The most expensive part in this assembly is the Head Assy,cylinder.
The Bolt(6x39) is the most widely applied product in the TL1000R 2001 (K1) USA (E03) FRONT CYLINDER HEAD ( eight times ).
A sample from the products for the Front Cylinder Head include: Bolt,stud, Screw, O Ring(d:2.4,id:55.6), Pin.