[Magilla]

Good news. It appears Honda has discontinued the countershaft bearing installed in 2022-2024 models and now offers two other choices. You can use the updated part or the one used on the older models. One costs more than the other.

2022 - 2024 :
91015-KZV-J01
BEARING, RADIAL BALL (6203)
(NA USE ALT:96100-62030-00)

2022 - 2024 (updated) :
91015-KSS-901 $5.60

- 2021 :
96100-62030-00 $8.38

 

[Magilla]

Our 22 groms were shipped out of a southern California port to massachusetts (waited 5months and every few weeks checked w/dealer on there location) no bearing issues here.

The Groms I see in stock are from Chesapeake, VA. The labels on Yamahas say Tacoma, USA and Kawasaki/Suzuki say Los Angeles, CA.

 

[jake'snewride]

Magilla- I'm not going to argue with you. We bought ours and recieved june or july of 2021 me and my son were just a handfull of owners that got them this early. Remember Covid when shipping containers were shipped and waited endlessly in ports and sent to different ports across the US? Yes that was us but being patient paid off- The salesman is a good acquaintance of ours and gave us updates as soon as he got them.
Unless of course we were lied too.
These are groms not monkeys so posting in the monkey section is probably pissin' the monkey guys off, have a great day

 

[Zigafomana]

Just a quick update after my appointment with the dealer today. First off, I had to ride the bike almost 15 miles to get the noise to show up this morning. I finished that ride at the dealer to get them to test ride it hot and noisy. They came back and told me my clutch was out of adjustment and the noise was the chain being too loose. I paid them to tighten it up despite checking the adjustment the day before and finding it within spec. Went for a test ride before loading it back up to see if the noise was truly gone. 7 miles later the noise is there and just as loud. Back to the dealer. This time the service manager and another employee took it for rides. They came back, asked to see my video of the noise then told me it was the oem tires making a whine noise. I asked them how shifting could change the noise the tires made. They had no real response. I asked what the next steps were because it was still broken. I was informed that the next steps were to break the engine unit open and look for damaged parts. If they find damage, warranty should cover repairs, if not I'm on the hook for ~$1000 in labor. So I decided to roll the dice. An appointment is set for end of next month ("first available opening"). I said I'd spend the next month trying to get this thing to destroy itself and hope it didn't lock up while I was riding. I was met with nervous laughter.

I'm stoked on my first legendary Honda experience. I've had better luck with harleys, even 20 year old harleys.

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[R0B]

Well, that's brave and potentially expensive, so I wish you well. I think your destruction option would be the best option for a new engine. It's odd that they could have potentially made a design error on the new engine, as we all know they've been around forever in different formats and have been previously considered indestructable.

 

[Zigafomana]

It's a gamble for sure, but I want to see this through. I've found others in various corners of the internet with the same problem. I've only read of one person that got the dealer to open up the engine and find damage. Most everyone else stops updating the thread, or just gets mad and sells the bike. I really like this little bike and I'm willing to take one for the team, so to speak.

As for riding it into the ground before the next appointment, I think it's already working. I put on almost 100 miles today in ~100 degree heat. It's making the noise more, louder, and it's even made the noise in first a few times. It's going to be my ride to work for the next month, about 25 miles each way.

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[Magilla]

I hit 70 mph today and I got the noise . Had to slow down quite a bit for it to go away but stayed in 5th gear. It was over 90*F out and I'm running a good 10w40 full-synthetic at 2300 miles. Once cooled down, no noise up to 60 mph. I don't plan to do much over 60 mph in the future. Previous highest speed was about 65+ with no noise.

I won't be looking for warranty work unless it happens again. In the mean time, I'll try to keep it under 65 mph like I normally do. Bike still runs strong .

 

[Magilla]

As for riding it into the ground before the next appointment, I think it's already working. I put on almost 100 miles today in ~100 degree heat. It's making the noise more, louder, and it's even made the noise in first a few times. It's going to be my ride to work for the next month, about 25 miles each way.

Any updates? Mine has been quiet since keeping it under 65 mph.

