I've got a 98 cb250 and the gear changes are pretty shocking. when i bought it it wasnt easy to put the bike in neutral. took it to the mechanic suspecting the problem to be somewhere in the clutch and he replaced the clutch. it only made a slight difference but a difference all the same. now recently, after the bike gets warm, its near impossible to shift the bugger into second. most of the other shifts are ok, albeit a bit clunky. the oils been changed and there doesnt seem to be a leak. i beleive the chain may need changing or adjusting but i have no idea how to do either of these. another thing thats crossed my mind is that the gearbox itself is buggered? its got about 30000 Ks on the clock and had two learners on it before me. maybe the gearbox is just screwed? does anyone have any ideas as to what the problem is and if it is the gearbox, how much is it going to cost me?