The NSU Supermax (built 1958) was my first motorcycle in 1968. Unfortunately the engine died of a connecting rod bearing failure, so I had to disassemble it to install a crankshaft from another engine. There are different crankcase ventilation systems depending on the year of manufacture, you have to keep that in mind when you assemble parts from different engines. The older crankshafts still had mud sleeves in the crank webs. Defective connecting rod bearings were a common failure, but it is said that there were roller bearings with a reinforced bearing cage. I found many design elements later on the HONDA CB72. The Japanese had copied many things from Germany at that time, in order to develop them further.
There is also some old Yamaha motorcycle ,that has identical front fork, and some other parts as NSU Max. I have seen 3 different crankshaft model . Somewhere I have video with all three crankshaft ,but nead to find it.
I worked on one of these my brother owned when I was 13 years of age. Had cylinder head off it. I am now 72 and it is just as I remembered it. It has to be said, as someone who owned a series of NSU Prinz cars: This company had an awkwardising (peinlich in Deutsch) department. Once they had a brillinat design like the 250 Max developed, they sent to to the awkwardising department, who spent many months making everything difficult to work on. This department also worked on their cars, and when VW bought them out for the K70, the deparment was sold to Citroen, who doubled the staff in it and set it to work on the GS.
To my opinion it was one of the most interesting company that build vehicles. Lots of inventions ,and lots of models ,especially lots of motorcycle models.Very interesting history this company had.
If NSU had not been acquired by VW, they could have driven it far today for the German motorcycle industry. NSU Max 250 with overhead camshaft and pressed sheet metal frame with monologue central spring was a model for Japanese motorcycle manufacturing. MR Honda was in Germany and learned how to do it The first Honda motorcycles are faithful copies of the NSU Max but the patented camshaft drive was not copied from these beautiful NSU motorcycles from before. From 1949 to today (71 years), Honda has manufactured over 400 million motorcycles
@@beaufortstudio NSU Prinz war auch Zweizylinder mit gleicher Ventilsteuerung wie die Max. Der Motorradmarkt war damals in Deutschland am Ende, aber die Max mit diesem Zweizylindermotor hätte die Krise überstehen können, genau wie BMW einst mit ihren großen Zweizylindern.
No one chose hair springs as there was no room so I particularly like the head studs that dont get in the way of the hair springs, that's before we get into the double eccentric OHV, those clearance adjusters. Lets face it this is properly engineering machine, we miss you NSU, engineering perfection.
The Super Max was the primo 250 going in my area of the Midwest when I first got into motorcycling in '57. Great quality and durability but they were getting dated soon after. Looking at those valve clearance adjusters, how heavy they were compared to those of a Honda engine which would be a limiting factor for performance improvement. I recall the S20, the "scrambler" version of the Super Max, handsome, bright orange color with upswept exhaust and 19 horsepower as I recall. I suspect they were heavy handling but did have external dampers on the forks.
Had one with chain lubrication that was good and bad . Forgot to check the oil level. But if ever possible I might buy a old one just to get back good old memories The vid just needed some editing . Like what fluid you used, quality of the new bolts 12-10 stainless steel 304L or so ,Thickness of gasket (type /material) and so on for i don't suspect new ones can be bought . Thanks for the show loved it
Luckily ,I was able to buy complete engine very cheap .At this moment I'm rebuilding that engine . The reason why I bought engine is because I'm making new video of how to rebuild engine. In this video I will explain all small details . With help of one friend we ,will restore this engine in factory condition . Engines that I rebuild earlier are not 100% factory rebuild , because I didn't have tool , knowledge and experience . I'm waiting for some new parts ,and some defective parts need machining ( camshaft drive system bushings , crankshaft oil bushing ... ) I will try to give as much information as I can ,on every step of restoration .
