RHB31 VZ21 Turbo – Amazon Affiliate link: https://amzn.to/3mMWAAu
If you would like to get a turbo of your own as well as helping our channel, use the link above!
ROTARY POWER MERCH - https://teespring.com/rotary-power-design?tsmac=store&tsmic=build-break-repeat&pid=46&cid=2743
This is episode 3 of the Turbo Rotary Minibike, and we finally addressed some of the problems and shortcomings of our previous setup. We saw your comments (special thanks to Bart on Instagram) and fixed our oiling system by switching the inlet in outlet and adding a larger drain tube. We finalized the “charge pipe” and replaced the old rubber “boost tube” with some proper steel. The wastegate had to go due to space and in this application, it won’t be making enough boost pressure to activate it. We cut apart the old turbo go-kart exhaust to create a custom exhaust for the minibike and then started it up and tuned it! It’s sounding great!!!
Thank y’all for watching, stay safe, and be sure to stay tuned for the next episode, the FIRST DRIVE!
MERCH
MERCHANDISE CUSTOM DESIGNED BY YOURS TRULY
https://teespring.com/stores/build-break-repeat
TOOLS
RogueFab Tubing Notcher
https://www.roguefab.com/product/versanotcher-universal-tubing-notcher/
Pro-tools Tubing Bender
https://pro-tools.com/collections/tube-and-pipe-benders
Optrel Crystal 2.0 Welding Mask
https://usa.optrel.com/en/eye_protection_helmets/products/show/crystal20/
Optrel Grinding Mask
https://usa.optrel.com/en/products/augenschutz/helme-zum-schleifen-schneiden/products/show/clearmaxx/
MUSIC
Music - Background and Montage Music Is From Endemic Sounds
https://www.epidemicsound.com/
Intro Song - Jimmi by Andrew Applepie
https://www.youtube.com/watch?v=l1zHz8pYfyQ&ab_channel=AndrewApplepie
—————PARTS—————
RHB31 VZ21 Turbo – Amazon Affiliate link: https://amzn.to/3mMWAAu
Pulse Pump- https://www.gopowersports.com/round-fuel-pump/?utm_source=YOUTUBE&utm_campaign=Build_Break_Repeat&utm_medium=Video
Seat - https://www.gopowersports.com/19-mini-bike-seat-coleman-ct200-replacement/?utm_source=YOUTUBE&utm_campaign=Build_Break_Repeat&utm_medium=Video

Chrome Shocks - https://www.gopowersports.com/universal-adjustable-standard-shock-12/?utm_source=YOUTUBE&utm_campaign=Build_Break_Repeat&utm_medium=Video
Chrome Wheel - https://www.gopowersports.com/6-astro-wheel-aluminum/?utm_source=YOUTUBE&utm_campaign=Build_Break_Repeat&utm_medium=Video

Inner Tubes- https://www.gopowersports.com/410-6-tube-90-degree-valve-stem/?utm_source=YOUTUBE&utm_campaign=Build_Break_Repeat&utm_medium=Video

Tires - https://www.gopowersports.com/13-x-500-6-turf-tire-2-pack/?utm_source=YOUTUBE&utm_campaign=Build_Break_Repeat&utm_medium=Video
Gold Chain - https://www.gopowersports.com/rk-gold-premium-racing-chain/?utm_source=YOUTUBE&utm_campaign=Build_Break_Repeat&utm_medium=Video

Fenders - https://www.gopowersports.com/4-25-wide-mini-bike-raw-steel-fender/?utm_source=YOUTUBE&utm_campaign=Build_Break_Repeat&utm_medium=Video
¾ Lock Collar - https://www.gopowersports.com/jackshaft-lock-collar-3-4/?utm_source=YOUTUBE&utm_campaign=Build_Break_Repeat&utm_medium=Video
Brake Band- https://www.gopowersports.com/5-carter-brake-band/?utm_source=YOUTUBE&utm_campaign=Build_Break_Repeat&utm_medium=Video

Brake Band Pin- https://www.gopowersports.com/brake-band-pin/?utm_source=YOUTUBE&utm_campaign=Build_Break_Repeat&utm_medium=Video

