In this schematic the "Bolt,6x30" is used most often.
The most reasonably priced component used on the Kl650a7f Klr650 2007 Usa California Canada Crankcase is the Screw-cntsnk Hd,6x16.
A sample from the products for the Crankcase include: Plug,oil Line,7.2x8, Bolt,6x30, Pipe, Plug,oil Drain,12x15.