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I have had this noise once on my 22. At first I thought the chain was rubbing on metal like one of the chain guides came off or something. The more I listened and thought about it I figured it could be a bearing vibrating. I'm not sure how long a bearing would last making that kind of noise. It definitely does not sound good.

My one time experiencing this was under very light throttle in 3rd or 4th and when I downshifted and applied a handful of throttle it abated. I did notice that the noise did not change with the clutch pulled.

I have not reported mine to Honda as, like many others have found, they won't be able to replicate the noise. I am hoping, with time, the problem will be diagnosed and then I will repair it or have it repaired.

Seems like gromsquatch, I believe is his name, on YouTube has had it many times.

By the way, mine has about 700 miles on it. Motor and transmission are stock. Noise happened right after first oil change.
 

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My 2 cents for what it's worth

I first learned of this noise issue watching a youtuber that goes by Grom X Squatch with new content on the Grom from months ago. He posted a clear video of the sound while riding and said his dealer told him to just ride it until something catastrophic happens and then they would proceed with repairs. This youtuber has been very vocal and commented all over social media about the issue yet I could never find evidence where the issue was diagnosed and fixed. It is noteworthy to mention this youtuber is on the heavy side and off roads a lot on dirt trails.

This morning I was looking at comments on a video about a chimera clip-on mount for the Grom. In that video's comments Grom X Squatch posted and passed along what this may all come down to:

"it's caused by an over tight chain and jumping or heavier riders"

I can see where poor chain calibration or a combination of these factors could be the root cause. His full comment on the video: "this is what someone said on a video yesterday... 3 people that have had full engine replacement from 1 Dealer in my area,so it's a known issue, the main bearing housing slips in the stator side caused by the gearbox shaft bearings being to thin,it's caused by an over tight chain and jumping or heavier riders,total rebuild, split cases,specialist tools,,re machine the bearing housing, but it's to thin,,,,thanks honda"

Whether the shaft bearings were changed to be thinner between model generations remains unconfirmed as well as a "full engine replacement" being really necessary to correct the issue. But I can understand where an engine replacement happens so it can be sent to Honda during the diagnosis phase.

Clearly anyone buying a 2022 model should first check chain tension and correct it if necessary before accepting delivery on the newest bike.

As I've said, every new generation Grom I've seen on show room floors had an unnaturally tight chain. Both bikes I bought were given to me in just that state. I found it laughable but at least I caught it and corrected it before riding and break-in commenced.


I have had the noise return once since the first time.

I have not ridden much as it has been winter here in Colorado. I pulled her out 2 weeks ago and rode for about 3-4 hours. The noise happened within the first 20 minutes of riding. As soon as I heard it I slowed down and downshifted and it went away. Not to return for the rest of the ride. It lasted all of about 5 seconds.

The first time it happened I was following traffic going up into the mountains. So this was possibly a little extra strain on the motor... Shouldn't have caused this issue.

The second time I was 2 up so definitely a little more strain on the motor but agian shouldn't be causing this issue.

A little reference info. I weigh in at about 165lb starkers. My daughter (passenger on 2nd incident) weighs in around 90-95lb. I do not treat my grom rough. It has been offroad once. (Too rough for the grom. It's a road bike for me. I have a KTM500EXC-F for where the pavement ends.) I have never jumped it. I don't ride wheelies on it. I'm more of a canyon carver. I beat on the suspension and tires more than anything. I will say my grom is screaming somewhere near redline for probably somewhere approaching 30% of my rides. Sometimes alot more, sometimes alot less.

As far as the chain thing. I generally perform regular maintenance on all of my bikes. The chain on my bikes are frequently checked for kinks and excessive wear. I adjust the chains per factory specification. I go as far as to adjust the throttle stops and the brake and clutch throws first thing upon bringing a new bike home. I do not trust a stealership further than I can throw the building.

I am still hopeful that a definitive issue will be found and addressed by Honda.

I still have not reported my noise to the dealership as fu*% them. I guess I should call Honda directly although I am sure they will tell me to take it to the stealer who will just keep my bike for a week, waste my time, and tell me its fine.

At this point I'm just going to continue ride it like I stole it and maintain it like I'm keeping it forever. If it breaks it breaks. I just hope the rear doesn't lock up while I'm in the mountains and I die. I guess at that point my wife could sue Honda and my family would be ok.

...

Wow, I really went somewhere with that... You all just ignore that last part. ;)

Keep the updates coming. I will do the same. I obviously have not been checking this forum often but I do check it.

(Edit: I turned on notifications for this thread.)
 

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Just commenting to say that my 22 Grom is doing this. Started around 400-500 miles. I changed the oil and at 760 miles, it's still doing it. I also tried adjusting the clutch cable a few times. No change.

It's at the dealership right now.

