DIRTBIKE WITH ROTARY ENGINE (Hercules Wankel 502 GS)
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- Опубліковано 6 вер 2024
- The Hercules Wankel 502 GS was the first production dirtbike motorcycle using a Wankel motor. The first models used a two-stroke mix in the gasoline to lubricate the engine, which was later upgraded to an oil injector. About 1800 were sold under both Hercules and DKW badges between 1974 to 1976. In 1977 they sold all their production tooling to Norton. The exhaust port is on the right-hand one-third of the rotor chamber. The pipe goes up and over and exits on the left side of the bike.
Hercules built a few off-road Wankel-engined motocross models, for the ISDT and for their US importer Penton Motors. A few of these showed up in the USA, but they are very rare. The crankshaft was mounted nearly vertical, presumably to give a shorter wheelbase and better cooling, and while the engine might look like a traditional two-stroke, a close look reveals that it is a Wankel.
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Thanks to:
Manny Bernardez
wankelgs
Klaudya155
morini500dave
That sound! Low rpm its like a 4 stroke get the revs up and its like a 2 stroke. Love it
Yeah but it is a stroke lol
@@orpsiesclips5823 it's a 3 stroke no?
@@lemonnchico more like a one stroke
@@aidanhammond2390 nah think about it some more one stroke wouldn't move I think
@@lemonnchico One spark by chamber and by rev...
= 2 stroke
Hi everybody, I'm the lucky owner of the blue 502 GS who is wearing the grey polo while riding the bike.
I would like to thank very much Dirt N Iron for this great video.
I'd like to tell you the difference between the W2000 bikes sold from 1975 to the general
They were equipped with the type KC27 Wankel engine.
Eleven engines were made and there are only 5/6 left of which only 2 are still in use.
The second 502 was in the hands of Herbert Scheck.
The crankcase is a Sachs Seven with the MX 5/6 speed gearbox (basically the 1st gear was
My bike, 297cc, has 39 hp at the wheel and a torque of 3.3 Nm which is almost constant,
almost like an electric engine.
On my wankelgs channel you can find more footage of the bike.
All the best
Marcello from Southern Switzerland
39 hp is too much for a 300 cc
WTF Man😲😲😲
@@hackd6959 You can come here and test the bike. It's not a normal engine, is a Wankel.
@@wankelgs how much miles per gallon 😂
@@hackd6959 probably 3 haha
I'm just seeing you now lolz 🙋
Surprised how much it sounds like a 2 stroke under load but has that great rotary idle.
More like a bmw boxer but with a bit of 2 stroke sound
If u think a bit... its like a 2 stroke
Well it is more towards 2 stroke than 4 stroke only from the fact that it hasn't got valves and it runs on premix
Could you imagine one of these with a small 2 stroke pipe? Would sound incredible 🥰
Rotories fire every revolution like a 2 stroke
I raced rotaries they are amazingly smooth and rev forever great memories. Suzuki had the best one in my opinion the RE5. Only after using a rotary you can appreciate the difference to the traditional piston engine 👍
This is fact. And everyone says they’re prone to blow but taking care of them whenever they need helps a lot
What an ace sound! shame they never went further..
Can't compete with the 4 strokes or lighter 2 strokes
@@ianmangham4570 but don't you think with modern tech the could have made it better and better?? I don't know any better so I'm just asking out of curiosity...
@@travismoon5290 Nah, rotary engines are far too inefficient.Think about how many modern day cars and bikes have rotary engines!
@@travismoon5290 they have similar efficiency to 2 strokes and should have better reliability Mazda made their apex seals last over 40,000km while most dirt bike need a full rebuild in less than 1000km I know it’s a car but even the 787b lasted 10,000km without any engine problems at lemans also they can be made more compact and lighter than a 4t while having similar power to a 2t the engine would only work in a race bikes like 2 strokes
And also it’s a 4t engine so it would be aloud a higher displacement than a 2t
Curious how the rotating mass of the engine affected the handling. My Dad was a mechanic for Mazda his whole life. I inherited his 72 Rx2 SCCA car. Nothing sounds like a rotary. Those bikes are bad ass.
It has a little bit of a rotary idle
WOW!This one is a complete surprise to me having lived,studied and drooled over ALL things motorcycle and Wankel for 50 years.Iv even bean building my own Wankel powered mini cycle.
i'm on earth for this byautiful sachs technice , i have a deep respect for sachs and puch zundapp etc. since my youth . god loves rotary engines think !
I like that you put in some information and multiple sound clips of the bike, exactly how a video like this should be!