I saw a box with the brand Wurth on the bench they have all the essentials and if commercials is to be be made lay the parts on a envelope or bill from where you purchased it from or address where they still have a 250 cc motor from 52 😂
Some years after this Mr.Soichiro Honda created the C 72/ CB 72.These bikes had OHC engines as well but chain driven.Same effect but much easier to produce. NSU went the wrong way.
I wouldn't say NSU went wrong way ,they went harder way . To some available information Nsu Max was for several years on top as racing motorcycle for 250 cc races . It was time of innovation and experiments , and that led to Mr.Soichiro Honda ,he just made it better . Same thing as Mazda and Wankel engine .
Aus vereinfachter technischer Sicht lag Honda später richtig. Habe einmal einen cb 400 four quasi mit dem Bordwerkzeug wieder in Stand gesetzt. Vier Zylinder in den 50ern für den Normalfahrer nur ein Traum. Honda hat dies später ( immer noch klassischer Motorradbau) später möglich gemacht . Dennoch, der Maxmotor ist eine der interessantesten Konstruktionen bis heute und war bei Pflege und Aufmerksamkeit absolut zuverlässig. Die Konstrukteure damals waren ihrer Zeit weit voraus mit hohem Niveau
@@jensnitsche4994 NSU hat versucht, etwas Neues aufzubauen, und es ist ihnen gelungen. Vielleicht war es nicht die beste Idee, aber sie haben es geschafft und es funktioniert immer noch sehr gut :)
Fantastische Arbeit.Mein Vater fuhr eine Max.Leider hat er mich nicht in technische Details eingeweiht.Diese Ventilsteuerung ist wunderbar.Welcher Motor hat sie noch?Dir bei der Arbeit zuzusehen ist Mediation.Danke.
The mostt annoying thing is to tighten the cylinder head screws, especially the rear left one. You did not measure the angle of the camsahft housing, which has to be level or 0.05 mm lower on the spark plug side. This is important to reduce wear on the bearings of the two pushrods. And you did not use a headgasket with aluminum ring, which has a much longer lifespan according to the non reinforced one, you used.
This was my first Max engine that I repaired, I made a few mistakes, including the one on the cylinder head (not aligning the angle on the camshaft bridge). Later I made video with restoration of another engine , where I was much smarter and more experienced .
@@oldtimer-Z get yourself the NSU workshop manual or the book NSU Max - richtig angefasst from Ernst Leverkus. It helped me a lot, when I was restoring my first Max engine at the age of 15.
It is very complicated engine for its time ,producing it was probably expensive . I can't remember precise, I read somewhere that it was one of expensive 250cc motorcycle . Because the frame was all so complicated compared to DKW , BMW and similar german motorcycle
I'm not that lucky :) I sold the motorcycle few days after the engine started . I needed the money to build garage ,so that I have place for my work . Most of my work was done in hallway of my house ,it is time to have my own place for work , without bothering my wife :) . Some of money is invested in tool ,and part of money for new project Victoria KR25 HM .
There are 4 special bolt that have threads on both side (both threads are from outside ) . One side of the bolt is screwed into the engine head ,and other side is connected to special nuts that are screwed in engine housing ( that nut is part of a special bolt that is screwed into the engine housing ) . It is difficult to explain . In total there are 8 special bolt and 4 special nut that connect engine housing with head . And all that goes through holes that are drilled through cylinder cooling ribs . By screwing the nuts you are pulling engine head to engine housing and pressing cylinder that is between .
