Rotary Shifter Go Kart TOP SPEED! | Rotary Motorcycle Kart Ep 8

Optrel Welding/Grinding Helmets:
-Crystal2.0: usa.optrel.com/en/eye_protect...
-Clearmaxx: usa.optrel.com/products/augen...
Today we drive the rotary shifter go cart on the street and do a top speed run! This rotary go kart is powered by a 1975 Hercules W2000 motorcycle and is a complete monster for this small go kart frame! In order to get this thing running and driving again we had to remake an exhaust system using a cheaper amazon muffler, we also needed to weld up a system to keep tension in the chain. This kart is also rocking the 787b Renown livery of the 1991 Le Mans car. While it doesn't seem like much, it took us hours to get everything up to spec. After it was ready to go, we took it out to some abandoned roads and really let it get up to top speed! This go cart hit a top speed of 80mph and it was absolutely crazy to go that fast so close to the ground! Thanks for watching and be sure to stay tuned for some more ripping this thing! (re-gear video coming very soon!)
*Be sure to check your local laws before driving any non-registered motorized vehicle. Do not attempt these activities at home. All content produced by Build Break Repeat is for entertainment purposes only*
---------MUSIC --------
Music - Background and Montage Music Is From Endemic Sounds
www.epidemicsound.com/creator...
-----------MERCH------------
MERCHANDISE CUSTOM DESIGNED BY YOURS TRULY
teespring.com/stores/build-br...
------------PARTS--------------
DG Aluminum Silencer - www.dgperformance.com/motorcyc...
Seat - www.gopowersports.com/12-volt...
Battery - www.gopowersports.com/12-volt...
Axle - www.gopowersports.com/axle-54...
Bearings - www.gopowersports.com/3-hole-...
Rear Wheel Hubs - www.gopowersports.com/1-hub-d...
Front Wheel Hubs - www.gopowersports.com/front-h...
Brake Disk - www.gopowersports.com/8-brake...
Sprocket Hub - www.gopowersports.com/1-bore-...
50 Chain - www.gopowersports.com/150cc-d...
Tie Rods - www.gopowersports.com/tie-rod...
Rear Wheels - www.gopowersports.com/6-x-8-5...
Front Wheels - www.gopowersports.com/6-x-6-5...
Rear Tires - www.gopowersports.com/11-5-x-...
Front Tires - www.gopowersports.com/11-x-6-...

[@Sky-qd2mf]

You could probably get 90-95 out of it with perfect gearing

[@BuildBreakRepeat]

Sky Yeah, we probably won’t test our luck with another top speed video but it definitely has the potential. Top speed of the w2000 was 90 so we are close I think.

[@caveman6345]

With good gearing I think he could break 100mph, that rotary starts making power in the mid high rpm range.

[@leeviisola638]

Test it in the Air field

[@dustinhendrix1510]

I was jus gonna say put a turbo🤷🏻‍♂️ why not lol

[@nickd935]

@@dustinhendrix1510 bc thats just TOO fast😂

[@calebreboulet4512]

Dude this cart is insane, also you should go to the drag strip and test this out

[@deadguy237]

Would run 13s with a good lanch mabe

[@hunterpetrovich1460]

@@deadguy237 maybe 14s

[@deadguy237]

@@hunterpetrovich1460 tryin to be optimistic here

[@hunterpetrovich1460]

@@deadguy237 nothin wrong with that

[@IvanU90]

Or down an airstrip somewhere would be sweet! Definitely needs to be geared down some for tracks and cornering tho. Just not so short you have to shift every second!

[@RichieBlaze1]

Love the editing for the intro. Rotary's are strange things lol. The new exhaust looks and sounds way better. This is the coolest fucking kart EVER!!! And now that it's almost dialed in, I can't wait to see what you guys have planned for it. Definitely a very unique build with a lot of time and heart put into it.

[@Nico-ds9nz]

How did you find this engine? This is from a Hercules Wankel g2000, not even most Germans know this motorcycle or this engine

[@BuildBreakRepeat]

Craigslist...we just got super lucky bought it from a guy who didn’t know what he had. It was in horrible condition and it took tons of time and money to get back but we love it so much now and are complete rotorheads from it 🤙🏻

[@Nico-ds9nz]

@@BuildBreakRepeat yes I love the cart 2. I wish I could have also a kart like this. 😍

[@octane613]

@@BuildBreakRepeat I just hope you guys don't blow it up, because we all know youve done your research while finding parts, so you also know you'll never find another one lmao.

