First read the relevant parts of the workshop manual, you can download it here:  https://www.the-t-bar.com/downloads/download/8-technical-manuals/20-mgf-workshop-manual  
Then have a ferret through the guides here:  https://www.the-t-bar.com/forum/54-how-tos/25321-a-to-z-of-how-to-guides-pics-and-videos  
once you’ve gone through that lot we will be happy to explain and expand on anything you’re not sure about.
The factory manual is not the best written technical document, indeed it falls a bit short, but has diagrams and all the technical figures that you need to do the job properly 

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