If you know how to replace spark plugs you know how to do a compression test. (take spark plug out, put gauge in spark plug hole, crank the engine, see result)
Technically you’re supposed to add a little oil to the cylinder to assure proper ring seal and hold throttle wide open whilst cranking. But good on ya bud for the smart ass comment
Pretty much as I would expect as far as wear goes. Break in periods aren't important and engines are designed to be able to run at full throttle near the Rev limit in a desert for long periods of time without damage. Before you reuse that cylinder see if you can catch your finger nail on the scoring that was on it, if you can that's when you'll want to replace it.
@@Photogromer Good luck, the California to Florida trip videos are some of my favorite on youtube. If your up for it California to Alaska would be a great sequel haha.
Honestly the brake in period will affect peak power. Ultrababying it won't get you to peak power but just pinning the throttle from the start will end up doing stuff like contributing to an engine burning a little more oil. Modern engines are fairly resistant thankfully and it's the difference between burning 20ml of oil in 500miles and 100ml in the same. Its MUCH more relevant in larger motors in a higher state of tune.
Hi Eric, compression testing is super simple and testers are cheap. Check it out when you get time. If you opt to not change the piston the compression test would have given an indication of the old rings condition. Also, grab and feel the connecting rod, should be no play in any direction, just to make sure the bottom end/bearings is tight.
Will do thanks. I’m going to go ahead and replace the piston and jug to show how to do it but for sure I’ll test out that rod and maybe do a compression test once we get everything back together. Unless it’s something better to do after break in?
It's not good to be impacting on your bolts. Especially at the torque these are at it's just not nesesary. Best to use a socket wrench or torque wrench and set it back to spec.
Although the video is interesting from the standpoint that it shows just how durable the Grom is, it really doesn't do justice to the proper disassembly of an engine or even what to look for. A compression test (although probably not needed at the mileage you did) shows possible wear to valves and valve guides as well as the piston, piston rings, and cylinder. All gaskets and O-rings should be changed just for good measure. It's a real bugger to reassemble an engine only to end up with a leak that wasn't there in the first place. I would never ever break bolts with an impact driver like you use in the video, especially the first time an engine is taken apart as some assembly lines use the max torque on assembly and your method could end up with snapped off bolts. Best to break by hand then us a driver to speed things up. What would be a good follow up is to take a Grom clone and see how the wear compaired to the real deal.
I agree the dude really has no idea what he’s doing and the way he pronounces words like scorching instead of scoring and naming every little thing he find and pulls out of the engine a bushing really confirms he’s got no idea 😂
@@KidNamedKuddy I really wish some dark ops Honda engineers would cram the rebel 300 engine into a Grom. Increase the fuel tank a bit, it'll be a miniature rocket. Big engine to cram in that little thing but man it's power to weight ratio would be insane
Not required, I've cracked open this case too many times to count, if you use my method the gasket is fine and doesn't leak. By all means do what you're comfortable with though.
@@Photogromer not something I'd be comfortable with, on a grom its not so much of a worry I tend to deal with bigger and more powerful engines though so different rules with higher pressures and more stress..
Well yeah, my experience on this is based on Groms and not bigger motors, so I can't speak to the life of the gasket on those but on Groms it's perfectly fine if the gasket comes off in one piece.
Sounds like the kind of thing I'd use to keep the old one as a spare, not best practice, certainly not Workshop manual advised but potentially useful to know. Sounds like it would be worth marking the gasket if taking the bike in for a service as if you've worked it out scummy mechanics will be using it and charging people. For new. Thanks for adding that trick to my list Of things iv picked up. Even though I wouldn't advise it it's still useful and am. Sure il use it at somepoint.
Here I am looking up info on rebuilding my Wave 125i engine after 80,000km / 50,000 miles. The Grom has it's engine from that bike - that's why the Grom has drilled and tapped holes at the bottom ;) Those engines can do some serious distances if you take care of them.
Interesting but the teardown of the top end of one very low compression grom engine does not prove anything regarding break in..... Just follow the manufacturer recommendation on engine break in. They designed and built the engine. They probably know what's best for it....
@@Photogromer eh. Not really. You'd need multiple samples in a controlled environment and a quantifiable way to judge the results such as measuring wear with precision instruments, oil analysis etc in order to make an actual determination. That's why I say leave the decision to the manufacturer. They actually have the resources to perform such tests.
There was a time when Honda cared about reliability. My old accord has 175k Mike's and doesn't burn oil. I'm hearing guys buying brand new Honda cars and they burn oil by the 4-5th oil change and Grom riders by the second oil change they burn oil. This isn't okay and it's unacceptable to me. Honda needs to stop using the same soft buttery metal GM uses that causes their vehicles to both cost too much while under delivering in reliability unlike the past
Sad thing about the Grom is as soon as you upgrade it power wise it knocks down reliability and it's only built to last like 50k miles max if you really really take care of it. That's why I think it would be wild if they could cram the rebel 300 into it. That way I can go 75mph up a hill on the same small comical platform. I really love the groms size but I hate it's speed
@@well_as_an_expert_id_say I mean I just rebuilt the top and bottom end of my DL650 3 weeks ago at 120,000 miles but I guess you're right. I also rebuilt the top and bottom end of a CBR250R I bought with a bad engine in the Fall. How do I become more of a motor guy?