@@durdu938 NSU Max için kesici kontağı ? www.ebay.de/itm/392933654216?hash=item5b7cabbec8:g:EfwAAOSwBIxi5Yt3&amdata=enc%3AAQAHAAAA4DhqibrDSGdbZuFto2fxhJ7btdIJkROCZbAwppG8ZHwEbbMdEsHq3a%2FCEGiO215QJSf0lmbxBXCT6pbuSa5Z7lgeV1ZD%2BVHcnWqU4OrVRPyEciDcUsUZaZgOMGVArcVwnbVUF9s1EopNot3ixkvw5Gl%2BWzcHwLeVg24P63vr8%2FhHLXoM1c0HKOHPwHXGeqRy1jrD%2FCCgr7La4DZ44kiaPAhM7SC9zc11PhkbFnk0QBERKZu%2BV%2FCCRf58g3XkJaXqSrG6HiU9LzBOVQ%2FHmq5pNbowyEuquk3EZUwD19ltWdpU%7Ctkp%3ABk9SR8zx8sfZYA
I have it somewhere on my PC ,but can't find it . You have manual for free on internet ,see link below . www.nsusupermax.com/wp-content/uploads/2017/04/NSU_Repair_Manual.pdf
Ide vam 2 litre ulja kad su mašina i posuda ulja prazne . Ja naljevam 20w-50 posto su danas toplija vremena i imaš puno vise zaustavljanja nego nekad ,i zbog toga stavljam najgušće koje mogu .
@@oldtimer-Z Ja sam sipao 1,8litra i nije mi jasno zasto opet izbaca ulje na onu rupu do rama motora? Ako mi bude potrebna pomoc oko potvrde neke za registraciju posto nisu upisani kw da li bi moglo kod vas da se to uzme od proizvodjaca? Unapred hvala😊
@@milanjovkovic1890 2 litre ide dok su motor i posuda skroz suhe . Ako nadoljevate ulje onda treba prvo upaliti motor da radi par minuta da ulje procirkulira kroz cijelu mašinu. Nakon toga ugasiti motor i provjeriti razinu ulja na šipki od čepa za ulje. Ako je razina ulja dobra ili ste nadolijali potrebnui količinu ulja ,a mašina i dalje baca ulje ,najvjerovatnije je semering ili karika istrošena ( ovisno o tipu mašine ,neke imaju semering a neke karike na radilici ) . U većini slučajeva je problem da se nadolije previse ulja ,nakon što motor odstoji duze vrijeme , ulje iz posude prirodnim padom se spusti u karter .To zna zbunit ljude pa misle da fali ulje i onda nadoliju litru ulja i onda mašina duže vrijeme stalno baca ulje dok ne izbaci višak. Podatke možeš pogledat na internetu Nsu Supermax - 18 HP (13 kw) , Nsu Max 15 HP ( 11 kw ) .
Pozdrav proverio sam skoro sve za registraciju i imam problem posto je motor mnogo star a nema ga u njihovim arhivama da li je moguce kod vas naci "coc" dokument. Hvala puno unapred
If somebody ist interested, I got for NSU LUX and Super Lux several restored frames , 11 engines in different conditions, wheels tanks, lots of smal parts, seats, Overhauled MAX crankshaft, MAx cylinder head et.c etc. for sale , all parts , can send some pics , also a Heinkel scooter dissasembled with overhauled engine . All this is located in th north western part of Germany not far from the Dutch border . Will negotiate .
The NSU Supermax (built 1958) was my first motorcycle in 1968. Unfortunately the engine died of a connecting rod bearing failure, so I had to disassemble it to install a crankshaft from another engine.
There are different crankcase ventilation systems depending on the year of manufacture, you have to keep that in mind when you assemble parts from different engines. The older crankshafts still had mud sleeves in the crank webs.
Defective connecting rod bearings were a common failure, but it is said that there were roller bearings with a reinforced bearing cage.
I found many design elements later on the HONDA CB72. The Japanese had copied many things from Germany at that time, in order to develop them further.
There is also some old Yamaha motorcycle ,that has identical front fork, and some other parts as NSU Max. I have seen 3 different crankshaft model . Somewhere I have video with all three crankshaft ,but nead to find it.
I worked on one of these my brother owned when I was 13 years of age. Had cylinder head off it. I am now 72 and it is just as I remembered it.
It has to be said, as someone who owned a series of NSU Prinz cars:
This company had an awkwardising (peinlich in Deutsch) department.
