HELP!! cbr400 not weel :(

[petrolhead19]

My bike for some reason has decided it doesnt like going through gears properly,
at first i couldnt get it out of 2nd or 3rd, now it goes up through the gear but not smooth and some reason doesnt get 6th :S
but coming back down gears is a task and half it wont go unless i stamp on it then it jumps down more than 1 gear . also makes a nasty clunking sound through gears.

i need help fast, what could this be?
Gear selector drum?
Gear selector forks?
Detent spring?
Actual gear clusters?
or could it be a combination of these things?

or anything anyone can think of, i have a new clutch on the way as i need one anyway.

Thanks
Adam

[petrolhead19]

chain is a little slack but not over slack its been worse lol (got a new one coming)

ive adjusted the clutch and tried in a couple of different places but still nothing (got new clutch plates coming)

oil level is fine how it should be.

im going to go have another look now and see what i can do.

Adam

[2wheelsteve]

Does sound like low oil as previously mentioned
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