non GS. Pic of failed rod bearing. SV650

[xDownSetx]

I have a DL650 which has the same motor basically. Is that the front piston rod? If it was wrecked I'd assume that it might have been owned by a guy that liked doing stunts.

The SV has a real problem with the front cylinder oil pickup starving during whillies. Does the topend show any signs of oil starvation too?

[BlackStar]

I don't see any heat damage at all, not even on the bearing insert which is usually what you get from oil starvation. Looks more like it was hammered to death. Any detonation problems. Complete oil starvation would likely show up on the main bearings as well since they are the source for the rod oil.

[SqDancerLynn1]

I had a chrysler 2.4 that was running, a loud knock. Their was no bearing left at all, rod still on the crank. Was a bit$h to wash every part of the engine

[Redman]

Thanks Guys.

Yes, will need to investigate the oil passages. That engine has these little spring loaded jets with o-ring seals in various places such as inbetween the crankcase and the cylinders. And inspect the other rod bearing and other crank bearings. My son is taking the engine crankcase over to a gearhead friend's place that has pullers and such so can "split the case" to be able to furter inspect the crank and crank bearings.

Thanks for the sharing the observation about the rod not being discolored. Havent had the experice of other failed bearings to know the difference.

WHen look at the crank under the bad rod bearing, can barely see a difference between that and the crank under the other rod. It is only a slightly little bit not a shiney. So not really expecting any crank damamge, but may need to have the surface refinished.

Son said engine was maybe making noise when he left home and 5 hours later was knocking real hard even at idle. That is when he left it at a dealer and found another way back home.

Have seen no evidence of engine having been dissasembed previously. Do know the bike itself was a repaired wreck. And engine had yellow paint pen number on bottom of crankcase, so maybe its from a salvage yard.

But one therory I have is that the bearing was improperly installed or was the wrong size. So it spun.

Any other observations / advice welcomed.

[rapidray]

I'm willing to bet a fair sum of money it was wheelied quite a bit in the past. Ray.

[Dave8338]

Top and bottom halves, switched?