Brake Cable and Lever- https://www.gopowersports.com/mega-mini-bike-brake-kit/?utm_source=YOUTUBE&utm_campaign=Build_Break_Repeat&utm_medium=Video

Jack Shaft Sprockets - https://www.gopowersports.com/12t-jackshaft-sprocket-5-8-bore/?utm_source=YOUTUBE&utm_campaign=Build_Break_Repeat&utm_medium=Video
Jack Shaft Lock Collars- https://www.gopowersports.com/jackshaft-lock-collar-5-8/?utm_source=YOUTUBE&utm_campaign=Build_Break_Repeat&utm_medium=Video
Jack Shaft (10 inch with lock nuts and key) - https://www.gopowersports.com/5-8-threaded-jackshaft/?utm_source=YOUTUBE&utm_campaign=Build_Break_Repeat&utm_medium=Video
Grips and Throttle - https://www.gopowersports.com/throttle-twist-grip-7-8/?utm_source=YOUTUBE&utm_campaign=Build_Break_Repeat&utm_medium=Video
Clutch - https://www.gopowersports.com/10t-3-4-bore-centrifugal-clutch-41-420/?utm_source=YOUTUBE&utm_campaign=Build_Break_Repeat&utm_medium=Video
RLV Muffler - https://www.gopowersports.com/rlv-4104-1-5-16-exhaust-silencer-with-hd-ss-clamp/?utm_source=YOUTUBE&utm_campaign=Build_Break_Repeat&utm_medium=Video
Weld On Tabs - Amazon affiliate link: https://amzn.to/2XOoIIv

Oh so, as you saw in episode one and two, we made a lot of progress on the turbo, but we didn't know if it would work. So a lot of the stuff was temporary and it was kind of a rush job, since we only had one weekend before we had to get back to college. So in this episode, we're just going to kind of tie things up, pretty it up and before we can get to driving this thing. So obviously, this boost pipe was temporary for one it kind of expand with the pressure and another thing is we're pretty sure this thing is not fuel rated, so it would probably deteriorate and like get into our engine so yeah.

This thing needs to go yeah, we'll just replace it with some metal piping it's going to emit, so this is our old oiling system setup. Thank you guys for all your comments. We went back and looked at the diagrams and we did have our oil inlet and outlet wrong, so we had like the petcock going into the small side and then like a release or the big side and then a really small drain, but um so yeah. This is the oil inlet and has two really small holes inside there, and then this is the oil outlet, so we had that backwards, so yeah we definitely fixed that.

So we did get some comments about wanting to have an adapter here, but we're thinking i mean if we had some sort of adapter our car would probably be out all the way out here we could make a 90 degree one, but then that's going to interfere With our future boost piping - and you know the flanges line up - so you know, i think, we're totally okay with just bolting these up, but we'll pull this carb off right now, and hopefully we can clock it to where our kind of uh our outlets of the Turbo is a little bit more over here that way, we're not going all the way around town we've just about got the compressor housing unbolted, so we're gon na you know take this off, have to reclock everything, and then hopefully we can rotate this a little bit And have it be a little easier to attach so yeah? We will have to do some resealing, but we figured we'd. Take it off anyways, pretty cool yep. It actually kind of looks nice uh. The bearings seem you know normal honestly, we haven't ran it much! No chunks of steel, okay with the old switcheroo perfect, that's how she needs to be before we can put the compressor housing on.

We need to basically modify our wastegate here, because we we're not going to use our wastegate we're not going to get enough pressure to be able to actuate this wastegate, so why we even want to keep it. So what we're going to do is we're just going to cut it here, because this wastegate mount actually acts as a clip for the compressor housing so jason's just we're going to just cut it out, yeah right along there. So we got this back on. Put some yamabond in here clocked it right this time now we'll tighten her up, it's a little funky, but we figure.

