Right click on the Pict., and you will see "edit" in the context menu. Click Edit. and Paint will open up with the pict. Top left you will see "re-size". Click that, and an option box will open. I usually resize by percentage. It automatically will keep the aspect ratio intact.
You're gonna have to post up the pict or draw a pict so we can see what you are referring to.
Is it a CVT cover bolt? If so that is ok but I would still stop by Ace, and get a replacement.