Chain noise i have just fitted a new chain and sprocket. there seems to be a strange whining noise coming from the engine area when i am riding! will this go away after a while?

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.

You'll have to remove the primary cover in order to see inside. I would check the compensating sprocket nut. They have a tendency to loosen up for some reason, and that causes a strange noise. Check that first. Second, check to make sure your automatic chain tensioner is working properly. We've had some in the shop that ran the chain too tight, causing a loud whining noise.

No, the whining noise come from the primary chain as it spinning over the clutch and the sprocket motor.Perhaps the adjustment is too tight,this will cause the noise.Do you check the chain tight through the inspection cover on the primary .You need a 1/2 to 5/8 in free play.

It could be your primary chain and chain guides,the chain wears and the guides harden with time and will transfer more internal engine noise through the transmission.
There is also on the primary hub/sprocket and internal rubber damper all this stuff ages with in time loosing there dampening qualities.
resulting in amplified mechanical noise.

Your chain would have to be incredibly loose to slip the sprocket. Enough that it would come off the bar before jumping the teeth on the rear sprocket. Highly unlikely.

most left hand noises invole the compensating sprocket/alternator area, and back along the primary chain to the clutch hub. bearing failure would be noticed at low rpm, so i doubt this problem has anything to do with your 1550 kit

No.That was the problem.The chain and the sprockets needed to be renewed.
When you will take, the rear sprocket's base, off the axle check it's bearing.Just put your finger in and turn it slowly to see if it "locks" instantly.It will be nice if you renew it now that you disassembling the chain drive system.

If the 'grinding' only happens when the bike is in motion, the problem is probably not inside the engine. Remove the chain and then start the motor. Put it in gear(s) and listen for the noise. No noise eliminates the engine as the problem.

Now lay the chain on the concrete and 'compress the chain in a straight line. Mark the end of the chain on the concrete. Now hold on to one end of the chain and stretch the chain. Did it stretch more than one inch? Replace it if it did. Look at the chain. is it rusted? Is it limber or do the links resist bending? Replace the chain if rusty and stiff.

While you are doing all this, check the rear wheel. Does it spin freely. Make any noise? Does the rear brake go on and off properly? Next check your sprockets. A bad sprocket will ruin a new chain. The ends of the teeth on the sprocket should be rounded. A worn sprocket shows pointed teeth. I have seen teeth so pointed they could pop a balloon. LOOK at both sides of the front and back sprockets. Are they rubbing against anything anywhere? Look at the chain, any rubbing? Is the tire rubbing on anything? Did the prior owner install heavier sprockets and bigger chain than stock sprockets and chain? > Check with the dealer.

Chances are you will find the problem if you do the above.
I hope you can rate this solution as a 'FixYa".

That is correct. If your engine is whinning at about 2000 rpm's and its a high pitch whine, you need upper timing chains and chain tensioners. aka plastic gizmo as you called it. The timing chains ride off the plastic portion of the tensioner causing the noise, basically the chain is riding on steal stub from within the tensioner, that's where the noise is coming from. Waranree on this is 5years or 60000 miles which ever comes first. And the new tensioners are updated parts.