Any new information on this issue?
How often are you having the noise? At some point, with enough complaints, Honda will have to address this. Be sure to let us know what the dealer says.


Just wanted to update on my situation. I'm at 1,600 miles now. I have still only had the noise 2 times. I did install an Akrapovic full exhaust at about 1,000 miles. It is pretty loud so im not 100% that I would hear the noise over the pipe... so... there's that...
Tire Sky Wheel Vehicle Cloud
 

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Bummer. Almost what I expected. I would follow up with a call of my own to Honda NA (assuming you are in North America) and confirm the the "fix" for your issue is indeed to loosen the chain out of specification. If they say yes, I would ask them to send me an Email from a Honda email address that states specifically, "It is ok to drive my 22' Honda Grom with a chain set way out of spec as listed on all of the safety placards both on the motorcycle and in the owners manual." And I would want them to include the statement that, "loosening the chain well beyond what is considered to be in spec, by the safety stickers on the motorcycle and in the owners manual that came with the motorcycle, fixes the known squealing noise issue on the 22 Honda Grom." I would ask for some very specific wording or something very close to it.

They are not going to send you that email.

But maybe it will push the (your) problem up the ladder.

Adjusting the chain out of spec is not the fix for this issue.

WOW!!!!

🤣 😂 🤣 😂 🤣 😂 🤣

It's so not funny that its funny!! How can that be the fix?!?!!?

🤣 😂 🤣 😂 🤣 😂 🤣 😂 🤣 😂 🤣

Huh....

SMH
 

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I do believe this will get addressed, eventually. It sucks that we have to deal with this until it does.

I'm not sure what they are doing but they need to buy back, or offer a new replacement, on 5-10 of these bikes that are having the near constant noise and give them to a small team of engineers. They could diagnose the problem and propose a solution in no time.

I think the issue is maybe this has not escalated to a high enough level for the right people to see it. This is bad press for Honda and I'd expect if the right people knew about it that it would be fixed. I guess it could be the opposite. The right people do know about this and their stance is, "No, we are not going to fix this issue." I'd expect it is the former. There are no catastrophic failures to date (that i know of) and I guess relatively few complaints.

I am going to call Honda North America and see what they say. I will tell them I refuse to take the bike to a dealership until a real solution is found. I am going to cite @Yellow22 's and GromXsquatch's rediclulous experiences as to why I will not take it to the dealership. I just want to tell them my grom is having this issue so add one to the list. I'd encourage anyone in my same circumstance to do the same.

The more visibility this issue has the more likely we are to get a satisfactory solution.
 

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I just called another dealer and asked them about it.

1. No, he's never heard of this issue.
2. Since I've already taken it to the other dealer, I need to just take it back to them. (They're 2hrs away.)
3. If the issue only happens after 20 miles or so, I'm kind of screwed. He said no dealership is going to ride my bike that far to test it out because they don't have the time and Honda doesn't pay them to do that. He suggested I try to speed it up, maybe let it idle for a long time to let it get good and hot before riding it and see if that makes it happen faster.
4. I'm currently looking for cheap dirt bikes in my area to go trade for.
I wouldn't be so quick to get rid of it unless, now that you have ridden it you have decided a Grom is not for you and you actually wanted a dirtbike. IMO the 22' - 23' Grom is the best available. I am sure a solution to this issue will be found whether it be Honda or aftermarket. And as far as I'm aware there have been no catastrophic failures due to this noise. ( I hold my breath and cross my fingers as I type the previous statement.)

My 2 cents... You do you, and 100% I get it. The Grom is one of 5 bikes I own.

Disclaimer: The above is in no way to be construed as advice on what you or anyone should do with their Groms and/or any other item across space time. If you feel that your grom/car/truck/other motorcycle/intergalactic space tricycle are malfunctioning or unsafe to operate, have your vehicle towed/warped to the authorized and qualified repair facility of your choice.
 

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I wouldn't use GromXsuatch in your example to Honda. After he came to the realization he was running his chain too tight causing the issue, he made adjustments on the looser end of chain slack parameters and hasn't had the issue come up in a long time. Seems this problem was solved for him.
I did not see this. I assume he has a video on this? I'll look it up. Still curious to why a properly adjusted chain would cause this noise...
 

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He hasn't made any videos about his Grom experience for months while constantly makes other unrelated ones but you can find in his comments where he admits his folly from having the chain adjusted too tightly.

I don't think a properly adjusted chain causes the issue. It's when the chain is set too tight where the issue begins to arise.

I've paid attention to this issue from day one and have yet to find definitive answers. I keep finding where someone complains about it and others suddenly come out of the woodwork and pile on yet inexplicably no one seems to follow through and share their solution.

Whether people are shy about sharing the simplicity of the solution or what action Honda may have taken to correct it remains a mystery to me.

