Ah yes.... German torque (gutenteit).
Not sure what you're asking for here, but....
1) There are numerous online purveyors of OEM motorcycle parts. Google is your friend. Be prepared to pay stupid-high shipping charges if you don't buy enough stuff. Check in-stock status carefully... it can be tricky.
2) Kawasaki has a dealer network that stocks OEM parts for your bike.
3) There's this truly amazing invention called a "torque wrench." Widely available at local home improvement stores as well as online. Check it out.
PS: The maintenance manual has torque specs for every nut and bolt on the bike. Also available at your local Kawasaki dealer. They'd be happy to serve you.
Maintenance manuals and torque wrenches cost money. I leave it to you to determine whether the cost in time, inconvenience and potential further damage to the bike (e.g. stripped holes) offsets the cost of doing it right in the first place.