As you can see on the pictures below, my bumbstick was a little bit hungry and started to eat lifters:
Bad lifter on the right
Bad lifter on the right, zoomed in. Surface completely gone.
Bad oil is the cause of this.
Jarno, Andy and Antoon inspecting the intake-valve on cilinder# 7.
A familiar sight which I'm getting used to right now: a red car with an open hood and half an engine in it...* sigh *
Can you say Purple Cam?