Man, that sound and all the guys laughed from their hart! Interesting I didn't knew about Wankel powered bikes. Seems like the transition from idle/low rev to revving up was jerky, but the unstoppable 😂. Nice vid!
Sure they laughed like I did too -- from the element of surprise, just from the same reason you said (idle to high revs) because it's just fun to watch it perform so nicely 😊
it needs too blubber like twostrokes do foor lubrication and after all cooling.
few peopple understand that it is there to help the engine run coool and fine. btw i also heard the guys laughing from thyer hearts haha
Such a gorgeous sounding machine!!
I admit to this as a lifelong two stroke fanatic and addict.
Thank you very much for the vid.
Two strokes are forever!
But I do wish this tech would make a come back as well.
God i love this so much. Never knew about this!
incredible engine!
Wow I’m baffled at how snappy that motor is! Sounds awesome too!
Yeah it's very snappy for a bike from the 70's
Yea, we used to call em; "no-strokes" back in the 80's, then the piston-driven 2-stroke bikes, were more popular and easier to work on, and were the bikes to have! (Suzuki, Kawasaki, Honda, Yamaha, Husqvarna, Maico. I remember the winningest motocross racer at the time. it was Roger Decoster, on his Suzuki RM 500cc. (He was champion for many years in a row!)
Those were the days, to be growing up!!
Bring them back !!
My dad bought a new 1970 Arctic Cat snowmobile with a 303cc Wankel. I still remember that whine of the engine at high rpms. It only had 20hp and it would top out around 60mph. Had a lot good times on that ride.
Amazing sound a mix between 2 T and 4 T : the 3 T ?
Would be interesting to see this engine in a modern moto cross build ....
2 and 4 stroke is a name based on the working of the engine. Calling this a 3 stroke wouldnt make any sense, sorry its a NO!
@@ramonvdt7666 man i know how motor engine work , i was just joking , i was talking only about the sound ...
@@gargamelgargamel2483 rotary engine does not have strokes as traditional bikes more like an vintage turbine engines
@@syedasim8640 yes yes , i understand this , i saw many articles about rotary engine and Hercule engine .
Its just kind of jock . But it will be very interesting to see a swap engine in a modern motocross ...
No stroke,0T.
That's the best sounding bike in my opinion
Man,i want one of those.in 1976,i hada mazda truck with a wankle rotary,i had a racing header installed and the exhaust modified,and that little truck would FLY!!!
I'm surprised that I never saw this version of the Hercules bikes back in the 1970's when I used to go to Little Hocking, Ohio. The shop there had some of the first I.S.D.T. Hercules bikes from the factory being set up FOR I.S.D.T. and the very first 7 speed 250cc and 350 cc machines came through that shop, Harold's Cycles. They were die hard euro bike (Harold was a 400 Husqvarna WR w/straight [no offset] axle forks purist) folks that gave me a LOT of help in dialing my old Sachs and Zundapp powered bikes into something very useable as well as some of the Absolute Coolest stickers from around the world of enduro/I.S.D.T. (now known as I.S.D.E.), Thank You !! : )'
Unusual for a such type of motocross bike, acceleration seems to be fast enough.
They sound awesome!!! 🛵🏴🏴 Never heared one in a dirt bike before.
I had no idea that there was a rotary engine in a motorcycle. Very cool!
It's normal, it was a complete fiasco
That is the coolest dirt bike i have ever heard.
I want one, i really really want one.
i want also, but its hard to get one :(
One of these motors in a crf150r/f or ttr 125 frame would be next level js
I really want to hear a rotary with a expansion pipe 🔥
aaahhhh me too bro
the lawnmower has a big volume muffler it sound more to my heart (Y)
no transfert port on the Wankel, so no expansion pipe
One of my clients owned a Suzuki dealership. He had a new unboxed never registered RE5 . Suzuki called him knowing it was never registered and wanted it at all costs . His bother had sold it 7-8 years back before the call . He relayed this to me about 2 years ago . He factory raced in 1969 and 70 . He also told me he sold a ton of kalana's back in the day .
Compare with that:
HIGGSPEED 3 INTO 1 SYSTEM FOR SUZUKI GT750
on youtube
By forgetting the high engine rev.
Because the Wankel has low RPM only.
Hercules is 294cc x3 = 882cc
Sick bike 🔥🔥
So,could we call it as a 3stroke? 🤔
1 stroke 👍
@@chipsnpeasifuplz a gun is the only true one stroke.
0 stroke
could call it a 3 cycle but not stroke as there is no piston to have a stroke
@@johnsmith-nl3js thinking about this has just given me a stroke!!!
