ive scanned the posts but cant find a diagram. basically my seat lock has broke and i cant get the seat off. Ive only just bought the bike.. the key is not actually turning the mechanism its possibly sheared off how does it actuate i can pull the seat up and inch or two and can see a lever which I have poked about but it doesnt release anything.

which way should I push this lever towards the front of the bike or try and flick it to the back..any ideas thanks

 

I don't have the diagram in my mind since I also just bought my cbr, but I can try to take some pictures tonight, if no one else has some.

 

Here's a picture of the seat mechanism




You can just see behind the cam lobe that I arrowed, a small lever which is the part of the lock release mechanism. The lobe normally pushes this backwards, you can slot a long thin screwdriver under the seat and push this backwards to release the seat. I had to do this myself once so I know it works. It's just a bit fiddly, unless you get lucky it'll take about half an hour, so get comfortable before you start

 

You can drill a small 1/4 inch hole up under the rear wheel "fender/ mudguard"
dead center where the oval part meets the straight part ......then poke a flat head
screw driver up catch the latch and push rear ward ..... keep a heavy weight or
pressure on it seat as you do it ..... just put a little rubber bung in in case you ever
need to have to do it again ! .... nice easy fix that can't be seen it's that simple

Looking at Hawks pic your access hole show right under the front of the
latch (allowing for camera angle ) and the flat screw driver will engage the "cam"
(not the loop) at the rear ..........push it back with the flat head .......POP off she comes

 

thanks alot hawkwind ive got a better idea what to fiddle with now..my key turns anti clockwise so i assume it will turn the bent wire thing and release a latch hopefully ... ill check it out tomorrow....

 

^^^^^
The arrow is pointing to the thing you need to push, hiding behind the bent wire thing (as you so eloquently put it ).

If you can get the seat up an inch or two as you said, a loooonnng thin screwdriver should do the trick

 

When i took my grab rail off to paint i put the seat back on without the grab rail & LOCK i lifted the seat a bit as Hawk says & used a screwdriver to push the latch Backwards only took a couple of minutes (beginers luck).
When i refitted the grab rail i put the latch arm thingy back in the lock but facing the wrong way so i had to use the screwdriver again.

Good luck with getting your seat off, it should'nt be too bad.

 

I had a couple of issues with this. I found once I didnt turn the key hard enough ie it had a few mills to go to actuate the mechanism. Sometimes that slider that is being pushed back doesnt run smoothly in its rail. Pulled it all out, cleaned and re-greased and added some insulation tape on the bottom of the U section on rod that actually pushes the slider back. The insulation tape is to get more contact to actuate.

 

sorted it thanks to hawkwinds pic only took a minute..problem is whoever fitted the rack put the latch arm thingy on wrong similar to dadarob I recon

 

^^^^^
Glad I could help out mate