Homemade JETSKI part 4: Crazy Engine and driveline 

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!

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.

Your engineering skills are next level

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.

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

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.

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

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.

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

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

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

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!

This is MADNESS! LOVE IT! from Philippines

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.

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

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

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!!

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.

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

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.

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.

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

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

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

THE BEST diy jet-ski ever seen! is loading

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

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 👍🏽👍🏽

Masterful work Young Fella.....Pure Genius

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

Really impressive creativity and skills.

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

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!!!!

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

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

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 😄

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

Yes!! Love these!. So inspirational!

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 :)

Cool stuff man, very inspirational.

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

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

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.

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

So glad I stumbled across this channel. Looking forward to the next video, and as usual, great work!

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.

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 💕 👌 👍 👏

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

Thank you for your.method wonderful conversion kits 😅😊

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

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

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👌🏻🔥

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! 🙂

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!

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 💨 😂

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

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

love the yet ski videos :P

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!

I like the sprocket adapter, pretty cool!

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..

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

Lindo Trabajo gran Maestro.gracias.

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

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

Nicely made.. love it

looks good ..... dutch people from america

Good job,👍

Архімед!!! Голд-хенд!!!👍

Niceeee Watching And Supporting From Philippines

I cant wait to see the final video!!

This dude is Dope, let's subscribe Can't wait for the next video

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

Awesome video again! I am really looking forward for the next one every time!

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! 😄😄😄

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

inspiring stuff again from the young master!

You are so talented! Awsome work! Fun to watch 😃

Вот это я понимаю моторчик для лодочки😁👍👍👍

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

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

Otherwise nice job! thumbs up for you my friend!

Awesome project, keep up the great work!!

Awesome video😁 looking forward to the next one!👌

That is so kool I'm sure it will work💯💯💪🏾💪🏾✌🏾

Awsome job as always, wow has your subscribers base been climbing good for you congrats 👍🏻

Nice job kid, really 👍🏻

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.

Love this build 🔥

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 ♥️💪🏾💪🏾👍🏽👍🏽👍🏽👍🏽😎👊🏽💨💨💥🤙🏽🤙🏽

Beautiful job!

Cool project!

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

Awesome bro.

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

Nice that you for sharing 🤗 🇵🇭

I think this is a good set up

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

Can't wait to see the performance of your creations