If we just go with a 90, it's not going to be very invasive at all and we'll be coming right down in this direction. We want to do that instead of having like the carb way out here, so because this needs to be level up in here, but it's looking good, alright guys. So now the challenge is we got to go from our uh outlet here to the inlet on the motor. It's actually not going to be too bad.
I think we can pull it off with two 90s. Another thing is our chain is going to be right here. So we need to kind of stay out of the way on that we'd like to keep it towards the inside. But our idea is first we're going to chop this and try to get it here and then, if you can kind of imagine with me, this is kind of lined up.

So if we had another 90 in here, we'd be right on track, so yeah all we need to do is bend this up so that it matches with this point and then we know our bender adds three and seven eighths to it. So we just mark where it needs to be subtract that, and it should line up perfectly with that this isn't that hard be close to 90. all right moment of truth. I know.

Y'All are gon na, be super sad to see our boost tube gone but um wow that looks good yeah. Actually, it's gon na fit pretty well, so we got a thin layer of yamabond on and now we can bolt this right up switch a lot better than the tube yeah. I'm gon na miss the tube. That's looking pretty good a lot better wow! So we'll get this bolted in and then over here we got the exhaust side and this is kind of the old plate.

We had off the 60s cart um that we turboed and you can just see it's kind of already made. So it's ready for go power. Sports pipe so we'll just cut out a go power sports pipe and get that guy around. That looks so sick all right, so we don't have like a specific turbo mount.

We do have a lot of weight on these two bolts. We do have this pipe kind of helping stabilize it, but we want to just take a little bit of this uh leverage off of the turbo. So i mean we just got this really thin piece and we're just going to mount that right. There doesn't go in yeah, that's the idea.

Yes, okay, got that tight so and this is tight as well, so we kind of have it bolted up here we have our little support and we just got to tighten this little muffler up rlv from go powersports. Of course um yeah, but after this we are ready to kind of turn fuel on and stuff like that and see how she sounds. It's gon na be awesome, so we got this thing all full of gas and oil um. We still have the pekka here, but we open it up all the way, so it should be basically normal, but before we go back to college this weekend, we do want to just hear it and see if it actually works.

So it goes. Nothing is choke on. Oh wow, okay, here we go okay, so so so alrighty. So with that this thing runs amazing, guys, um, we're super happy with it.

We haven't had any pulls under boost, yet so we're kind of just with that basic air fuel mixture. We have plenty of smoke under rev and stuff, so we're not really too worried about this thing, and i guess the next step is actually just ripping it so stay tuned. For the first drive of this thing, we wanted to get part three in the first drive and the third video, but, as you guys saw - and you know, i hope, you're glad - we answered a lot of the comments and thank you guys too um. But it is way better than we had before, like just haphazardly having like just that, like rubber pipe and stuff on a turbo rotary mini bike.
You know we shouldn't have done that anyways, but it's all fixed now, so thank you guys for watching should be sure to stay tuned for next time when we rip this thing for the first time you can hear this turbo spool up and stuff. Thank you. Go powersports follow us on instagram at buildbreak. See you next time.


Avatar photo

By YTB

26 thoughts on “Turbo d rotary minibike – finishing touches! episode 3”
  1. Avataaar/Circle Created with python_avatars richard nickens says:

    Not trying be funny but I see why your leg broke u had a boot on in the beginning of the video! Word of advice stop telling people hold my beer🤣🤣🤣

  2. Avataaar/Circle Created with python_avatars William Soong says:

    Both of you seem like honest solid dudes. Don't see much of that nowadays
    Love the content ✌️

  3. Avataaar/Circle Created with python_avatars Kenneth Moles says:

    That is certainly over the top and should win the "Pure Wicked Award"!!!

  4. Avataaar/Circle Created with python_avatars Hossein Golchin says:

    you are pros, my heroes, i hope one day i could walk the steps you stepped. I really need to save money for those days, wish me luck ! 🙂

  5. Avataaar/Circle Created with python_avatars Nakiah says:

    I’d put a bigger exhaust side on it. I think you’re restricting it

  6. Avataaar/Circle Created with python_avatars mike design says:

    muy buen proyecto, hermoso motor felicitaciones, saludos desde argentina!!!

  7. Avataaar/Circle Created with python_avatars Ryan Schanfish says:

    I haven't seen one of y'all's vida since the rotory cart. Those locks tho bro!!!

