Cycling Africa to Europe

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I'm planning an international cycle trip in the future. Does anyone have any handy tips and advice to prepare for this? I'm planning to cycle from Johannesburg to Europe. What is the best time to cycle in Europe, weather related? And the visas ? Your assistance would be appreciated.
Thank you

 

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Thank you !!

 

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Are you insane?

I am insane now working 24/7 . Look like I was born to work.