Engine disassembled. Sorry for no pictures but will post them soon.
8 intake valves have missing metal, pretty sure because of a missing air filter. The dirt pressed on between the valves head and seats everytime the the engine spun shaving metal off the valve head. That is at least 5000 times a valve is shut tight per minute. And 10000 times if pulling hard.
Anyone interested in running a engine without a filter thinking they will gain power, take note!
All 4 piston compression ring end gaps are out of spec. Surprisingly the nikalsil bore on all 4 still has the cross hatch pattern visible. Mind you, this engine has crossed over 40,000kms already. Speaks plenty about how effective cylinder plating really is in the long run
