[long response, basically effects of tension etc
plus few hints on hand etc use in riding..
just scroll on bye
]
has this excessive vibration just started, or been there
since 2011 and during that 5000k ?
best check would be to ride other cbr250r's..
without doubt tho, the experience of vibration
will and must be effected by how you hold
or grip the bars.. if your muscles are tensed
then all sensors in muscle fibers/bundles, joints
and connective tissues will be sending more
info into your brain, ie, you will be more
aware of it because there is more of it
being generated by activated sensors..
gripping for any length of time will
cause recruitment of other muscles
in response to the gripping action
incl as lactic acid builds up due to
ongoing muscle activity..
ie, not only muscles of forearm
which move fingers will be active
but radiating muscle activity thru
shoulders, shoulder blades and into
chest and anciliary muscles of breathing,
will all be effected thru sustained gripping..
bottom line of this natural predictable sequence
of muscle tensioning includes influencing
breathing [or ease of it] and to some extent
potential for nice easy rhythmic heartbeat..
the more aware brain is of something
[thru sensors etc] the more it is felt..
one solution for predictable effects of holding
something for extended periods, esp gripping,
is to change position of fingers, palms, wrists,
arms, shoulders, neck etc, thus the muscles
operating their joints in movement..
this effectively rests the tense muscles..
softly moving fingers and shaking wrists [for eg]
can release tension buildup around those joints
and their muscles.. even just stretching fingers
outward still resting palms on bars will help..
sometimes i just lift both arms up
in a V shape for a yawn type stretch..
whatever you are doing tho, given normal
vibration etc, it is always much better
to not, grip the bars, as members note..
there is no need to grip the bars
in general road riding..
even hand braking can be reduced
by practicing engine braking..
smooth clutch control needs only
momentary short finger movement..
if youre not actually doing anything
you are at liberty to relax your hands
and just rest them on the grips..
throttle will still be under control..
in traffic awareness of relative position
and stopping distances etc can reduce
brake and clutch lever use..
ie, rest muscles doing that action..
by all means try out gel grips etc,
but aside from some external factor
causing excessive vibrations,
it does come down to managment
of joints and muscles in the task..
or 'how you ride the motorcycle'..
relaxed, not tense, is easiest
and most enjoyable..