desmoman900
650 Society Director
Not damaged enough to make any significant noise.
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Bad noise on road trip. XS650SH
- Thread starter jetmechmarty
- Start date
Sometimes it's not as straightforward as you imagine. I recall once helping out someone who we were both convinced had a crankshaft main bearing issue. We bought everything we needed to strip and rebuild the motor with new mains. It turned out the issue was a loose primary drive nut on the crank. Tightened it up, everything was fine.
desmoman900
650 Society Director
I’ve done the spinning test on all bearings and, aside from a rough cam bearing, all checked ok. Inner crank bearings are easy to inspect just by sliding the races out.
Which bearing are you proposing to cut open?
Keep in mind that this is a 14k miles engine.
Videos lie but that one marty made sure made it sound like the RH exhaust valve area.
João: Did you run this motor to hear the noise before the tear down?
João: Did you run this motor to hear the noise before the tear down?
desmoman900
650 Society Director
Regretably no. I trusted Marty’s judgment and I didn’t want to aggravate the issue.
Here’s the thing. I changed the oil before my departure. There was no fur on the magnets. I drove the bike from Memphis to Perryville, MO, to Cape Girardeau. In that one day of riding, all that fur accumulated on those magnets. I think that’s a lot of accumulation for a one day ride. My speed was low on all secondary roads.
Those black sprays in the lower case.
bores, rings, pistons, pics?
bores, rings, pistons, pics?
I have had CAM bearings on 2 different motors go bad one was on the verge disintegrate
the other sloppy Left side both times.
I am thinking that assembly wont happen with a Cam bearing that shows signs of rough running.
So it will be binned anyways I believe .. Might not be the cause but once opened one can see if the races are pitted
The crank bearing that was causing problems was the outer on left side
The senior most experienced old Mech at the dealer checked it .Involving cleaning and finding the situation when it
stuck slightly I would not be able to find it.
Dont cut it open They .are expensive and comes far down the list.
Depending on where the sound came from
And yes 14 k is low
What does the after oil pump screen look like?
rhkansas
XS650 Addict
Just a thought I had last night - gonna throw this out there because of the sudden appearance of ferrous shavings on the drain plug magnet. What is the condition of the #4 starter gear? A number of years ago, I had a similar occurrence of metal shavings appearing between oil changes on the 1980 SG that is now my son's bike. At that time, I was corresponding with Mr. Russell about articles for the 650 Society newsletter, so I asked his opinion on the matter - he immediately suggested that I look at that gear. He was right (of course). It's worth a look.
I had a FaceTime with João (I can type it, just can't say it) at #Tempio della Velocità. He showed me the #4 starter gear. It looks great.
The question becomes "Where did this come from?" I changed the oil before departure. That screen was clean. There was likely not more than 200 miles on the oil. I had vibration to go with the noise. The bearings all look good.
I had a FaceTime with João (I can type it, just can't say it) at #Tempio della Velocità. He showed me the #4 starter gear. It looks great.
View attachment 365753
The question becomes "Where did this come from?" I changed the oil before departure. That screen was clean. There was likely not more than 200 miles on the oil. I had vibration to go with the noise. The bearings all look good.
Vibration makes me stuck at crank bearing .excessive play. Was there Vibration on standstill also or driving only
No answer, Marty, but I'd be sure to take the oil pump apart and give it a good looking over.
Those bits ferrous or aluminum?
Those bits ferrous or aluminum?
Dang that Jim is fast.........
Metal shards, steel or aluminum?
Metal shards, steel or aluminum?
clutch cushion springs checked?
I can't answer that. I'm in Mississippi. The bike is in Georgia. We'll wait for The Master.
I only felt it riding it and the vibration came and went. It was intermittent. I had to ride a bunch of miles to get a truck and I was very concerned about wrecking the engine.
As a theory thinking out loud
I believe intermittent can happen .If there is a damage on one or a few balls in the bearing it can rotate so that it does not cause problem
thinking like this The sphere ( ball ) has a damage contacting at 6 o clock
if the sphere rotates so the damage is at 9 o clock the damage does not contact the race ( is it called so in English )
runs better more silent.
I believe intermittent can happen .If there is a damage on one or a few balls in the bearing it can rotate so that it does not cause problem
thinking like this The sphere ( ball ) has a damage contacting at 6 o clock
if the sphere rotates so the damage is at 9 o clock the damage does not contact the race ( is it called so in English )
runs better more silent.
