I recently installed a pair of adjustable cam-pulleys on my GSR. Everything ran like a charm till recently, on approx 30-50% of throttle once the rev reach 4000rpm's the needle...
yet again my engine has failed..have a 4g63 and when opened up the head found 2 pistons cracked and 1 fella rusted on top..on cylinder 3....
a nasty scratch was noted inside the blok...arrrrrr!!!