Simson Schwalbe primary drive shaft rough/ratchety.

Hello,
in my opinion its not normal, that the cog seems rough and ratchety. It should be more like smooth. Does it make any noices? How about the tooth of the cog? Maybe its worn? can u post a picture? It could also be that there is some dirt in the bearing? How long time did this engine not run? Maybe you have to change the bearings?
i hope i could give some "thought simulation"
kind regards
Finux

sorry for my bad gramma
do you have any radial or axial clearance in your bearings??
Can u feel the ratchet and maybe locate the source of this problem by feeling / hearing?

Maybe this will be usefull for you:

https://www.akf-shop.de/explos…ungen/simson-kr511-a1041/
-> there you will find some exploded views for your scooter. Once there was an option to change the language to english at this shop, but I'm not able to find it anymore

http://www.mopedfreunde-oldenb…sets/images/Explo_M53.jpg
->another drawing

Good Luck!

i dont get it exactly... you could dismount your primary pinion and check if this problem is based on primary side or not. so u'll see if the problem is located on your crankshaft or its gearbox sided?

Hi Bill,

welcome to the Schwalbennest.

Great to hear that also in the UK the Simsons are rolling.

The cog should rotate smoothly. Good idea to split the gearbox. At least if you have the knowledge and tools.

Regards

Theo

Thanks for your answer! I'm glad you found the problem. Good wishes for the future - let the bird fly again ;D