It lets the warm air from the cylinders waft up and keep the jewels toasty.Note the cutout in the seat ether a nice place for the family jewels to relax or a valve cover way to close to the jewels.
Actually, looks like an access to the cap for the filler neck going to that tank under the seat... which I assume is the oil tank?Note the cutout in the seat ether a nice place for the family jewels to relax or a valve cover way to close to the jewels.