Once they had a brillinat design like the 250 Max developed, they sent to to the awkwardising department, who spent many months making everything difficult to work on.
This department also worked on their cars, and when VW bought them out for the K70, the deparment was sold to Citroen, who doubled the staff in it and set it to work on the GS.
To my opinion it was one of the most interesting company that build vehicles.
Lots of inventions ,and lots of models ,especially lots of motorcycle models.Very interesting history this company had.
Beautiful bikes n engines
If NSU had not been acquired by VW, they could have driven it far today for the German motorcycle industry.
NSU Max 250 with overhead camshaft and pressed sheet metal frame with monologue central spring was a model for Japanese motorcycle manufacturing.
MR Honda was in Germany and learned how to do it
The first Honda motorcycles are faithful copies of the NSU Max
but the patented camshaft drive was not copied
from these beautiful NSU motorcycles from before.
From 1949 to today (71 years), Honda has manufactured over 400 million motorcycles
But the Honda Dream is a twin cylinder.
What I don't understand: in the end he let the engine run, but without oiltank and thus oil pressure.
@@beaufortstudio NSU Prinz war auch Zweizylinder mit gleicher Ventilsteuerung wie die Max. Der Motorradmarkt war damals in Deutschland am Ende, aber die Max mit diesem Zweizylindermotor hätte die Krise überstehen können, genau wie BMW einst mit ihren großen Zweizylindern.
@@beaufortstudio kurze Zeit im Test bewirkt keinen Schaden
No one chose hair springs as there was no room so I particularly like the head studs that dont get in the way of the hair springs, that's before we get into the double eccentric OHV, those clearance adjusters. Lets face it this is properly engineering machine, we miss you NSU, engineering perfection.
The Super Max was the primo 250 going in my area of the Midwest when I first got into motorcycling in '57. Great quality and durability but they were getting dated soon after. Looking at those valve clearance adjusters, how heavy they were compared to those of a Honda engine which would be a limiting factor for performance improvement. I recall the S20, the "scrambler" version of the Super Max, handsome, bright orange color with upswept exhaust and 19 horsepower as I recall. I suspect they were heavy handling but did have external dampers on the forks.
@@whalesong999 es war einfach, die Max damals auf 22 PS zu steigern !
@@jensnitsche4994 Thanks. Excellent power for the time. I wanted a S20.
Cool ! Mine is waiting for repair ...: D
Had one with chain lubrication that was good and bad . Forgot to check the oil level. But if ever possible I might buy a old one just to get back good old memories The vid just needed some editing . Like what fluid you used, quality of the new bolts 12-10 stainless steel 304L or so ,Thickness of gasket (type /material) and so on for i don't suspect new ones can be bought . Thanks for the show loved it
Luckily ,I was able to buy complete engine very cheap .At this moment I'm rebuilding that engine . The reason why I bought engine is because I'm making new video of how to rebuild engine. In this video I will explain all small details . With help of one friend we ,will restore this engine in factory condition .
Engines that I rebuild earlier are not 100% factory rebuild , because I didn't have tool , knowledge and experience . I'm waiting for some new parts ,and some defective parts need machining ( camshaft drive system bushings , crankshaft oil bushing ... ) I will try to give as much information as I can ,on every step of restoration .
@@oldtimer-Z Don't forget Nm torque and simple steel in Al will oxidize (later on difficult to disassemble) Good luck
I saw a box with the brand Wurth on the bench they have all the essentials and if commercials is to be be made lay the parts on a envelope or bill from where you purchased it from or address where they still have a 250 cc motor from 52 😂
This is interesting. i own a 1954 Caproni with a 250 Max engine,
That's great ,first time hearing about Caproni .
Some years after this Mr.Soichiro Honda created the C 72/ CB 72.These bikes had OHC engines as well but chain driven.Same effect but much easier to produce. NSU went the wrong way.