One thing that the shared experiences I've found have in common is it appears to happen with bikes with lower mileages. No one with high mileage bikes seems to have an ongoing issue. Maybe people are learning something and have taken corrective measures but they're sure not sharing for whatever reason. :censored:

Hmmmmmm... I am certain my chain is not too tight. It has either been in spec or loose as I checked it day one and periodically afterwards. I have only heard the noise on mine twice and I just rolled 1,700 miles today. I know thats still low mileage... mine made the noise right after the first oil change, so 600 miles then again before the Akara exhaust so sub 1,000 miles. So I have not noticed it in 700 miles. Maybe mine is "fixed". LOL!

I don't get the not sharing thing. Seems like gromx made so many videos complaining about it, IMO he owes an explanation for his solution.

I hope it is just the chain as I can't wait to replace mine anyway. IMO non sealed chains are garbage. I have never oiled it and I don't plan on it. When it wears out I'm getting an x ring chain.
 

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Agreed. But after all that exaggerated heated hate he put on Honda I'm thinking it might be a little embarrassing for him to come out and say it was due to something he was contributing to the cause of.



That right there. Be careful! I was of the same mind. After 1700 miles on your bike it wouldn't surprise me if you check chain slack and it's fine. But, and this is a big but, if you put the rear on a stand and slowly turn the rear wheel keep checking the slack and you may find a tight spot.

If you wash your bike a lot with a garden hose - chain rust likes to hide inside the inner links and not initially presenting on the outer side surfaces and might go unnoticed.

I was guilty of this, but it's how I last discovered when I needed a new chain - I rotated that wheel a quarter turn and suddenly my perfect slack went tight! Bam! Kept rotating slowly, now it's fine, rotate, tight again.

Looking at the big picture I think a lot of new riders are prone to adjusting their chain from only one reference point in the chain and not rotating to different areas of the chain and re-checking it here and there to facilitate discovery.

Imagine if you checked slack on a bad chain and made the adjustment based on a loose spot. You'd have a tight chain setting and not know it.

I have personally had noise from my non-sealed OEM chain and discovered it had tight and or loose areas. (And I know my lack of lubricating it didn't help.) The crazy thing is I was absolutely sure the sound was coming from the front of my bike before realizing it was caused by the OEM chain! I even swapped out my front brake pads to rule them out as the cause of the sound. I was so wrong but I could hear a faint rubbing when spinning the wheel and thought maybe it was contributing under speed. Swapped out the chain and my sound immediately disappeared.

A sealed chain is indeed more forgiving compared to the delicate fickle nature of the OEM non-sealed chain. My last 2 Groms I swapped the OEM chain out on day one before even putting a mile on them LoL

Edit: Also, lube that chain! At least it will keep the rust at bay.
All good advice.

Im 42 and have owned a motorcycle, no gaps, since I was 12. I was wrenching on bicycles before that. I do all of my own maintenance and modifications on all of my bikes. I'm a bit ADD so my stuff stays in top notch mechanical condition.

I still don't understand the not being able to admit if a tight chain was the issue. Sure, on the surface, it seems like an amateur mistake but, as you stated above there are alot of variables when it comes to tightening a chain. Be a human and help everyone else out and tell us what solved your problem.

I am still doubting the chain adjustment is the cause of this issue. (Sub par chains sourced by Honda more likely?!?!) My Grom's chain has been in spec since the first ride. This noise does not sound like a noise the chain could possibly make. (I could definitely be wrong here. Just my opinion.) Yellow22 said his grom still makes the noise with the chain out of spec loose.

Still waiting for an acceptable solution.
 

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There is a very specific noise that is corroborated by many people. I think generally, most people can read a little and determine if their noise is what I and others are hearing.

The chain could, in fact, be the issue. I do not believe the chain being properly adjusted is the issue at all. (Edit for wording)

Throwing water on the fire and trying to downplay the severity of the issue is helping no one.

The fact is, many of us, have bought a very expensive toy (made by Honda so we expect quality) and occasionally (more for others) that toy sounds like it is going to come apart while we are riding it!

The sound is not normal and it is signifying a serious issue.

Again, I encourage those who have this issue report it to Honda. If it gets enough visibility they will fix it.
 

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My Grom makes the sound whether the chain is tight, loose, whatever.

This weekend, I decided to go do some testing and videoed different things so I could show my dealer.

1. The sound occurs after 10-15 miles of WOT on the highway. It may take longer sometimes, but about 80% of the time, when I ride from my house into town (about 9-10 miles) it's doing it by the time I get to the first red light. It's a whining sound coming from the engine, maybe even the head area. That makes me think it could be the cam chain tensioner, but that's a guess.

