300 ec not running correct

[Lukeeccles]

I have a 2002 gas gas ec 300 its got good compression. It is very boggy in 1st and 2nd gear and the power band is hesatant to kick in. In 3rd 4th 5th an 6th its seems to be fine also if im off road it seems to run alot better than when im putting along on the road. Power band works alot better.
Any info on how to reslove this problem would be apricated

 

[(F5)]

Yes, head to the carb section and read up jetting suggestions. You will not believe the difference a needle will make. Until you do.