Hi, for once a tale and no question.\n\nA work mate had a Honda XL350 -84 brake down last year.\nBeing busy with other things, it has taken him a year to\ndismantle the engine but last week he brought the oil pump\nto work and we had an opportunity to do the post mortem\nexamination.\n\nThe inner rotor part was mangled and split in two, the outer\nrotor was mangled and a part of it broken off and the oil\npump housing was cracked. In between the rotor parts\nthere was a small bit of wire.\n\nAs far as we can reconstruct events all this started with\na previous ham fisted owner who stripped the oil drain\nhole threads.\nThe little wire piece looked familiar, the only thing with\nthat shape and profile is the little straight bit on a helicoil\ninsert. Probably the previous owner installed the insert\nbut did not brake off and remove this bit, instead it was\nbroken off by the oil plug, then lay at the bottom of the\nengine until one day it decided to take a ride in the\nlubrication system. A bad idea.\n\nAs far as has been seen yet, the cylinder is scarred, the\npiston is totalled, both ends of the con rod are toast and\nthe condition of the crank bearings is dubious. The bike\nis not worth the repair cost and effort and will probably be\nbroken for spares.\n\nEven small jobs deserve attention.