Here's another one, take along some duct tape. You can fix a lot of things including a cracked vacuum cap with it. A length of fuel hose is handy too. I once stuffed some short bits of hose behind the points in my magneto when the points spring broke. Not only got me home but kept the bike running till payday.

Let's hope there's intelligent life somewhere in space 'cause it's buggar all down here. -- Monte Python