Hi all, I have been going right through my bike recently (2002 WR426F) to check everything is all good ready for a bit of track work and all was looking good until i come to checking and adjusting the valves... Both 2 exhaust valves were nicely within spec as was the LH intake valve, but the middle and RH intake valves were extremely tight (couldnt fit the thinnest feeler guage in 0.036mm) They currently are running 1.40 shims in both center and RH intakes (tight ones) and a 1.65mm shim in the LH intake (in spec) valve. I have put my numbers into a valve shim calculator and it has come back saying I need a 0.8mm thickness shim to correct the 2 tight valves but looking at valve shim kits online they state the thinnest they have is a 1.20mm So my big question is any thoughts on the huge variation between intake valve readings and would needing such a thin shim to correct the valve clearance mean the valve seats are too far worn into the head? Sorry for the long read hoping someone can shed some light on this for me Thanks in advance !!!