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i sent a PM to kkim like a week or two ago asking the same question, i was being too lazy to start a thread and maybe not wanting to risk to sound like a noob, he he...
in the end we came to the conclusion that its just normal for the bike to make a clunk noise, just as long as its not a metal to metal grinding noise, lol.
anyhow ive noticed that if i pull hard past like 9~10k rpm in the 1st or second gear, whatever gear i go into next is often quite loud! i think it might have something to do with the speed at which the wheel is turning, compared to the engine, at the time you engage the clutch (since its usually general habit to release the throttle a little when you change gear, and on the 250 ive noticed that the engine drops in rpm very fast), so by the time you engage the clutch, release some throttle, and up/down shift, there is a big difference between the wheel, and engine speed, not sure why this would cause the "CLUNK" but it seems to do so~
if i try to keep the RPM even throughout the gear change, i find that i get a smoother transition, throughout all the gears, but no matter what i do, i always get the occasional "CLUNK" and yea, normally in the first three or four gears.
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