Is front sprocket on zzr 600 a left hand thread?

Look at the normal rotation of the sprocket. If it is the drive sprocket and it turns clockwise then it left hand threaded; counter clockwise right hand threaded.

I assume you're talking about the front belt drive sprocket. First, disconnect the negative side of the battery. If you haven't already done so, you must drain the primary and remove the outer primary cover. Then you must take the engine compensator nut off and the nut that holds the primary chain adjuster. Remove the circlip and pull the clutch adjuster plate out of the center of the clutch. The mainshaft nut in the hole in the center of the clutch. The nut has LEFT-HANDED THREADS on it. Remove the engine compensator sprocket, primary chain, and clutch assembly all together. Then remove the small bolt that holds the jackshaft in and remove it and the coupling. Remove the starter. Then, take the bolts out and remove the inner primary cover. Now, you can see the front belt drive sprocket. You must take the large nut off the sprocket. It too has LEFT-HANDED THREADS. You need a special deep socket and a sprocket locking tool to get the sprocket off and retorque the nut when you put it back on. This is a major job requiring a fair amount of disassembly of the bike. If you're going to change the belt, the rear wheel and swingarm must come out as well. I would high recommend that you purchase a service manual to help with this project.

Good Luck
Steve

IS THIS THE HEX TYPE BOLT ON THE FRONT SPINDLE, THE L,HAND SIDE IS 17MM AND THE R, HAND SIDE IS 22MM

No they are not left hand thead,normal r/h thread.
make sure chain is still on bike and front sproket and then try good rattle gun. if this does not work,put bike in gear and hold on rear brake and use long breaker bar, if still no good will need to heat front sproket nut with oxy set very carefully and rattle off with rattle gun while nut is hot

good possibility you need to replace cam chain tensioner. also inspect your chain and sprockets, they might be worn out.

Usually you want about 1 -1.6 inches (35-40 mm) from the bottom of the chain to the bottom of the chain when you grab the bottom chain about halfway between the rear sprocket and the front sprocket and move up and down.You should also left the rear wheel off the ground and rotate the chain around both sprockets checking the slack at all points of the chain. If while rotating wheel the chain gets tighter or looser this is a sign that your chain has stretched in one short section and should be replaced. If left on the bike it will either wear out the sprockets a lot faster than normal rate or the chain could break possibly damaging the engine case (very expensive).

Hi no its not a left-hand thread
If a tab washer is present bend the tabs back 1st
Use extra leverage whilst shocking it with a hammer
Good Luck

Ride safe
Bike-Doc
Please mark this as very helpful (if it has been!!)

where is leaking oil from....behind the front sprocket??

if so your chain is TOO tight

if this is your problem, replace the output shaft seal and check drive line for abnormal wear before readjusting chain tension.

Look at the starting thread on the shaft

sounds unusual,i havent come across a gsx600f yet,but i do know that some models of earlier bikes,(not necessarily suzuki)use a left hand thread on the sprocket nut,so instead of trying to loosen the nut to the left(as one normally would) try going to the right (as if to tighten it),and if it is as i suspect ,it should come undone...hope this helps