I bought it only for the fuel valve and air filter. Seems to be good quality, no leaks yet. Would definitely buy for the price unless you want super expensive parts for your quad. The spark plug is a cheap Chinese brand that I will probably use as a spare in an emergency... The only issue I would have is the 1 part I will not use, the oil filter. All spare parts stores have a wire mesh filter and a paper filter is included. I wouldn't trust it to flow enough/properly, so that's the only part I throw away (but given the overall cost of the kit, that's still a lot).
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