Young man I can see you REINVENTING the wheel one of these days. My sincere congratulations. Can't wait for the final project. Keep up the good work.

I am amazed on how creative and talented you are in coming up with your builds. Keep up the awesome work and never stop what you are doing.

This is a cool project. I watch a lot of videos of people building go-karts, buggies, atv's etc. Hell, I'm subbed to two different channels that are building mini aluminum jet boats right now. But, I think this is cooler than both of those. I'm really looking forward to seeing the finished product.

As usual, a well put together video. I always think: "I wonder whether he'll put a brace on that. Ah yep, he's done it." Nice to see someone who takes pride in doing a good job. Only thing I think you might need to consider is RPMs. That drive shaft from a VW is likely not rated for any more than about 2000rpm and I've just looked at SKF bearings in those oval housings (not sure what you've used but I cant see it being better than SKF) and for a 20mm ID they're only rated for 8500 max RPM. Some problems to chew over... Maybe fine for occasional use but I think they'll become headaches if left unaddressed. All the best!

WOW， amazing work, you are really perfessional mechanic, so brilliant.

Awesome project! You really should be using epoxy laminated marine plywood beams instead of poplar 2x4’s. Also You really need to use a dial indicators for shaft alignment to measure runout to reduce vibration caused by misalignment.

You definitely have to add the ZZR decal to the jet ski when you're done and painted. This is awesome buddy, this things gonna fly. Be safe, and can't wait for part 4

Looks awesome, metal scatter shield may not be a bad idea.

Jornt ik heb grote waardering in je werk, buiten gewoon creatief, en wat ben je een groot werktuigkundig talent Ik maak me toch wel zorgen over de geweldige kracht van de motor. Ik kijk uit naar de volgende video en blijf vooral doorgaan met je hoogstaand werk, en met testen blijf voorzichtig.

If anyone else tried that frankenstein driveline, I'd be concerned. I have confidence that it will work beautifully for you because you are so talented at making stuff like that magically work!

I think it's excellent! Outstanding sleeves up, dirty hands engineering! This is the way things get accomplished. Thanks for sharing, love it! J.

Make certain to add some plates below those wood runners where your engine mounts bolt through it,otherwise you gonna have some loose bolts issues very quickly... Blue loctite is your friend also... Great idea on how to couple the engines output shaft to the jet drive..

I was so happy to get this notification and watch this lol.

THE BEST diy jet-ski ever seen! is loading

Your engineering skills are next level

You might make sure that the oiling system for that engine is up to snuff. You may have to add/reposition baffles in the oil pan, the engine will be tilting in directions it wasn't necessarily meant to in that configuration. Also, think about putting a system in where oil changes can be done without removing the engine, or reaching underneath it. An easy solution for both is to use a dry sump system. You may also think about using a heat exchanger for cooling, as opposed to just letting the water from the lake/river/ocean/etc. run through it. This engine doesn't really have anything (anodes, coatings, etc.) to save it from corrosion. Other than that, keep up the good work.

There's no shame in being killed by an awesome machine you built. Well, unless it's a rocket and you only built it to prove the earth was flat. 😂

If you've never done the old two handed knee vice trick you're just not a real homemade madman

i like your idea and OverallConcept i began riding PersonalWatercraft in the late 1970s then continued buying new machines into the 19990s i always thought it would be kind of cool to have some type of Transmission on the drive system once the Manufacturers started installing Engines at 1000 Cc and larger BTW i have ridden a lot of Motorcycles as well and i liked controlling the speed of my bikes through the gear boxes instead ofthe brake systems because it gav yu the ability to Power out a turn

Yes that is exactly how you know an engine is good..... must rev it constantly and race it the second you start it. You sir have a perfect beginning of a 1200cc boat anchor.

This is MADNESS! LOVE IT! from Philippines

Epic series!! Can't wait to see it on the water with the engine

I like 1200 and the price is affordable to the others but the frame and plastics are only something a mother could love. love the fabrication and swap inspires me to want to get my money right and dream big as well. With the right knowledge and skill anything can be made

Awesome engine mounting design with some problem solving that's impressive. Most aim for a direct drive to the impeller but you did one better with a design for any engine, with the right tools helps, lol. Or skilled shop! I hope you sell these designs too so we all look forward to future videos & to see this bad boy burnup the water!!! The engine mount frame is user friendly for several different motor/tranny setups.

Nice work man!! I build one off custom boats for a living. I’ve always wanted to build my own type of jet ski out of aluminum just because a can lol. I’ve had plenty of name brand jerskis over the years but there’s something about building one from scratch that has always interested me. Keep it up!!