2. As you hold the clutch in, coasting to a stop, that's when you notice it. As you gear down, the sound goes away immediately when you go into second. 3rd, 4th and 5th make the sound as you coast to a stop.

3. When you take back off, you'll be cruising in town now and the bike will sound okay again.

4. Go into 5th at about 35-40mph and before long, the whine comes back and it will be VERY loud this time. It comes on very suddenly. At this point, you can cruise along all day in 5th and it'll make that sound. This is how I was able to get it on video.

5. Go back down to second again and it'll stop it like you turned off a switch.

6. Go back into 3rd, 4th or 5th and the whine may come back again. Or it may not do it again until your next 10-15 mile WOT highway run to the next town.

I've gotten to where I can almost make the bike do it. But, as I said earlier, it requires actually riding the bike for a while and most dealers won't do that.
I am 99% certain we are talking about the same noise.

You said, "As you hold the clutch in, coasting to a stop, that's when you notice it." I want to point out that when mine makes the noise you can hold the clutch in and rev the bike and the noise does not change. The noise is not dependent on the speed of the motor. The noise is dependent on the speed of the rear wheel and transmission on the wheel side of the clutch. (Edit: this is why I do believe the problem could actually be with the chain. Again, I do not agree that chain tightness was ever the issue.)

I state the above to say, if the above is correct, the cam chain tensioner cannot be the issue. Neither could the head of the motor. Were it anything to do with the motor itself (not including downstream of the clutch) the noise would change based on the speed of the motor (revving it) not the speed of the grom.
 

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I have a friendly Honda store nearby. I was talking to the service manager about this today and he said he hasn’t heard of this. I think most people that bought one aren’t serious riders and the majority of these Groms are sitting in garages with low miles. I’m thinking about purchasing the 5 year extension warranty. Mine expires next month. It would buy me piece of mind. I shouldn’t have to but I do like the bike enough to keep it and I can cancel it anytime and get a prorated refund if the issue is ever identified and an easy fix. This wasn’t what I expected when I bought a Honda.
I would expect if you report this problem within your warranty period, and they do come out with a fix, you will be covered. Chances are they will probably fix it if your bike is out of warranty and you had not reported it.

IMO those extended warranties aren't worth the paper they are written on. That's why the dealerships push them so hard on new sales. It's all profit for them.

If you have not had the noise, just drive the piss out of it, don't worry and be happy. No need in worrying about a problem your bike doesn't have.

If you have had the noise report it. Either to Honda NA (or where you live), or take it to the dealer.
 

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Final word on mine and it's not good.

Dealer looked at the "countershaft and 32-tooth gear." Bearings went bad and my motor got hot enough that Honda has instructed them to replace all gaskets and the piston rings.

All parts are on backorder, of course. So who knows when I'll get my half-rebuilt bike back.

Not too happy with Honda right now.

😱😱😱😱😱😱😱😱

If this issue is melting motors... uhhhhh.... I just don't know what to say...
 

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Dealer says in addition to rings, the countershaft, bearings and gears are being replaced. "Anything that got hot and discolored." So who knows what all else.

I asked if they could just get me a new motor from Honda. Nope.

I don't know about yall but I'm in Arkansas and I've seen a lot of four wheeler engines get rebuilt by dealerships because someone swamped them in a mud hole.

I've never seen ONE of those engines go on to be anything but a mosquito fogger after a couple months.
This will 100% depend on how good the mechanic is that puts your motor back together. I would need to disassemble and re assemble the motor myself with lots of photos afterward. Just in case the mechanic fucked something up. (They always do) I would use a torque wrench on nearly every bolt during re-assembly. You will be lucky if a torque wrench touches your bike. I would give Honda hell for this.

Barring not getting a new motor, or your being able to pull it apart afterwards and see that nothing is fucked up, I would sell it. Sorry to put it that way but...

I have a very low opinion of dealerships. I never let anybody touch my shit. Honda does a recall, and it inside the motor, they are not seeing my bike. I'll do the work myself. If I have to. Out of my own pocket. Depending on cost...

YMMV

I am likely on the extreme end of things here but just my 2 cents. Don't put too much stock in a single opinion.
 

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Sold my 2022 Grom. The 5 speed didn’t work out for me. I lost faith in the quality due to the noise issue in the upper gears. I was without a Grom for a few days but scored a 2020 Grom today with 600 miles on the od and a Corbin seat. Looking forward to doing some long rides.
Sorry you lost confidence and ended up selling your bike. I am happy to hear you picked it another grom! Keep on riding!!

I am sure Honda will take care of this eventually. I'm just gonna keep riding mine. I just rolled 1,800 miles and she runs like a champ. I have not heard the noise again since I last reported.

I hit 82mph the other day banging off the rev limiter in 5th. I was doing the squealing then!!!
 
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