58/59? Kr50

few questions. what exhaust does this year take? any cylinder piston recommendations? not a restoration so any suggestions welcome. thank you

The KR51 fork will not fit into the frame of the KR50.

oh. guess ill have to keep hunting for a fender or figure out a different front setup. thank you

Everything you need is a original KR50 front fender and maybe a handlebar. Maybe you find a dealer which sends you the parts in the US. Write to some dealers.

Mein Englisch ist very well, aber ich würde unserem Oldtimerfreund aus den USA gerne helfen, um an die Fehlteile für den KR50 zu kommen.

Ich denke wenn die Teilesuche hier in Deutschlang einer übernimmt und dann alles gesammelt nach USA schickt ist es einfacher als wenn er verschiedenste Händler kontaktiert und die Kosten immens hoch werden.

Als erstes möchte ich ihm die KR50 Ersatzteilliste als Datei zukommen lassen, damit er eine ordentliche Bestandsaufnahme machen kann und sich auch mit den einzelnen Baugruppen befassen kann was die Restauration auch erleichtern wird.

Ich bitte dahier, dass er mich per PN kontaktiert und mir seine Emailadresse schreibt.

Kann das ihm bitte einer in einem verständlichen Englisch reiben.

Jörg (SimsonSammler1234) would like to help you with searching for parts in Germany. But first he would send you a KR50 spare part list, he only needs your Email adress for that. Please tell him your Email adress about our forums "PN" (private message). You only got to klick on the "PM" button under Jörgs message.

Da hat einer 'nen Kotflügel für den Kracher im Angebot ...

thanks to this forum. the only parts that I need that I cant find in a shop are the front mudguard , the old style airfilter and the old oval speedometer. thank you all. cant wait to dig into the rebuild .

Unfortunately they dont ship to the states or that would be perfect.thank you

Do you know these guys?
They also still have some original KR50 spare parts, such as the original handlebar with levers or a new piston with rings and exhaust they also have.

I dont know that Sausewind ships to the US. Try it out. A new piston alone will not help good, he needs to grind the cylinder too.

And of course a bent fin on the head snapped off. Just have to use it till i find another. Ill be replacing the cylinder and piston if i can find some who ship here. Ill save the other cylinder for a back up. Thanks for all the links.ill see what i can do. Was way easier to get puch parts.

Sr2 is the same engine with pedals? Do the cylinders and heads work for a kr50? Pretty sure they do but dont want to waste money.

Is it the same puller for the kr50 as the kr51? Hard to find the measurements.

Hi,

well basically its the same engine so cylinder and cylinder head would fit. However the KR50 had a larger intake port. There are also four cylinder head versions which will give you a different CR!

Early KR50 (like yours) had an estimated 2,1 hp with a CR of 7,5:1, later ones had 2,3 hp with even larger intake port and CR 8,5:1.
SR1 and SR2 had 1,5 hp and CR 6:1 or CR 7:1, later Sr2E's had 1,8 hp with a CR of 7,5:1.

Lots of info on that topic in here: https://www.ddrmoped.de/forum/index.php?showtopic=2213

You could of course use a Sr2 cylinder and modify the intake port...