fire extinguisher to hand, learn how to install a battery, use dry cell batteries, wear ear defenders inside around loud exhausts and.............you lucky bugger.
Nothing makes me happier as a motorcyclist to see my favorite car channel put on a motorcycle video
I had a TZR 125 in 1992 in Ireland, got a Suzuki RGV 125 right after that - I wish i had just parked them up in my family's garage with all the other stuff that's back there!! It would be so awesome to throw a few dollars at it now and restore it. Loved every mile on it.
i had one of these TZR125-RR:s in early 2000's, it was very nice looking bike (after i painted wheels in white :D ), and handled very well in every speeds, oh i love'd it. but it wasnt the easiest bike to maintain (exterior parts were extremely expensive), and feels like nobody didnt how to adjust the Y.P.V.S system. these have to be even more rare bike's in nowdays, good work guys!
Around 1974, when I was 13, I remember riding my cousins 125cc Honda Elsinore dirt bike…
I’ll never forget the crazy power !!!
2 Strokes FOREVER !
Just when I thought you couldn't get an cooler!! Two stroke bikes...love 'em. I definitely have a mechanical man crush on you now!!
A great video and learning experience made that much better by a Strauss waltz! Excellent work sir! Always appreciate your videos. Wishing you a speedy recover from the strep throat. I've been there many times. No fun.
I love this, it takes me back to my teen years working on 2 stroke engines from souping up mobylette's and then on to Yamaha's and Zundapp's and ending up with a Suzuki 750 two stroke.
A 2 stroke!!!!! LOVE IT😍
My favourite piece of classical music plus an interesting little video, thankyou.
I owned a 2-stroke sport bike. Today, I regret had selled it :/
Great bike, congrats! Keep and enjoy it :)
That Manic laughter in the end is, kind of, creepy... in a sense that it came so suddenly.
Good and fun litte project there.
Šta reći, osim BRAVO KRALJU!!! :-D
Pratim tvoj kanal već neko vrijeme i radiš odlične klipove. Jednostavno, razumljivo i fino objašnjeno sve. I ništa mi to nebi bilo čudno da sve to ne radiš u BiH, tj, u Sarajevu!! (gledam tablice na škodi i kadar "nevera", pa sam malo pretražio i vidim da si iz SA) Samo dokaz da se i kod nas može nešto fino uraditi.
Želim ti puno zdravlja, sreće, uspjeha i da nastaviš sa ovim sadržajem na youtube :-)
Pozdrav iz Banja Luke ;-)
Hvala puno! Pozdrav!!
Dig the soundtrack!
And that moment when you sparked up the battery… 🤣
My first bike was a yamaha tzr 125 1990, and the most I got out of it was 98 mph . The tzr is a high end quality bike . I like your one .
Its sooo good when you post video bacause then i know its quality content.
Nice bike by the way.
The tech looks like he really knows his stuff.
You can not only explain, you can also hands-on! Awesome dude
i misread the title as resurrection of the idea of a 2-stroke engine for a bike :)
Epic background tunes
Everyone that's ever rebuilt their own engine knows that laugh haha. Love these old 2 strokes be nice to see more videos on it.
I hope your strep clears quickly.
I love bikes and I love your channel. Have fun on the TZR (I'm jealous a little).
In the 90`s I drone a Yamaha RD500, best motorcycle I ever owned. It`s like digital driving 0 and 1, nothing between.
Had the Canadian version RZ500, should not have sold that one. I put 75000kms on that thing and it never missed a beat.
Nice project, right music for it!
Not so diffused here in IT, we had more Cagiva Mito and Aprilia RS, which both now have hefty prices on the used market. But we enjoyed these little 30+hp light beasts so much when I was 16 :))) Love them!!!
I've done this exact job so many times back then :)
I really miss working on snowmobile engines. The power they make, wow.
I like those foam filter, and i love 2 stroke engine sound
That face when you started it was me after doing the timing on my miata. “It works!? It works…heheh”
man, 2 strokes is never dies
4:45, LOVE THAT SOUND
Get well and enjoy the TZR 👍🏻
In my opinion the TZR don't be enought powerful for you, I started with a 54hp Ducati Monster 600, and in months I felt that I need more power
I enjoy soo much your videos
Greetings from Spain 👍🏻
Loved the fact you syncronized the hammer with the violins at 1:45 :)
The Driving For Answers Transmission guy get r done !
Engineers, Technicians, Designers and Mechanics MAKE THE WORLD GO AROUND !