I wouldn't say NSU went wrong way ,they went harder way . To some available information Nsu Max was for several years on top as racing motorcycle for 250 cc races . It was time of innovation and experiments , and that led to Mr.Soichiro Honda ,he just made it better . Same thing as Mazda and Wankel engine .
@@oldtimer-Z Yes,NSU won some races but a little bit later HONDA won most of them--with chain driven camshafts.
Aus vereinfachter technischer Sicht lag Honda später richtig. Habe einmal einen cb 400 four quasi mit dem Bordwerkzeug wieder in Stand gesetzt. Vier Zylinder in den 50ern für den Normalfahrer nur ein Traum. Honda hat dies später ( immer noch klassischer Motorradbau) später möglich gemacht . Dennoch, der Maxmotor ist eine der interessantesten Konstruktionen bis heute und war bei Pflege und Aufmerksamkeit absolut zuverlässig. Die Konstrukteure damals waren ihrer Zeit weit voraus mit hohem Niveau
@@jensnitsche4994 NSU hat versucht, etwas Neues aufzubauen, und es ist ihnen gelungen. Vielleicht war es nicht die beste Idee, aber sie haben es geschafft und es funktioniert immer noch sehr gut :)
GOOD JOB
thanks
Fantastische Arbeit.Mein Vater fuhr eine Max.Leider hat er mich nicht in technische Details eingeweiht.Diese Ventilsteuerung ist wunderbar.Welcher Motor hat sie noch?Dir bei der Arbeit zuzusehen ist Mediation.Danke.
Ich freue mich, dass Sie sich gerne meine Videos anschauen.
The mostt annoying thing is to tighten the cylinder head screws, especially the rear left one.
You did not measure the angle of the camsahft housing, which has to be level or 0.05 mm lower on the spark plug side. This is important to reduce wear on the bearings of the two pushrods. And you did not use a headgasket with aluminum ring, which has a much longer lifespan according to the non reinforced one, you used.
This was my first Max engine that I repaired, I made a few mistakes, including the one on the cylinder head (not aligning the angle on the camshaft bridge). Later I made video with restoration of another engine , where I was much smarter and more experienced .
@@oldtimer-Z get yourself the NSU workshop manual or the book NSU Max - richtig angefasst from Ernst Leverkus. It helped me a lot, when I was restoring my first Max engine at the age of 15.
Must have been very expensive to Manufacture ???
It is very complicated engine for its time ,producing it was probably expensive . I can't remember precise, I read somewhere that it was one of expensive 250cc motorcycle . Because the frame was all so complicated compared to DKW , BMW and similar german motorcycle
My father had one when I was 15, first Bike I got to about 80 mph, downhill, flat on the tank 😑
@@andyb.1026 Good old times :)
First class restoration and rebuild. What next will you ride this for a while ?. I like this machine very much indeed.
I'm not that lucky :) I sold the motorcycle few days after the engine started . I needed the money to build garage ,so that I have place for my work . Most of my work was done in hallway of my house ,it is time to have my own place for work , without bothering my wife :) . Some of money is invested in tool ,and part of money for new project Victoria KR25 HM .
I dont get it how the topbolts kan stick through cylinder and then? Are they expanded boltheads or how are they tightened ?......
There are 4 special bolt that have threads on both side (both threads are from outside ) . One side of the bolt is screwed into the engine head ,and other side is connected to special nuts that are screwed in engine housing ( that nut is part of a special bolt that is screwed into the engine housing ) . It is difficult to explain . In total there are 8 special bolt and 4 special nut that connect engine housing with head . And all that goes through holes that are drilled through cylinder cooling ribs . By screwing the nuts you are pulling engine head to engine housing and pressing cylinder that is between .
Where's the tomos colibri?
Ich schreibe aus der Türkei. Ich brauche NSU-Platin. Können Sie mir helfen?
hello I didn't understand your question ,you need contact breaker ( Zündunterbrecher ) for Max ignition ?
