Normal
Change em. you should see no light through them. although this probably isnt the main issue, do it! I recommend these http://www.ebay.com/itm/Boyesen-Power-Reeds-YAMAHA-YZ250-2003-2004-YZ-250-REED-/400470252085?pt=Motorcycles_Parts_Accessories&fits=Model:YZ250|Year:2003&hash=item5d3de31a35&vxp=mtr