Hope you feel better now. Strep throat is horrible. I’m glad a pro like you managed to short the battery too, It’s definitely something that I would do. 🤣 Always nice to hear it fire up after being in so many pieces. Great vid. Stay safe.
I het that excitement when i stripped the bike and after put back together it still starts hahah good one.
**throws empty box at your head** please more 🤗
Bravo. Good stuff my friend!🙏🏻❤️
ooo pa sad sam tek skužio po tablici na škodi da si ti tu naš domaci dečec :) svaka čast na videima samo tako naprijed :)
good catch .. really pleased you got that, didn't want to see it on the floor 👍
i used to to have a 1992 sp balgarda, loved that bike. these bikes are alot of fun
Like the MotoGP tee shirt, Ducati’s last riders championship 2007 with Stoner, next year it’ll be Pecco with the 2022 championship
wow didn't know you do 2 wheels as well. awesome mate :)
Great video man! 👍 Funny how it's a gearbox with a single cylinder attached to it. It's so small! 😂
I love this video. Everything fitted perfectly. Also, had a good laugh
How nice, i like to play the waltz on accordion, tomorrow i will be heading to eicma fair in milan , i will mention you in my video there 😁
Don't, it's a waste of precious video time 😂
@@d4a already wasted some minutes in my Yaris GR video, and found out we have lots of common followers :))
Two-stroke tuning, the Black Art.
8:57 keep doing this and you may get a sweet Keysight sponsorship
Ehehehe
Beautiful video. Brilliant work ;-)
Any more iconic engines in your garage?
Nothing other than the mr2 and the tzr...... Yet 😋
@@d4a Too bad you couldn't replace that Yamaha engine with a Rotax ETEC voice coil direct injection 2-stroke engine like the one that Skidoo uses to power their snowmobiles.
Oh man :( I thought you were going to tell us that Yamaha is planning to release a new 2 stroke.
But this is cool, I love these bikes. This is all pretty much mandatory work if a body plans on buying one.
I think it's the same engine as the TDR125 but with different management. Great video.
Excellent music, lovely engine, great memories - 👍
TZR 125r 4DL belgrada
I loved mine!! It was red and white and I want one again but prices are insane!!
Ah yeah, the angry 125cc crotch rockets from the nineties. I had a 1st gen Suzuki RG125 Gamma, good value in 1992 as the dealers wanted to clear the stocks for the new gen model. Those were the days.
Behold: the engine head in all his natural glory
Lovely bike. Enjoy riding it... :)
2 stroke will never die.💪😊
I had an engine from a tzr with 170cc cylinder kit on a Yamaha rd 1987ish. Crazy fun
Very well done! Bravo, Sir!
That was so emotional
10:09 sounds like me also after working so hard and getting things done.
2Stroke never die!
Beautiful!
That battery though...😳🤣
Both the cables were missing insulation and I didn't notice. I'll look twice next time 😐
In any case you got fired up🤣. I once used two black leads and dit not ware my glasses 🤓. A huge mistake😬🔥
Locomotives use a 64 VDC battery bank. One day I thought I'd try cleaning some corrosion from the battery knife switch... using a brass wire brush...
@@jameshaulenbeek5931 Ouch!
A bike I have never heard of?...... but I want :)
I am also planning to revive my grandpa's old Honda Kinetic Scooter
Ahhh, the smell of half burned hydrocarbons is burned into my brain. Grew up in East Germany, this reminds me of the Simsons, MZs, Trabants and Wartburgs when I was young.
I wonder how you missed the opportunity to throw up a wrench and film it in slow motion and play "Also sprach Zarathustra" along with it.
Nice work!
a giant chainsaw bike. I love that sound
That laugh when the engine turns over. ITS ALLIIVVEEE
Fuck! I had a TZR125 in 1992! It was much more reliable and less of a pain than the 88' Cagiva Freccia.
I see you took one out of the book of AvE to make this video. Great job 👍
Chief, a 2t is never not dangerous like 4evaa 😂❤
Nicely done 😁
i had the 1987 tzr 250 for a few years (about 15yrs ago), was a great bike, was only 1800$ aud
One of the few things I regret is that I did not purchase a Suzuki RG 500 Gamma at the time.
it`s alive ! IT`S ALIVE !
Very nice video , 2 wheels are always better than 4. Please do more Motorcycle videos. Thanx in advance
Great music soundtrack!
philips screws on the clutch spring bolts is a sin.
nice work 👍
beautiful Austrian music