Hi Guys,
Not sure if anyone has had this issue b4 and if it has, sorry for re asking. My NC 30 is giving me a headache in 2nd lately

If I take off from standstill with haste, she gets to 2nd and wont shift up. gearlever is rock solid. to get out of this, I have to clucth in, down shift and then up shift to pass 2nd. I sometimes have to do this a couple of times to get to beyond 2nd (can be very embarassing)

. Then there are times when this doesnt happen at all

. If I take off from standstill moderately, she seems fine. this however can be annoying especially when you wanna drop it like it's hot.
Advise welcome.
When I last had the engine open, everything looked fine in the box, no rounded or damaged dogs, gears looked pretty good too. I don't use the bike too often (take it out now and again to play with).