Idle gear (plastic) and primary sprocket failure – 2017 1299 Pani

Just received notice from DHL that my gears have shipped. Says they will be here by the 9th which is in 2 days. I'll believe THAT when i see it. Customs ought to slow things down a bit.

Amazingly quick shipping and Customs transit for my package. I ordered on the 4th and it arrived on the 10th. Pretty good IMHO. I ctualy expected it to take about 2 weeks

About the gear set. I really appreciate the lightening holes in the gears. You want them to transmit power, not add weight and momentum to the process (which would increase cumulative wear). The thrust washer was on the outside of the bubble wrap, which is fine. I expected it to be on the inside of one of the bubble wrap packs. It's snowing here at the moment, and the temps are in the low 30's I'm planning on doing the installation on Monday when it will be in the mid 40's.

So I was changing the gears today, basically I just pulled things to the side for clearance and removed the bolts and the cover came off with no hassles. All the cover bolts seemed to be under-torqued and my lightweight 3/8" drill easily broke them loose. They will definitely better a bit tighter when reinstalled. A little jiggling and it was out and took all of about 2 minutes to change the gears. Then I started cleaning things up using Carburetor cleaner and a paper towel. The factory sealant came off very easily and was very soft and pliable, which may explain a bit of oil seepage I hade from teh bottom of that cover. While checking out all the OE pieces, I checked the o-ring mentioned above and it seems fine so I'll re-use it. However, I checked the seal from the end of the crankshaft to the cover, which ensures no oil leaks between the pressure passage in the crankshaft and the oil pressure sending unit. I noticed what looked like a rubber filament inside the metal part of the seal. I used some small needle-nosed pliers to pull it out, then did a close examination of the seal itself. There appears to be a slot in the seal body for the lip of a rubber seal, but there is no rubber seal. The crankshaft snout is 14mm and the inside of the metal part of the seal is 14.3mm, which seems terribly excessive. I found some pictures on line that show what appears to be a wide rubber lip, so I'm presuming that this seal assembly is now bad and needs replacement.

Any help out there?

Thanks in advance.

Here's some shots of the OEM gears. They look pristine at 11 years old and 28,000 miles. I use Motul 7100 15W50 or 20W50 exclusively since the first oil change I did at 10,000 miles (bought used at 9500 miles). Oil is changed every 7500 miles according to the service interval from that time.