That is so totally bad ass.... I had a pristine Hercules 250 1977 6 day Enduro 7 speed that was mint from an auction in Vegas it had 112 original miles on it They told me not to ride it or the speedometer Needle would break And it did fall offI ended up selling it to a guy who owns a Read valve company for his office My bike was red it may have been a 1976...
That sound is awesome. I want one.
hey this is crazy i'm in love with this engine its superior omg the sound the principle top cylinder ventilation and the sound of a twostroke and a fourstroke it is realy better than both
The 502GS sounds like a combo of a big bore 2 stroke and a 125 2 stroke with some 4 stroke on the bottom...Awesome...As a KX500, Husqvarna 360, 390 and 400 owner I love it...I wonder if it has the 7 speed transmission the 250 GS had.
Sound like big 2 stroke with poor rev.
With 3 into 1 exhaust pipe.
882cc for 40hp... ridiculous !
3 chambers by rotor exactly like 3 cylinder 2 stroke engine.
Sound so good.
Glad technology progressed
Displacement of inline 4, power of V6, fuel economy of pushrod v8 from 60s.
Everthing comes with a sacrifice
min 7:42 sorprendente! , El piloto es muy habilidoso para usar su pierna izquierda para el arranque , más he visto q se bajan de la moto y con la derecha lo hacen , arranque de pedal izquierdo !! hoy ya ni se ve esto!!! Exótico!!! En las Maico también!!
I never knew. I had a rotary Mazda, but never knew about these dirt bikes.
I gotta know though does it have the low end torque needed and is it going to overheat in the desert
i think they knew this would just be cool 30 years later, main reason for buildin it...
This wankel bike must have run very very hot not being watercooled and would love to know how the carb mixes the fuel into the froth req...ive owned 2 RE5s in the past and these were both big issues for Suzuki to work around....
How much hps did it put out? How much did it weigh? And why did they sell out?
Oil injectors will fail, sometime, someday. Experienced Mazda Rotary users add 1% oil directly into gasoline. You could add also 1 cc of MoS2 (LiquiMoly) per mix litre, Molybden additive was part of lubricant in Le Mans endurance race winner Mazda car. Blessings +
What a beast!
I do love a _wonkel_ motor.
It revs like a 2 stroke and it have that strong sound like a 4 stroke. but the engine looks a little heavy. Anyone knows how much did these bikes weight?
2:30 Hercules spotted in Italy...in Sardegna, cosa ci fa quella moto lì?? Che gran bel rumore che fa'!
Single rotor Wankel engine sounds like a 2T
Yes, 😊 But Is 4T and use oil drop inlet in to the chamber.
Very cool and interesting 👍
That's bad ass !!!!
Perfect
There is 1 or 2 at the seba motorcycle museum here in Oklahoma
Id love to see Travis Pastrana rip one these bikes to see how in compares to other bikes
Didn't Hercules also build a conventional style 2 stroke called a "Twingle", that was 2 pistons firing as 1.
It's called a split single
@@Team-fabulous I remember reading about it Cycle magazine. I guess there was no advantage or they would still be making it.
I want to see Travas Pastrana ride one. Nobody else,,,, just Travas Pastrana. Who else understands this?
In the videso there are Gualtiero Brissoni and Stefano PAsseri testing the bike. Both former Word Enduro Champs and Six-Days winners...
Love it I bet it outlasts piston powered 2 strokes
Nice motors
I assembled and builded that bike. E fine Is One of 12 originale 520 engines. The frame Is like the 250cc SachsGS modified. The video Is nice but with lot of imprecisions data. Anyway ok👍
How hot does that engine get.will it work with mud in the cooling fins???.i would love to try it. Clever how sachs got the cylinder vertical. Instead of the normal horizontal. Nice
The engine always works very hot.
Outcoming gas are around 1.000° C when normal engines are around 650/700° C.
When teh engine is very hot you losse some power but you have always enough to run fast.
I wish to see a Swap of a japanese framed bike (CRF?) with this jewel stuffed in.
Sounds like a 3stroke
Rotary engines just aren’t given the credit, and subsequent research, they deserved.
GM wanted to used a two rotor in a mid engine version of the corvette in the late 60’s
Only took 50 years to get ONE of those two ideas in production.
That’s so cool
Aixro XR50 kart motor mated to KTM RFS gearbox using a straight thru crankshaft with gears/chain (like Norton) and a Recluse auto clutch, now that can be done right now. This would bolt right into an excellent KTM chassis. If anyone does this, please let me know.