[@simont3686]

It's W2000. And I'm in Germany and nearly everyone knows this thing.

[@Nico-ds9nz]

@@simont3686 ne niemand Kennt es außer Boomers. Wer sollte es kenne, niemand fährt so einen hobel, das Motorrad ist auch scheiße, nur supermoto taugt was. Aber der Motor ist geil....

[@lockjawjak]

first! This cart has got to be the coolest cart ever. Time for a twin rotor build!!!

[@dannitron1934]

You know where to get this engine from?

[@bobwhite5440]

80 mph is plenty stout. glad to see you are stepping up your safety gear and practices in the shop and during vehicle testing.

[@bradleyj.fortner2203]

You guys ought to get with John and Isaac and see about a drag race between this and the Ducarti. I'd love to see that.

[@NellisNelson]

Bradley Fortner c&c would just whine about how their poorly planned whatcha-ma-call-it prevents the Kart from being reliable and why they can’t race/ are the underdog while ignoring all of the solid fan suggestions. These guys are the real deal and are always improving them selves.

[@bradleyj.fortner2203]

@@NellisNelson I'm not that critical. I like both channels and they both have really fast shifter karts. I think a crossover video of them racing would be cool. But my comment isn't getting many likes though. So, I must be in the minority 🤔.

[@CubeHsiao]

From Sachs, Norton, Mazda, Rotron to you guys! It’s always the spirit of rotary engine!

[@AT_motors]

That exhaust sounds so much better than the other one. Nice job

[@lowpricedpaint]

Definitely the most unique cart out there. You guys did a great job, the cart is awesome! I'm betting 100 mph is possible? Be safe.

[@BurnoutEyes]

Moon Hitsearth Shifter karts will do 100mph. This thing will probably do over 100mph

[@lowpricedpaint]

@@BurnoutEyes probably so?

[@Thijs_NL]

In the old days, my friend had a Peugot Speedfight, that did 90MpH, with an tiny engine (2 wheeler, but still). This thing must be able to go a lot quicker with that engine, and gears.

[@goldminegaming6242]

I had a Honda Wallaroo. It was 50cc with a 36mm carb and a polini variomatic. That little fucker reached 105km/h. How many CC's is the speedfight?

[@Nunya_Bidnez]

Dope as hell and the sound is amazing as well. This is the sickest build you guys have done to date. Be safe and stay out of trouble.

[@theozman38]

That cart is insanely fast. Holy mackerel. Lol. Looks like a lot of fun. The law has to spoil everything. Glad you didn’t get caught. Somebody snitched on you guys. 🤬people

[@mixonmachines]

Holy cow 🐮 that’s was awesome 👏 80 mph !!! That’s movin some biscuits!!

[@chvfrk]

Eh guys You should use the volume metric space of your cylinder as a base for your header pipe space before your muffler, and make sure your muffler has the right amount of flow for the type of motor you're running, just helpful hints in performance aspects of what you're building

[@thegenerousdegenerate9395]

It looks like you guys need to change your gearing. Just a lil bit. Your taking too long to get to your shift points and its not running out the top end as well as it could be. Its real close though and looks/works amazing. You guys have done an amazing job with this kart. Just fix the gearing and pleeease touch up that livery! Its so cool but so wobbly! Lol Cheers!🍻

[@thegenerousdegenerate9395]

I should probably stop commenting before the videos done. Lol

[@bomblifenewzealand]

The Generous Degenerate yep

[@saltwater102]

Awesome work guys! Loving the updates.

[@jlucasound]

80 MPH. You did it! Glad you got out clean.

[@evanfield580]

Definitely one of the coolest go carts i've ever seen.

[@randallburgess46]

Exiting ride! Nice build!

[@blair384]

Awesome guys

[@lengaming1651]

I cant get enough of this thing dude

[@chnsx7]

I LOVE IT!

[@wimnathaliebosman9797]

Well done 👍

[@cskalle1213]

Now thats a fast kart!!

[@larryneyii2162]

Great job !!!!!

[@cassiusdante2216]

Outstanding

[@RobertPyland]

Faster than the speed of Brapp. Insane. Nuts. Crazy. Beautiful.

