I have an engine knock when the bike idles, this goes away when the clutch is pulled in. It also goes away when the bike ticks over about 900 - 1000 revs?

Sounds like the clutch basket is worn you want to replace it really.

Hi,it sounds from what you are saying that you have got a inturnal falt with the gearbox,im affried the only way to make a propper diagnoses is to take it apart and look at the gear sincros there has to be worn bearings,or teeth on the gears,or the sellector,or something has just manidged to come loose.
I wish you all thhe best.

if ti was mines i would check the clutch basket
"BINGO"

Hey Barry, a knocking from your engine IS NEVER something to be ignored.. BUT, if you do it will go away..WHEN IT BREAKS and your ENGINE QUITS RUNNING!!!!
Take it to a qualified professional!! please....!!

More than likely, it's either a loose primary chain or possibly the compensator sprocket. If the noise is at idle, this will probably be the case. Now, if the noise occurs when you roll the throttle on but goes away when just cruising, you may have a bottom end problem. If I were you, I'd disconnect the battery and pull the outer primary cover off. Check the torque on the compensator nut. It should be torqued to 150-165 foot pounds of torque. You'll need a "locking bar" to lock the engine and transmission to keep it from turning in order to apply that amount of torque. Check the adjustment of the primary chain. 3/4 to 7/8 inch with the engine cold. When you refill the primary with oil, do it with the bike standing straight up. Fill to the bottom edge of the outer clutch shell, the bright aluminum part.

Good Luck
Steve

Not a lot of information to go on. I really need more. Is the sound coming from the engine, transmission, rear wheel, front wheel, or you just can't tell? Does it tick when going down the road with the clutch lever pulled in? While you have the clutch lever pulled in, turn the engine off and see if it goes away. Try different things in order to get a "change" in the noise. Once you find something that makes the noise change, then figure out why.

Now, you're ticking could be an exhaust leak somewhere. Look for black soot around the exhaust pipe joints. I could also be rock hung in your drive belt. Roll the bike and look on the inside of the belt for a small rock or something hung in it.

Ride Safe
Steve