Nice bike but very rare.i have a 7 speed hercules.good bikes.
can ask on market is sach hercules W-2000 was the first one build in 1974-1977 1,800 was maked and it is rare
I like it
So, why was it not a commercial success?
What is the power band and longevity like?
Max power of the KC31 engine is sliglt less than 40 CV at 12.000 RPM.
Torque is almos flat at 33 Nm / 3,3 kgm.
No problem with longevity as the inner surfaces are finised in Nikasil (it was 1976, always remeber this) and off road with this engina you never go full power, is impossible.
You normally use 1/3 of the power, and is is more than enough.
I don’t understand why the dirt bike rotary theme wasn’t developed more , insanely simple design, so much power from something so small and great torque, good longevity, possibly better than two stroke, tough simple cheap to produce, l don’t get it.
Brutal e impresionante.
I would imagine the engine didn't have the low end torque to complete with the piston engines. Also, how was the mileage?
Are you kidding? Find me a 300cc two strokes with 3.3 kgm at 7.200 rpm... The main problems in the races was the rules make the 297cc Wankel running against the over 500cc engines...
@FichDich InDemArsch The Wankels has never been disqualified.
It has been penalised by the fact that international regulations double its displacement.
Today, in historic rallies in the UK, the true displacement is multiplied by 1.5.
This is much more correct.
The 502 would be competing against 450cc bikes, from 1976, of course.
But testing the bike makes many things clear.
@FichDich InDemArsch When Rotary was introduced by NSU, all, I mean ALL, car manufacturers bought the rights to make it.
For example Mercedes-Benz in 1969/70 built the C111 with the Wankel engine.
The 1970 engine was a 4 rotors, displacement of 2400 cm³ which gave 350 hp at 7000 rpm and a speed of 290 km/h.
Not bad for 1970...
Only Mazda developed it properly for everyday use starting from the 1963 Cosmo to the RX-8.
Problems? Yes, of course. As any other kind of engines has its own.
High temperatures and high fuel consumption.
Last but not least:
in 1991 the rotary Mazda 787B won Le Mans 24 hours, following all the FIA rules.
I'd give all three of my kidneys and a pair of my livers for that.
If you come to Switzerland you can test it for free.
Qual o motivo dr NÃO TER UM MOTOR DESSE HOJE? Poluição? Conversa.
Eles simplesmente sobreaqueciam e usavam muito óleo, um final infeliz que também espera os motores 2 tempos infelizmente
POWER
And they are still running today..
Use of my Video of my W2000,but no credit.
Amo esse barulho
I remember riding a really old bmw rotary bike set up for flat track. Ik the bike is still there I just don't date the girl anymore
But why? For what beneficial reason?
It’s a 4 stroke and 2 stroke hybrid
It sounds like a 4 stroke and a 2 stroke mixed together
thats trueee broo
Damn looks expensive to repair
Yes, no spare parts available.
Not many people know this,but back in the 70s,mazda was kickin everybodys ass in racing,like,just destroying them,so the big 3 got together and threatened to pull out of racing unless mazda put a lot of extra weight in their trucks and cars,well,that just made them hook up even better,so,the big 3 threw a hissy fit,until they got mazda dqed.so much for fair huh?.1970s cancel culture
Boys... we’ve found the sound of a 3 stroke
hahaaha, that's true its something in middle 2t and 4t
Now that's what U call trick!!!!!
The suzuki isnt the "water buffalo" a gt750 is.
No sé de qué se ríen si estos motores contaminan y gastan como loco
Thats a cool bike , until know i've never heard of it , Hercules is more famous for its 50 ccm mopeds
Only needs half the amount of gears then a narrow power band 2 stroke
nice to put it on a sportbike'
I want one
Wow it sounds like a two stroke and a four stroke at the same time. That’s insane but brilliant
There’s always been a lot of controversy in racing with rotary engines. If a 1000cc only fires on one cylinder at once, you don’t class it has a 250cc. But some how Wankel engines get a way with it. Cheating Germans. Only joking. The engines are only classed has a third of there full cc. They achieved fantastic power when Brian Crichton fitted the Norton rotary with the exhaust Venturi ( good name) it was time to race the TT. I was there.
So much gears noise inside engine crank like shaking coins inside tin
Работает как ведро с гвоздями )
Wonkle? lol was it made in a chocolate factory?
Yes by a squad of Oompa Loompas...
Θελω να μου το κανετε δωρο
Sounds good. But slow af
I want
Very, very expensive. Is the only one worldwide which could be sold. But if you come to Switzerland you can test it for free.
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