[@synchro505]

That was a fun ride. Nice work.

[@leonardoborges8474]

What a sound!!!amazing project!!

[@joseph5402]

One word INSANE

[@bryduhbikeguy]

Awesome guys! Time for a Drag Strip Rip !

[@jlucasound]

You guys are evolving faster than Humankind itself. Very impressed old man.

[@LegacyThoughts]

Nothing but love in the comment section. Is that possible in 2019?? Cool cart, nice work guys!

[@jvander115]

Love the Kart you guys are awesome keep up the great videos !!!!

[@austindorf83]

That thing looks scary fast. Nicely done, guys

[@coreygranger4128]

Cool as hell man

[@caveman6345]

Good stuff y'all

[@backwoodsriders1879]

Love new exhaust

[@fullmetaljacket7]

Sounds exactly like an RC plane 2 stroke engine. That sound brings me back good memories!

[@dangerousdoggo5465]

racist

[@silentdeath9237]

Turn the air cleaner and carburetor forward and make a ram air box.

[@mingusbreeze]

Wow, guys, that kart is bad ass! Thanks for the great videos.

[@samsgarage1716]

Wow that’s fast.good job guys

[@HEKTIC458]

Damn thats fast

[@trevormiller1366]

I'm surprised that the carby hasn't been turned around 180° and a scoop put on for a better intake. Still it's a sweet ride, well done! 👍

[@jok3yjesu339]

God damn that thing is fast

[@connoisseuroftigolbitts]

This sounds awesome I’d love to own one and take it to 7’s day next July

[@DougL12]

So cool

[@floatncoffee]

That thing sounds saaweet 👌

[@Jobes03]

5:23 Nice

[@anibalbabilonia1867]

Whoaa! That thing is a beast!😱✌😎👍

[@DCDLaserCNC]

80 MPH! Nice!

[@jlucasound]

I was just at Rather B. Nice to see you guys there. Awesome Buggy, Huh? Now we get to see the Rotary. I love this kart. Don't think that my mentioning RBW lessens the AWE factor of you young men. Nothing could be further from the truth. OK, I am now starting the video. I can't wai

[@jacksoncamporin5303]

Love the livery

[@tazyt3388]

Hauls balls guys great build u got ya kart done rite n solid very impressed cheers

[@reggiedix4602]

Iight now take it back apart and Bridgeport or streetport that bad boy!!!! Awesome build!!!!

[@4-ROTOR]

RX-GO kart. I love this Rotary

[@NOAH_HINMAN]

Yo that cart is insane lol I need to try it

[@randyhertzberg7549]

congrats to you guys also , on a great build ! WOW ! can't wait to get my 250 ninja kart out

[@ukueleforlife]

Just started watching your videos this kart is awesome! It was crazy when I started this video though I know exactly where y’all are at!

[@darylparker9393]

Congrats guys! 10mph faster than I guessed. Keep up the good content.

[@buddylee19082]

I just wanna commend y'all on having some GIGANTIC SOLID BRASS BALLS!!! Going 80mph, in a Kart, on a back road like that is absolutely INSANE!!! And I don't mean because of traffic; the conditions of roads like that, are just super sketch! I salute you! Btw it's got a lot more speed in there too, get that on a proper track or some fresh blacktop with a proper straight away and I'm thinkin 90+ no problem..?

[@buddylee19082]

Ok, so I obviously posted that ^^^ comment before watching the entire video; you gotta change the gear ratio. And idk what y'all are gonna decide but it looks to me like it needs the acceleration (shorter) more than it needs the top end (longer)? I'm thinking shorter gears will still get y'all in the 90+ range, they'll just get you there a lot quicker..? Cause in both runs it appears you're running out of road before you're running out of gears, so they're clearly too long. So; as is, you might get 100mph, with enough road and the right wind conditions, but, the question is how much road will it take? And let's be realistic; how often are you really gonna see TOP Speed anyway? I'd go for the shorter quicker gears with a top speed of 70-80mph and have something that can out accelerate a Tesla and turn on a dime, over a 100mph top end any day! Regardless of what you decide, this thing is EPIC!!! And I'm so happy to see all the hard work and commitment finally paying off for y'all! Congrats fellas.

[@kcraig51]

I'm 51 years old....I gotta admit....I like it!