Mooi werk weer! Heel bekend motorblok! Zit ook in de trekker✔️ Ik zie nog wel wat uitdagingen voor verderop in de bouw zoals de uitlaat die heel dicht langs het hout moet komen. De rvs bochten van mijn uitlaat waren met 1 minuut blauw van de hitte. Ook hoop ik dat bij vol gas varen en springen (lees 170 pk op de aandrijflijn, dan springen en weer in het water landen) het hele motorblok of de aandrijflijn eruit gerukt wordt. Maar dat zal je uitvoerig gaan testen, daar twijfel ik niet aan! Mooi project, hoge bouw kwaliteit en engineering👌🏻🔥

Pinch that belt around the prop shaft pulley with a couple of roller tensioners. There’s a tremendous amount of force on the prop shaft and it may slip in the current configuration.

Man you're ingenious. We need more people like you!

Really impressive creativity and skills.

I was hoping you were going to give the bike a one final goodbye burnout before turning it into a jet ski the moment you brought it into your shop lol 💨 😂

Your videos are by far some of the very best build videos I’ve seen! Found your channel recently an honestly, I am amazed at your work! Really enjoy your work on your channel and definitely one of my top ones that I follow now! Anyways can’t wait for the next one! Cheers and take care! From NB Canada

Refreshing to see a young man with talent, good for you. Enjoy your vids.

Fuel injection will shrink things down some I'm extremely impressed. It's a rare thing these days

That's BA. Can't wait for the next one

I have nothing to say that has not been said in the comments here, just doing my part in helping the algorythm cause this deserves all the views it can get. Amazing work man :)

Fantastic build. All of the people questioning the integrity of wood forgot about Viking ships that sailed all over the world. After epoxy and matt fibers it will be strong and water proof but still retain the vibration dampening and flexibility. Very cool.

Listen, yamaha did a gear reduction ski in the MR1 platform, but you sir, are making this your own....ANNNND I AM HERE FOR IT!!!!

Masterful work Young Fella.....Pure Genius

Still significant wobble on the sprocket side when you rotate the driveshaft in the last part of the video. Think that will cause lots of vibrations. Maybe you can reduce the weight more in the connection piece you made? You also might want to make a metal drive shaft tunnel for safety. Also on bottom side. When that drive shaft breaks it will cause havoc.

Nice progress. I recommend you put a bolt tensioner on the belt drive as those slots will slip and lose tension. It's a 160bhp engine with gearing reduction remember... Also I would not have kept the gearing personally, just used the belt reduction. And I hope the engine is not too far back for weight distribution. I'm sure it is similar to the jetski but that's a small engine and large hull compared to the jetskis themselves. I hope it works great.

You should take the frame and forks of that bike and make an electric street fighter motorcycle!!

the amount of stuff you can do alone is amazing man! Very Brilliant individual!

U doing good my friend you are a very smart man keep doing what u think is best n never let no one tell you that you can't do it I want to see it when you finish grate job 👍🏽👍🏽

That’s great stuff! Man it’ll have some power. The belt drive tensioners may need a locking bolt to stop them from twisting loose with the amount of torque that engine will have, same thing happened on my golf cart jackshaft..

Well designed and executed. You definitely learned from your mistakes on the boat. Cant wait to see it run!

I can’t even imagine what you would build if you had every tool you wanted or needed!!

In the next vídeo, please consider to explain the details about how you make this engine works properly, such as the electric system and the carburador! You are the man!

In all honesty, I would have put a sleeve over the joint on the driveshaft that you welded , and also beef up the structure that the cv joint goes into , there will be massive torque loads on the area . Otherwise top work as always 👏 👌 👍

Your builds are getting better and better! Keep it up! Curious to see it fly!

This is such a good channel doing serious builds. You asked what do we think. Well for me I think it’s outstanding👏

very interesting, thanks for showing the progress. hope the next part comes soon

New fan! I love the way some guys create those kind of things in the garage! Some time that makes us look like complete useless men, inspire us to do the same! 😄😄😄

Enjoying the project - thanks for the excellent content. As the engine/water jet are mounted separately the belt drive between the two is a seriously weak point given the rpm/power it will have to deal with. In performance boats, alignment of the engine and propeller shaft is critical. If cv joints/belts were a good way to go I imagine Yamaha, etc would have done it... Anyway, hope I'm proved wrong! 🙂

Great job I would be concerned about the amount of power you are putting through that rubber belt considering contact is minimal through the teeth on the pulleys. But you have a great skill. Could you fit a safety loop over the drive shaft in case it becomes detached. Great videos keep them coming.

