Im in the process of shimming my yz426, and i got all shims out except for the exhaust valve shim(the one that sits under the decompresison lever). Any tips to get this out? Ive tried a magnet and a pick and still no luck. Looks like the previous owner tried to pick at it a little bit and left it in. Both exhaust valves had the original shims but all of the intakes were hot cams shims. Im guessing he had this problem and just left it. The one exhaust valve was still in tolerance (.010 and it calls for .010-.012), the other one thats stuck is at .008 so its a little bit off. Any help would be appreciated, thanks.