02 ec 250 jetting help

[crem55]

I just picked up a slightly used 02 ec 250 the only thig done was a messco pipe put on . My question is when you give it it gas it slugish when you first give it gas but every where else it seems fine once you get going. I ride in new england racing enduros and I'm looking for jetting recomendations . The bike was bought from a older gentleman that never rode it and sold it to a college kid that never rode it so its been sitting I change the fuel and I'm going to check the carb but I would like to have suggestion on the jetting before I rip it apart.Thanks , Shane