Why doesn't my dirt bike want to go into 2nd gear.?

[jiggy_jog]

when I'm riding it goes into first easily when you wanna take off, and 90% of the time it is impossible to get it into 2nd, so i just let go of the clutch and it tends to go in then, or if the revs aren't to high it also tends to go in. It goes into 3rd and 4th fine.

[UDUMFUK]

you have a problem that is internal in that transmission causing that sorry