Platin
@@durdu938 NSU Max için kesici kontağı ? www.ebay.de/itm/392933654216?hash=item5b7cabbec8:g:EfwAAOSwBIxi5Yt3&amdata=enc%3AAQAHAAAA4DhqibrDSGdbZuFto2fxhJ7btdIJkROCZbAwppG8ZHwEbbMdEsHq3a%2FCEGiO215QJSf0lmbxBXCT6pbuSa5Z7lgeV1ZD%2BVHcnWqU4OrVRPyEciDcUsUZaZgOMGVArcVwnbVUF9s1EopNot3ixkvw5Gl%2BWzcHwLeVg24P63vr8%2FhHLXoM1c0HKOHPwHXGeqRy1jrD%2FCCgr7La4DZ44kiaPAhM7SC9zc11PhkbFnk0QBERKZu%2BV%2FCCRf58g3XkJaXqSrG6HiU9LzBOVQ%2FHmq5pNbowyEuquk3EZUwD19ltWdpU%7Ctkp%3ABk9SR8zx8sfZYA
Looks like the capacitor is leaking it's just you replace it 🙄
Lo limpias con gasolina
Yes ,I use cleaning gasoline to clean power generator .
do you have a service book for NSU Max in pdf?
I have it somewhere on my PC ,but can't find it .
You have manual for free on internet ,see link below .
www.nsusupermax.com/wp-content/uploads/2017/04/NSU_Repair_Manual.pdf
thank you very much will definitely be useful
Pozdrav. Moze te li mi reci koliko ulja staje u motor? Unapred hvalaa🙂Nsu max 250
Ide vam 2 litre ulja kad su mašina i posuda ulja prazne . Ja naljevam 20w-50 posto su danas toplija vremena i imaš puno vise zaustavljanja nego nekad ,i zbog toga stavljam najgušće koje mogu .
@@oldtimer-Z Ja sam sipao 1,8litra i nije mi jasno zasto opet izbaca ulje na onu rupu do rama motora? Ako mi bude potrebna pomoc oko potvrde neke za registraciju posto nisu upisani kw da li bi moglo kod vas da se to uzme od proizvodjaca? Unapred hvala😊
@@milanjovkovic1890 2 litre ide dok su motor i posuda skroz suhe . Ako nadoljevate ulje onda treba prvo upaliti motor da radi par minuta da ulje procirkulira kroz cijelu mašinu. Nakon toga ugasiti motor i provjeriti razinu ulja na šipki od čepa za ulje. Ako je razina ulja dobra ili ste nadolijali potrebnui količinu ulja ,a mašina i dalje baca ulje ,najvjerovatnije je semering ili karika istrošena ( ovisno o tipu mašine ,neke imaju semering a neke karike na radilici ) . U većini slučajeva je problem da se nadolije previse ulja ,nakon što motor odstoji duze vrijeme , ulje iz posude prirodnim padom se spusti u karter .To zna zbunit ljude pa misle da fali ulje i onda nadoliju litru ulja i onda mašina duže vrijeme stalno baca ulje dok ne izbaci višak. Podatke možeš pogledat na internetu Nsu Supermax - 18 HP (13 kw) , Nsu Max 15 HP ( 11 kw ) .
@@oldtimer-Z Hvala najlepse na savetima divni ste...sve pohvale😃😃😊😊
Pozdrav proverio sam skoro sve za registraciju i imam problem posto je motor mnogo star a nema ga u njihovim arhivama da li je moguce kod vas naci "coc" dokument. Hvala puno unapred
Was für ein gepfusche!! Der arme Motor ://
If somebody ist interested, I got for NSU LUX and Super Lux several restored frames , 11 engines in different conditions, wheels tanks, lots of smal parts, seats, Overhauled MAX crankshaft, MAx cylinder head et.c etc. for sale , all parts , can send some pics , also a Heinkel scooter dissasembled with overhauled engine . All this is located in th north western part of Germany not far from the Dutch border . Will negotiate .
Thanks for info .