depends on circumstances.. 'having trouble' and 'sometimes'
could be anything.. do you mean it doesnt go easily, when riding,
when stationary, engine off, hot, cold.. does it sometimes go in ok..
it is a new bike and will generally wear in, including gears etc..
if stationary engine off and cold, try lightly tapping, the lever,,
just, tapping it, once or a few times,, that should be enough,
and if theres some misalignment stomping on it wont help..
if stationary engine running, in neutral, clutch in and out a few times
then tap it down into 1st next clutch in.. if in second, try easing, clutch
out slightly, just enough to start engaging a bit then clutch in, tap down..
if running approaching a stop and wanting 1st gear, try continuing sequence
of gears from wherever you start from [5th say] down to 2nd but continue
same sequence while rolling still, into first.. wouldnt hurt to rev throttle
[clutch in] to say, 3krpm then tap down as revs start to drop [ie, quick blip]
if stationary engine off in 1st neutral or 2nd wanting one of these from another
try pushing forward on bars until you feel the drivetrain take up the slack
and stop moving forward, then let it move back just a little bit, tap into gear
[or neutral].. also try the same thing backwards [then forwards a bit]..
anything to do with the clutch always check your oil..
engine oil bathes the clutch so check that first..
obviously,, use at least honda recommended oil
and [despite some contrary opinions] use correct
oil specifically designated for motorcycle engines
which will be part of the specs on the label..