 

[Zigafomana]

Nothing yet. I just dropped mine off at the dealer for tear down and inspection. My last ride was pushing 100 degrees out and I put 75 or so hard miles on it. It made the noise once or twice in first gear, so its getting worse. I didn't want to break 500 miles before it went in as I didn't want to do the first oil change and have them blame it on my service work. At 475 miles when I dropped it off, the oil was very dark, almost black and water thin. Something is going on in there. As soon as I hear from the dealer and inspect the guts in person, I'll share the news and pictures.

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[camdrag]

Following I just got the whine this morning in 3rd to 5th stops when I shift into 2nd.

 

[collin.schulz]

I just had this issue with my 23 monkey. It happened at 560 miles after going about 50 mph for about 5 miles. I've seen other posts on this an know it happens on the Grom also.It has been fairly well documented that the issue is the bushing/gear second gear. This post has some pictures Engine noise 2023
Ive also seen other pictures showing the shaft being discolored where that bushing sits. As far as I can tell, none of those parts have been changed by Honda, as the part number is still the same. Mine stopped making the noise shortly after I slowed down and shifted into second. When I got home I did my 600 mile oil change. Hopefully the issue doesn't come back.

 

[Zigafomana]

I got word from the dealer today and it sounds like the second gear bushing. I'm going in on Tuesday to take pictures of the carnage and hear what honda has to say. I'll keep yall posted.

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[collin.schulz]

I'm looking forward to hearing what they have to say. Let us know if there is something specific the rest of us can say to our dealers or Honda to get this fixed under warranty.
Here is another explanation of the issue

 

[Magilla]

That makes more sense than a bushing that's too tight which I would expect more serious problems to occur shortly after squealing. If I was replacing mine, I'd buy two or more bushings and use the thickest one. There might not be any measurable difference but they're cheap enough to check. Even the new one in the video looks looser than necessary.

 

[Magilla]

 

[camdrag]

So mine started making the noise at just under 200 miles. I wanted to make sure it did it again when I went to work. Low and behold it did. I changed the oil with 10w-40 Mobil 1 race oil, and changed the filter. The oil when I drained it was almost the consistency of water. I took it out for a similar route to work which is at or above 45. I couldn’t get it to make the noise again and on the 2nd half of the trip I was taking to higher rpms to see if that would effect it too. Still no noise I’ll update after a few days of riding. I think it may the oil Honda is using can’t handle the temperature.

 

[Zigafomana]

Just got home from the dealer. It looks like I had a second gear bushing failure. The gear is blued from the center out. The thrust washers on either side of it and it's bushing are all purple/blue and it looks like the shaft it rides on got hot too. Nothing is galled or scared up at all, just obviously very hot. The gear and bushing do rock on the shaft quite a bit. I was told the oil didn't show metal when they drained it and they find no other damage inside the cases. The dealer is waiting on final word from Honda as they asked for pictures of the damage.

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[collin.schulz]

It looks like a lack of oil getting to that surface. I'm not an engineer, but I don't see how replacing the parts with new parts of the same design will prevent this from happening again.

 

[Zigafomana]

Talked to the dealer again after they spoke with Honda. Honda is going to warranty and replace all the heat effected parts and the output seal. Honda also was very adamant they get the damaged parts as they are trying to sort out the cause and a fix.

If more people would press their dealer to investigate I'm sure this would be a much bigger problem for Honda. It seems like most people get fed up with the process and just live with it or sell the bike. I'm pleased I took the leap of faith and made the dealer tear into it. I've lost two months and counting of riding season trying to deal with this, but I feel ill be happier with a fixed bike so it is worth it.

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[R0B]

Talked to the dealer again after they spoke with Honda. Honda is going to warranty and replace all the heat effected parts and the output seal. Honda also was very adamant they get the damaged parts as they are trying to sort out the cause and a fix.

If more people would press their dealer to investigate I'm sure this would be a much bigger problem for Honda. It seems like most people get fed up with the process and just live with it or sell the bike. I'm pleased I took the leap of faith and made the dealer tear into it. I've lost two months and counting of riding season trying to deal with this, but I feel ill be happier with a fixed bike so it is worth it.

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All credit ro you for having the guts to risk your own money in pushing the dealer to fix it.