[@prophez23]

That’s easily a 100 mile an hour cart once you get the right gearing. It doesn’t even seem close to be fully wrapped in 6th gear. But then I’m not familiar with rotary engines and what they’re able to handle. But it’s definitely an awesome beast!

[@skitz5441]

A little hp tip; change the way the intake changes to directly forward and find a free flowing filter that doesn't block the air flow straight to the carb intake, will help all over the rev range look up 'ram air effect'

[@paradisepools6223]

The engine weighs too much to get going that fast. The 100cc Yamaha cart I have would smoke this thing but it's still super rad. Good work fellas!!! 👍

[@chrisiollich4890]

Get it On!!!!!

[@alcopower5710]

It sounds so good. Awesome video......more rotary content please lol

[@wilperez9127]

Nice job buddys,make the engine bridge port or pheripheral port and exhaust port.advance + timing.sorry for my bad inglish from Puerto Rico.Home of Fastest Rotaries.

[@captainflatspot]

Sounds very nice!! and it got the looks too =)

[@stephanelanglois6140]

omg what a beasty ride 💪🏻💪🏻💪🏻👍👍👍

[@michael_jullie2836]

Dude this thing is bad ass 🤯 80 mph ‼️‼️‼️

[@lenniesatterlee3685]

That's fast

[@sbeve9820]

love the color sceme, reminds me of the 787b

[@andyshaw8334]

Omfg if that thing was a bit snappier off the mark !what a engine that thing is awsome its like a 2 stroke bit 4 stroke lol power 💯❤👊🏼

[@7.12_am]

SHOOT, HE'S DONE IT

[@mikesrcgarage]

A Rotary engine is basically a 2stroke. Maybe a 2stroke chamber pipe and tip would make more power!? IDK... but something to try! I do know usually Rotary engines can turn very high rpms that setup doesn't seem to be taching out!

[@patchouli3422]

Dorito Kart is the one thing I never knew I needed in my life.

[@Genxpoppy]

Can't beat that sound, awesome man! Check out the aixro rotary they are hard-core 50 cc and 49 hp stock.

[@Genxpoppy]

Love your cart though Suzuki motor he'll yeah!!!

[@exsee.mer__2357]

Bwaaaaaapppppp,bwaaaaaaapppppppppp, bwaaaappppppp ah i love dat sound🤣.

[@jamesblanco4843]

TURBO IT !!!!!!!!!!!

[@RobertNES816]

If only a company made smaller sized 2,3,4 and 5 rotor engines lol. That would be awesome!

[@KillaMTB]

You need to take this to a proper track

[@chrisguglielmoni2202]

It’s like Mario cart, watch out for the obstacles !

[@danw1955]

Heh heh, that lil' Dorito pulls pretty good, but yeah, lower gearing (a couple teeth) would really make a difference on bottom end, and let you run 6th gear out. Nice work you guys!😁👍

[@R.N.GPerformance]

pretty fast guys i would slow it down a bit and make it a little funner to drift like you said.

[@averagecarguy420]

that enslaved dorito is doing goooooood also 900th like

[@nikolasramberg548]

I like the stranger things style intro lol

[@driftenhard5091]

yyyaaaaayyy new vid

[@bartengelen3536]

Would like to see that geared down! Should drift really hard

[@furiousfred4934]

Wicked build, guys. One small thing though... The intake position. Would it do ya any good if you'd build an airbox 'round the filter, with a pipe directing the airflow right onto it? To creat a ram-air-effect i mean.

[@efini_fc4276]

They would need to increase the fuel delivery properly. It's possible but not sure about the limits of their fuel set up. RE's really don't like lean conditions. It's pretty safe right now. More air and fuel will need bigger ports and more work. Simple things but should be planned out well to keep it healthy and running.

[@waggy401]

You should bring that out to Bonneville!

[@bessakart_]

Show mano...

[@jamalsealy150]

Turbo 💯💯💯💯💯

[@saschakorner9317]

I almost shit my pants, as hed driven over the holes in the Asphalt..... XD

[@itsmevoltron6334]

Need to find a road track🐶🏁

[@jnljnl8485]

Just needs turbo. boost is a must in rotary life.😂

[@lokeyPG]

She definitely has more then 80 in her you guys really make me want to build one

[@jcramond73]

When it comes to chain tensioners I use the same principle as a fan belt tensioner and the results are not too bad.