This is a very personal choice in what you trust. I personally have never had a bad experience with Chinese stuff and I?ve bought alot over the years but I?m meticulous in researching the product as much as I can. I used to race at British Championship level plus mechanicing with HRC TT etc, so you?re always testing unproven parts and accept delaminating tyres on the back straight at the old Snetterton as part of the job. If you use you common sense and have some understanding of what materials are designed for you?ll be fine. Ie don?t Anodise parts that need to flex, do not use titanium in suspension areas, be very careful coating forged wheels that use heat as part of the process etc. I have a set of Arashi discs on my TL1000R and they?ve fine, certainly better than the EBC discs that were on there before (never again, they only honour their warranty if one of their dealers fit them).. The bike weighs a ton and it?s thrashed mercilessly. My preferred discs are Galfer. I got so fed up with buying Brembo 5.5mm race discs and the centres wearing so quickly that they would fail an MOT in 2.5k miles. Yes, They can be rebuilt but it?s a cost that shouldn?t happen so quickly. Even std Ducati Brembo discs do that. Galfer wear out in thickness before there?s play fore and aft on the centres.
So bearing in mind everything you buy is probably made in China from clothing to parts from most official Brands, I haven?t had a problem but I understand if other people wouldn?t touch the stuff with a barge pole. Bodywork wise Chinese injection beats OE by a mile. The paint makes OE bodywork look like a rattle can and vinyl job plus the plastic they use doesn?t get brittle when cold unlike fireblade fairings. My 2 pennies worth. J