[little j]

the back fire you are all talking about is caused by twisting the throttle when you are parking your bike up for the night.when you have twisted the throttle with the engine off,some fuel has gone into the engine and hasn't been burnt off,so when you start up in the morning this fuel gets sent into the exhaust and is then ignited,this is was cuases the backfire,wakes all the neighbours and scares the shit out off you.lol
don't twist the throttle when putting the back away with the ignition off.
it will f**k up your catalytic convertor eventually.

the light clicking you can hear is the reed valves doing their job.

 

[little j]

this what the reed valves do.

The reeds are a one way valve. Clean air is blown into the exhausts through them to improve emissions and they stop exhaust gas re-entering the system. They don't have any contact with the crank cases or oilways and the air is pumped up through 2 hollow dowels in the block. All part of the kleen air system