  8. Avataaar/Circle Created with python_avatars Capt Tom says:

    I never doubted it! I might be old……….but I wanna ride it!

  9. Avataaar/Circle Created with python_avatars Robert Peters says:

    if using a bit of 2-stroke olie in the gas will help lifetime a lot

  10. Avataaar/Circle Created with python_avatars Levi Hutchins says:

    I’d put that wastegate back on. Any turbo has the potential to over boost and that wastegate at spring pressure is always a fail safe. Cool build tho 👌🏻

  11. Avataaar/Circle Created with python_avatars Greg Gillham says:

    Nicely done guys. Looks good. Look forward to seeing you guys rip it up.

  12. Avataaar/Circle Created with python_avatars Ben Morrow says:

    Can you answer a question for me, from a old video of the c10 shop truck what size tires and rims and moon caps are on it? Thanks

  13. Avataaar/Circle Created with python_avatars Nexanti says:

    Hey this is prity huge, you need to weld the wastegate flap closed or your not going to get any boost

  14. Avataaar/Circle Created with python_avatars K. Irwin says:

    Looks sick should be quick. Only thing is I hope the chain don’t break cuz you won’t have any brakes

  15. Avataaar/Circle Created with python_avatars Chris Builds says:

    Hey man gotta cut the hair and get rid of the hair band you look like little red riding hood except a brunet

  16. Avataaar/Circle Created with python_avatars shawn Lasky says:

    Why is thier a break band on the clutch your supposed to keep at much heat as you can away or out of the clutch so your not blowing clutches

  17. Avataaar/Circle Created with python_avatars john smith says:

    Lol unfortunately adding the turbo in this manner will give you absolutely zero extra power or torque. if you want the turbo to work on a small engine like that you absolutely have to build an expansion chamber in between the turbo and the engine otherwise you are just building a complicated expensive paperweight.

  18. Avataaar/Circle Created with python_avatars raph rath says:

    to be real you guys should really get it fuel injected somehow. mechanical fuel injection would probably work fine

  19. Avataaar/Circle Created with python_avatars Lewis Heilig says:

    All I can honestly tell y'all is I'm jealous as f*** and where did y'all get that motor from man eBay or something and what's the average price on them please do let me know thank you

  20. Avataaar/Circle Created with python_avatars Braptastic films says:

    What mixture are you guys running? Make sure it’s got plenty of oil, would hate to mess up that motor

  21. Avataaar/Circle Created with python_avatars pizzaboy03 says:

    But like a small lever on the handlebars that manually actuates the wastegate for BOOST!

  22. Avataaar/Circle Created with python_avatars Tc125 says:

    I don’t know what oil and fuel you are running but look into klotz super techniplate and run it 32:1 or 40:1 and vp t4

  23. Avataaar/Circle Created with python_avatars isaac milford says:

    Its only cool if it works. Do a boosted pull and go back to college.

  24. Avataaar/Circle Created with python_avatars Make It Fit says:

    I put a turbo and a supercharger on my single cylinder industrial engine minibike.

  25. Avataaar/Circle Created with python_avatars daktah says:

    the wastegate actuator also has the job of holding the wastegate closed while below its boost threshold, so by removing it youre allowing the wastegate to do whatever it pleases and exhaust is going to push it open and kill any spooling. be sure to jam it all the way closed if you want any chance of building boost.

  26. Avataaar/Circle Created with python_avatars Oliver Scorsim says:

    Still needs a real oil pump but I'm very glad to see you guys listened to the blow through advice but here's some more knowledge throw that air filter off it won't flow 10hp well and throw a 180 main jet in to start. Should rip pretty good but I would try to redo that charge pipe so its down hill from the turbo and it can idle for a while without loading up. Don't try to hit boost with that tiny main in either it will get lean and last that carb looks tiny for the application 😂 I started with the same thing basically but quickly learned a 36mm mikuni really freed up power up top and made hitting boost faster and easier. It also made boost matter alot more and started to actually make power I was expecting but idle quality went way down hill.

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