Vibration Noise

Hi Guys, I’m after some help or advise, I’ve suddenly developed a loud vibration from my sprint. At around 2500 to 3000 rpm a loud vibration can be felt and heard on the bike, after this it clears, and running at speed it’s ok. No loss in performance etc, but it’s annoying the life out of me.

It’s just done 13k and has recently had new chain and sprockets, brake discs and pads (all round) rear hub clean and rebuild. Chain is perfect, no tight links and tightened to correct level. I have around 1 link of play back and forth is I move the wheel whilst the bike is in gear. On the stand running it, it can’t be heard, yes the chain and clutch bang about but this could be expected with no load.

My thoughts are towards the clutch but is there something I’m missing? I’ve checked all the body work etc and double checked everything I had off (I’m a mechanics to trade so fairly competent)

Anyone see this before?

 

I’ll take some tools home tomorrow night and whip it off and test drive. It’s doing my head in that I can’t pin point the source of the noise

 

Gave that a try and no better. Thought it might have been a missfire but changed the plugs and still no better. It’s baffling me

 

It didn’t have the rubber parts as seen on the other bikes. I was thinking this so I’m gonna go over and re-torque everything I’ve had off as a method of elimination