Squealing noise around stator and slow return to idles

[Brickyard]

Wondering why my original 14mm transmission bushing on the right side is tapered, but the new bushing on the left isn't. Should I be concerned?

Upon quick inspection, haven't found anything out of the ordinary inside the engine. I'm beginning to think the 10,000 miles on the speedometer are original.

[Brickyard]

Brickyard

Those pistons look pretty nasty. The oil ways you show in your video are there to catch oil flowing back down from the top end (cam tunnel) to provide a bit of feed for the main bearings. The main oil source to the main bearings is direct from the oil filter and is related with the oilway you point to at the front of the top crankcase.

I suspect you have debris in your oilways and this debris could be blocking flow into the crank and then up to the cylinder / piston area. The piston / cylinder lubrication comes as oil thrown of the crank / big end.



You really need to strip the motor and clean all those oilways tyou can find as well as cleaning the the centrifugal oil filter and filter screen around the oil pump. If you can, you should get the crank stripped and cleaned, as well, No oil to that piston probably means that the oilways in the crank are blocked.



The debris from the 'dry' piston is going to make the situation worse.

G

Videos will have to do until I can post pictures...

https://www.youtube.com/watch?v=vps9ClM ... e=youtu.be

G, in the area you circled in red, I found what looks to be a gasket or dried gasket maker. Please confirm whats in my hand should be in my hand and not in that area you pointed out...

[Hoosier Tom]

Wondering why my original 14mm transmission bushing on the right side is tapered, but the new bushing on the left isn't. Should I be concerned?

Upon quick inspection, haven't found anything out of the ordinary inside the engine. I'm beginning to think the 10,000 miles on the speedometer are original.

If you're talking about the ridge running around the center of the original bushing on the right being tapered, that is wear. You want the ridge to be shouldered like your new one on the left.

HT

[G-Man]

Brickyard

That is blocking the splitter which shares the feed from the oil filter to the left hand bearing with the right hand and would account for the lack of lubrication to your right big end and piston.

It looks like general sludge and perhaps parts of your broken-up tensioner wheel. You need to take a careful look at your right hand main and big-end bearings. Run a cleaning brush through the holes at that point and any other. The dirt / debris will have gone further than that plug of material you have in your hand....

What does the inside of the oil filter look like?

G

Brickyard

Those pistons look pretty nasty. The oil ways you show in your video are there to catch oil flowing back down from the top end (cam tunnel) to provide a bit of feed for the main bearings. The main oil source to the main bearings is direct from the oil filter and is related with the oilway you point to at the front of the top crankcase.

I suspect you have debris in your oilways and this debris could be blocking flow into the crank and then up to the cylinder / piston area. The piston / cylinder lubrication comes as oil thrown of the crank / big end.



You really need to strip the motor and clean all those oilways tyou can find as well as cleaning the the centrifugal oil filter and filter screen around the oil pump. If you can, you should get the crank stripped and cleaned, as well, No oil to that piston probably means that the oilways in the crank are blocked.



The debris from the 'dry' piston is going to make the situation worse.

G

Videos will have to do until I can post pictures...

https://www.youtube.com/watch?v=vps9ClM ... e=youtu.be

G, in the area you circled in red, I found what looks to be a gasket or dried gasket maker. Please confirm whats in my hand should be in my hand and not in that area you pointed out...

[Brickyard]

Wondering why my original 14mm transmission bushing on the right side is tapered, but the new bushing on the left isn't. Should I be concerned?

Upon quick inspection, haven't found anything out of the ordinary inside the engine. I'm beginning to think the 10,000 miles on the speedometer are original.

If you're talking about the ridge running around the center of the original bushing on the right being tapered, that is wear. You want the ridge to be shouldered like your new one on the left.

HT

Thank you for the clarification, HT.

[Brickyard]

G, I forgot to mention that i serviced the oil filter last year, so it doesn't look too bad...

Brickyard

That is blocking the splitter which shares the feed from the oil filter to the left hand bearing with the right hand and would account for the lack of lubrication to your right big end and piston.

It looks like general sludge and perhaps parts of your broken-up tensioner wheel. You need to take a careful look at your right hand main and big-end bearings. Run a cleaning brush through the holes at that point and any other. The dirt / debris will have gone further than that plug of material you have in your hand....

What does the inside of the oil filter look like?

G

Brickyard

Those pistons look pretty nasty. The oil ways you show in your video are there to catch oil flowing back down from the top end (cam tunnel) to provide a bit of feed for the main bearings. The main oil source to the main bearings is direct from the oil filter and is related with the oilway you point to at the front of the top crankcase.

I suspect you have debris in your oilways and this debris could be blocking flow into the crank and then up to the cylinder / piston area. The piston / cylinder lubrication comes as oil thrown of the crank / big end.



You really need to strip the motor and clean all those oilways tyou can find as well as cleaning the the centrifugal oil filter and filter screen around the oil pump. If you can, you should get the crank stripped and cleaned, as well, No oil to that piston probably means that the oilways in the crank are blocked.



The debris from the 'dry' piston is going to make the situation worse.

G

Videos will have to do until I can post pictures...

https://www.youtube.com/watch?v=vps9ClM ... e=youtu.be

G, in the area you circled in red, I found what looks to be a gasket or dried gasket maker. Please confirm whats in my hand should be in my hand and not in that area you pointed out...

[LOUD MOUSE]

The bushing is the bearing for 1st gear and the 21 tooth counter shaft.
The raised area is the separator between the 1st gear and 21 tooth counter shaft.
That area can be worn completely away with engines which have lots of hours on them.
IMO yours is warn but not destroyed. ...................lm

Brickyard

Those pistons look pretty nasty. The oil ways you show in your video are there to catch oil flowing back down from the top end (cam tunnel) to provide a bit of feed for the main bearings. The main oil source to the main bearings is direct from the oil filter and is related with the oilway you point to at the front of the top crankcase.

I suspect you have debris in your oilways and this debris could be blocking flow into the crank and then up to the cylinder / piston area. The piston / cylinder lubrication comes as oil thrown of the crank / big end.



You really need to strip the motor and clean all those oilways tyou can find as well as cleaning the the centrifugal oil filter and filter screen around the oil pump. If you can, you should get the crank stripped and cleaned, as well, No oil to that piston probably means that the oilways in the crank are blocked.



The debris from the 'dry' piston is going to make the situation worse.

G

Videos will have to do until I can post pictures...

https://www.youtube.com/watch?v=vps9ClM ... e=youtu.be

G, in the area you circled in red, I found what looks to be a gasket or dried gasket maker. Please confirm whats in my hand should be in my hand and not in that area you pointed out...