That bike without the engine could make a good starting point to build an electric one

looks good ..... dutch people from america

The idea is certainly interesting, I'd like to see how it works on the water

Cool build, seriously should rethink that driveshaft, it’s going to vibrate like crazy.

Yes!! Love these!. So inspirational!

Excelente conocimiento que aportas profesor es tan bueno el video que provoca verlo más de dos veces para no perderme de ningun detalle me encantó 💕 👌 👍 👏

Love your channel! Great fanrication skills! 😎 Its good to see i am not the only one using too much time in the garage on crazy ideas! Keep up the good work Greeatings from Norway 😄

love the yet ski videos :P

Cool stuff man, very inspirational.

i think you should get or make a drill press it will help you a lot when making things like this

on the shaft splicing, use the lathe to cut a small dimple to go into the center of the CV, that way they are centered. Then have a good gouge so that the weld gets into the center of the shaft too

That bike looked so nice :(

Dude u have such awesome ideas!! Very talented!!

I a Yamaha WaveRunner and I have a Polaris 250 2 stroke Air and seeing you doing this I want to make mine

Talking DIY boats, one thing I'm curious to see if it exists: a full-size version of an "outrigger" RC boat. That type of hull should be very fast and not so hard to build.

Lindo Trabajo gran Maestro.gracias.

Thank you for your.method wonderful conversion kits 😅😊

One other thing is I wish we could put our skills together. I've been fabricating over 30 years and extensively worked with Aluminum over the years as well as Stainless and carbon steel.

I'm waiting for the next video... Good job bossku 👍🏻 👍🏻 👍🏻

I like the sprocket adapter, pretty cool!

Heerlijke video om te zien! Puur genieten. Heel erg benieuwd naar het resultaat!!

KZfaq sucks at doing series.... It'd be very helpful to link part 5 Really cool series btw this is amazing

man you must be higher than groceries 🤣😂🤣🤣😂 this is going to be badass man mad respect on your craftsmanship and mad skills very cool my bro we are in South Carolina my brother ♥️💪🏾💪🏾👍🏽👍🏽👍🏽👍🏽😎👊🏽💨💨💥🤙🏽🤙🏽

One suggestion, build a loop around that driveshaft. There are a couple of different failure points in it now, and that last thing you need is a snapped drive shaft trying to send you into a low earth orbit

Now that you have taken out the engine, that would be an awesome project for making an electric bike :D

I found your channel when you released part 1. YOU MY FRIEND do not disappoint!! WELL DEONE !!

Вот это я понимаю моторчик для лодочки😁👍👍👍

Phenomenal work man. This thing is gonna be sweet!!

Nicely made.. love it

The mount looks good, but you should put a system to pull the belt with a screw, that type of mount as a lot of stress in it. Good job anyway!!!

Wauuuu😳😳😳very nice... Good job bossku 👍🏻 👍🏻 👍🏻 👍🏻 👍🏻... 🤝🙏

You should make a shirt that says "pretty good" you have a very unique way of saying it.

Niceeee Watching And Supporting From Philippines

Please put on some face protection with the angle grinder. Your videos are too good for us to wait for you to get out of hospital!

It will work. I love how u use pretty much hand tools to build stuff. Except the lathe. But yes I would use belt over chain. Chain if it broke would blow a hole through the hull, that would be bad. So belt is way better. Gearing on engine you will put it in 6th and leave it there, that's my prediction. Bsafe dude. Love the build

I cant wait to see the final video!!

I think this is a good set up

looks good! i had a car engine (4age) direct drive with some car cvs, (around 7-9k rpm max) it needed high speed cv boots or at high speed the boots turned into pancakes and pushed out all the grease everywhere!

inspiring stuff again from the young master!

Good job,👍

Love this video series, and making me plan to build my own using your plans, a few questions I do have from watching so far 1) how are you going to join the 2 halves of the jetski body together and 2) once the two halves are joined how will you access the engine to service it

Very clever and clean build. I think the driveshaft at high rpm might be an issue but we'll see by the way great video.

Jornt 150.000, Proficiat en op naar de 200.000 abonnees dit jaar nog.

i would have just run a straight drive shaft since your using a belt as final drive you can mount that anywhere really nice work

Love the video! I would consider adding a guard or bracket over the belt to hold the 2 sides of the belt holder on the top looks like it wobbly

I think I would go straight shaft from the engine to the belt and pulleys all on the rubber bushings and the only place you'd need a CV is from the small pulley to the jet drive... That way all the tension and drive forces are confined in the steel frame and isolated and you'd only have the torque from the output of the small pulley to the jet drive actually loading the wooden frame and it would be doing it through rubber bushings... The only real benefit I can see of doing it the way I said is that lord knows how well a VW cv axle will like doing 8500 rpm