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New design for rod bearings?

  • Thread starter Thread starter jdmfreak1992
  • Start date Start date
J

jdmfreak1992

Guest
Ok so I'm rebuilding my 82 GS650GL and I'm about to install the rods onto the crank and noticed that the rod bearings are the new style and they are the correct part number however they do not have a hole drilled into the top half of the bearing for an oil passage is this normal for the new style? Because that blocks off the oil passage in the rod that looks like it squirts oil on the back side of the piston.
 
If i remember right, the new bearings without the oil hole came in with rods also without. They did however have a couple of reliefs on the side faces of the big ends which allowed oil to fling up onto the bores.

My memory may well be totally wrong but I'm sure others here can help.
 
GregT said:
If i remember right, the new bearings without the oil hole came in with rods also without. They did however have a couple of reliefs on the side faces of the big ends which allowed oil to fling up onto the bores.

My memory may well be totally wrong but I'm sure others here can help.
Click to expand...


Ok because I'm just reusing my old rods they are in spec just the bearings were shot.
 
I have another question did the 82 gs650s have thrust bearings between the crank and the top half of the case I see their is a sport machined in the top of the case next to one set of the main bearings and I can't remember if It had some or not but I could have sworn they did and that I stuck them in a bag and marked them.
 
Page 25 of the factory Service Manual supplement for 82's says that only the bearing material was changed, from engine # 122709 on, no sign or mention of a hole or groove, as is the case on the crank bearings, not the rod bearings, and your part # should be 12164-17E01-0A0 (or B, C, or D, depending any oversize requirements). The first replacement bearing shells were 12164-34210-010, (or 020, 030, 040, the above alpha-numeric is supposed to be the very latest) interesting question, because the fiche for these bearings does actually show a hole in the bearings, kind of misleading. Good luck, let us know how it turns out, are you using plastigage?
 
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