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Where is the % authenticity limit for using original part and replica part for restoration? If I build sandcast only from replica parts, do you think it will be still Sandcast?
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If a new Sandcast arrived at the Honda Dealer with a dented tank and was replaced with another Sandcast tank prior to first sale, is it no longer a Sandcast?
If the Frame VIN and Engine VIN are original and they fall within the Sandcast VIN range, it IS a Sandcast. Maybe not original but still a Sandcast.
For that matter, I think even if the cases are replacement Sandcast no number cases, it is still a Sandcast. Maybe not original but still a Sandcast.
The question becomes, "How original or how authentic is a 'restored' bike?" Points for originality if you will wins the Beauty Pagent.
Sellers of Sandcasts should disclose as much as they know IMO. My $.02