There is quite a noticible notch on all of the valves on my Cali 1100i which has done less than 20k.
A couple of things bother me. The first is the static sweep pattern - I was expecting the valves to rotate but clearly none of them do.
And second the depth of the notch which has or will affect the tappet setting with a feeler guauge.
I have read some stuff on interweb that says the sweep pattern is normal but is it for Guzzi?
I dont think the head has been starved of oil but I havent owned it from new. Soft tips, maybe?
Tempted to file tips down.
Anyone else experienced this.
All help and assistance welcome.
you are right to expect valve rotation and even wear patterns.
you need new Stellite coated valve ends or new valves or, if there is space to fit them: valve caps.
In the future you could replacing the springs on the rocker pivot shaft (that are used to take up axial slack) with spacers you could set the rocker off the centre line by 1-2 mm to get rotation.
Thanks for this.
I hadnt thought about valve caps but I will investigate further.
I must admit I thought the rotation was due to torque reaction to spring compression but I couldnt see why this wouldnt be working.
I did watch what I thought was a good series of videos on Mike’s Machines on replacing valve guides on a Le Mans 1000. It goes into some detail about setting up the rockers but the guy in the video doesnt offset the rockers, in fact he goes to some trouble to centre them.
I havent checked the spring length/shimming yet but I understand from video this could be crtical.
Again thanks for the advice, muvh appreciated
Andrew