here is the text copied from the link once.
"1. Get a RUNT (Registro Único Nacional de Tránsito) - You can get yourself registered at a Tránsito (it exist in every town)
- you need a passport, driver license and you should have a columbian adress ready (maybe hostel
)
- sometimes Tránsito required an official medical-check form that indicates your blood-type. You can get this at a laboratoria Clinico
Take care they fill out the forms with your name in the right way!
2. find your bike
3. check your bike
- Is the frame and engine number the same on the papers?
- Is the one who’s selling the bike the real owner of the bike or is he/she selling on behalf of the owner? The whole process is easier and when the actual owner is there.
- Did the owner pay his taxes? Check that! This is very important, because Colombians don’t like to pay taxes. It happens that you agree upon a price of a bike, and the owner said at the very last moment that he still had to pay two years of taxes and a fine of being to late …
- Valid Seguro Obligatorio de Accidentes de Tránsito,(SOAT)? This is compulsory third party liability vehicle insurance. The insurance is attached to the bike and not to an individual. It costs around COPA 300.000 a year.
- Valid roadworthy certificate( revision Tecninca)? New bikes do not need a Revision Tecninca for the first two years.
4. Buy the Bike
- Go to a Notaria with the vendor in order to make a Contrato de Compraventa de Vehicle Automotor. This contract says who the buyer and the vendor is as well as the information of the bike (numberplate, colour, year, etc.). They will charge around COPA 10.000 for this services.
- Receive your copy of the contract and pay the agreed upon price to the vendor. It’s important to get all old copies available.
- Go to the Transito and pay for their services. You will receive your official ownership card.
- remember you'll have to go to Transito in a place, bike is registered in. For example if it's Transito Bogotá, you'll have to go to Bogotá to get your 'priopedad' card. You might avoid it, if there's a 'Certificado de tradición' from this Transito among paperwork."
Have fun