[59096]

I purchased a set of carbs through eBay supposedly from a 2007 GPX250. I notice, that unlike the carbs that came with my bike that both slides do not go all the way up to the top of the carb bore but stop approx 5/16” down. I have attached a picture. What is going on here? I am wondering if the carbs are fitted with the wrong slides? Or was this the way it was in some year models?