That's only with cars, where there's a separate tier of legislation and case law to SOGA. In any case, the OP bought essentially a kit of parts on his own insistence, willfully deprived the store of the opportunity to conduct the post assembly safety check which forms part of their build process, and topped it off by signing a document to say he did this of his own free will, was properly qualified to assemble to machine, and accepts full responsibility for any adverse consequences that arise as a result of not allowing the store to complete the assembly and satisfy themselves as to the safety of the finished product. The document is full of legalese, undoubtedly written by someone skilled in the area of contract law arse covering.
I know exactly what the disclaimer says because I've done exaCtly the same thing myself, most recently last autumn when I bought the Wife a Pendleton. The difference is I actually read it before signing, and I am Cytec qualified. The OP makes no mention of being qualified to assemble the bike, and is clearly not even competent to assemble the machine, hence almost killing themselves on their first outing.
When they willfully signed that document they either misled the store at best, or lied to them at worst about their qualifications and skills, depending on how generous you view such an action. How is it in any way the fault of the retailer of the purchaser does not tell the truth during the transaction?
