My valves are chattering when i start my bike

Valve chatter sounds pretty serious. Replacing coil pack won't help. I would check compression, if low, squirt a little oil in the plug holes, and if compression doesn't come up, bad valves.
You might need to check/set valve timing again, too.

Sounds like a Timing Belt ready to go! Fix it before you bend the valves!

Your oil level too low would cause that.

if its valve chatter you will hear it just under the valve cover pretty pronounced, but usually valve chatter gets quieter as the bike warms up, you might look into your cam chain adjuster those get loud and chatty at higher rpms.

Pull the spark plugs then go get a fresh set. The bike is probably flooding out. Clean the air filter then spray starting fluid into the filter. Be sure there is gas in the tank and the fuel valve is open.

Not sure what problem is but my 97 does the same thing it has a rattle or chatter at low throttle and deceleration. Did you ever figure out what the problem was?

hi,it sounds like your bike is just about due for a new set of clutch plates(my gsxr race bike did the same thing,put in new plates..problem gone),as far as the rattle or chatter this is normally caused by weak clutch springs or in some cases the clutch basket its self may be worn,not a big job to replace either,most clutch kits come with new fibre plates ,new steel plates and new springs,fit a new kit in the bike and i think most if not all your problems will disappear...cheers

Any chance the valve spring has collapsed? Cam shaft thrust washers missing? Cam shaft bearing gone bad?
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You need to get your valves adjusted. When an engine is new, all your parts are not worn. As time goes on, mechanical parts break down. your valves are riding on your camshaft, and eventually wear down. You need to re-shim your valves to maintain the clearance that it had when it was new. You can do it yourself, but you are better taking it to a mechanic. They have the right tools. Shouldn't cost too much. This is a common procedure. Dirt bikes have this same problem, mostly because of the high RPMs and engine break-down is more rapid.

Check the ring gear on the clutch basket to make sure the teeth are all in good condition. Check the starter clutch and armature assembly and make sure that the teeth inside aren't chewed up.