Great thanks guy's, i have been changing up closing off the throttle but clutching when coming down the gears so it's good to hear that other do as well. I might not do it all the time though as i'm really not to sure about the china box........
The gearbox on the KudaPro (am assuming that's your bike) is a little more robust than the horizontal motors, and is a far slicker shifting item than your average lifan 125...
You can upshift without the clutch, and as has been stated, you need to shut throttle briefly whilst shifting, but it's not a recommended practise, and should be avoided on downshifts where possible...