Well a cross country trip is a lot for a grom. Although it's weird to me it even burns oil after going across the country brand new just one time. Usually naturally aspirated Honda engines don't burn oil until they're old as sliced bread unless you skip oil changes
It’s comforting to know how much abuse the grom can take and remain reliable
kornteeth exactly
i guess I am kinda randomly asking but does anyone know a good website to watch newly released series online ?
@Lennox Hunter flixportal =)
@Jon Roland thanks, I went there and it seems to work =) I really appreciate it!
@Lennox Hunter Happy to help xD
can’t wait to get one of my own! it was great to go on this adventure with you
This is awesome! A picture is worth a thousand words, the video is priceless.
It's a grom. It's always gonna burn oil 😂 you just gotta catch it before it runs out
Damn dude. Pretty bulletproof
If you know how to replace spark plugs you know how to do a compression test.
(take spark plug out, put gauge in spark plug hole, crank the engine, see result)
I just got a kit from my old man for Christmas, going to give it a try soon. Thanks :)
Technically you’re supposed to add a little oil to the cylinder to assure proper ring seal and hold throttle wide open whilst cranking. But good on ya bud for the smart ass comment
Pretty much as I would expect as far as wear goes. Break in periods aren't important and engines are designed to be able to run at full throttle near the Rev limit in a desert for long periods of time without damage.
Before you reuse that cylinder see if you can catch your finger nail on the scoring that was on it, if you can that's when you'll want to replace it.
Going to go ahead and replace me on Thursday’s live stream just to be safe and will take another closer look at it. Thanks for the tip 🤘
@@Photogromer Good luck, the California to Florida trip videos are some of my favorite on youtube. If your up for it California to Alaska would be a great sequel haha.
ha thanks I don't see that happening anytime soon but there was another guy that did that and much more check him out on Instagram @gromwayround
Honestly the brake in period will affect peak power. Ultrababying it won't get you to peak power but just pinning the throttle from the start will end up doing stuff like contributing to an engine burning a little more oil.
Modern engines are fairly resistant thankfully and it's the difference between burning 20ml of oil in 500miles and 100ml in the same.
Its MUCH more relevant in larger motors in a higher state of tune.
Hi Eric, compression testing is super simple and testers are cheap. Check it out when you get time. If you opt to not change the piston the compression test would have given an indication of the old rings condition. Also, grab and feel the connecting rod, should be no play in any direction, just to make sure the bottom end/bearings is tight.
Will do thanks. I’m going to go ahead and replace the piston and jug to show how to do it but for sure I’ll test out that rod and maybe do a compression test once we get everything back together. Unless it’s something better to do after break in?
That’s just nuts riding a Grom across country. That had to hurt.
Gotta love Honda reliability!
It's not good to be impacting on your bolts. Especially at the torque these are at it's just not nesesary. Best to use a socket wrench or torque wrench and set it back to spec.
Although the video is interesting from the standpoint that it shows just how durable the Grom is, it really doesn't do justice to the proper disassembly of an engine or even what to look for. A compression test (although probably not needed at the mileage you did) shows possible wear to valves and valve guides as well as the piston, piston rings, and cylinder. All gaskets and O-rings should be changed just for good measure. It's a real bugger to reassemble an engine only to end up with a leak that wasn't there in the first place. I would never ever break bolts with an impact driver like you use in the video, especially the first time an engine is taken apart as some assembly lines use the max torque on assembly and your method could end up with snapped off bolts. Best to break by hand then us a driver to speed things up. What would be a good follow up is to take a Grom clone and see how the wear compaired to the real deal.
I agree the dude really has no idea what he’s doing and the way he pronounces words like scorching instead of scoring and naming every little thing he find and pulls out of the engine a bushing really confirms he’s got no idea 😂
Jesus Christ im approaching 11,000 full stock and still running strong. Texas heat by the way. Just stay on top of your oil changes
sanity11795 I’m past 22,000 this week on my z125. Running fine still. Different bike, yeah but ya know
@@KidNamedKuddy I really wish some dark ops Honda engineers would cram the rebel 300 engine into a Grom. Increase the fuel tank a bit, it'll be a miniature rocket. Big engine to cram in that little thing but man it's power to weight ratio would be insane
Super les gars pour les vidéos, grâce a vous je me suis acheté une 125 msx , un grand bravo pour ta chaîne 👍👍👍👍👍
I been trying to get a grom
I had one already I worked and got it in like 5 months
Here I am worried about my 2T Zuma hitting 7K miles.
Any advice my grom has 2,500 miles on it. Seems to be burning oil after I ride it all day 200 miles or so. Mind u oil was dirty?
Shouldn't be burning any oil with that few miles on it
You should really replace that gasket every oil change dude
Not required, I've cracked open this case too many times to count, if you use my method the gasket is fine and doesn't leak. By all means do what you're comfortable with though.
@@Photogromer not something I'd be comfortable with, on a grom its not so much of a worry I tend to deal with bigger and more powerful engines though so different rules with higher pressures and more stress..
Well yeah, my experience on this is based on Groms and not bigger motors, so I can't speak to the life of the gasket on those but on Groms it's perfectly fine if the gasket comes off in one piece.
Sounds like the kind of thing I'd use to keep the old one as a spare, not best practice, certainly not Workshop manual advised but potentially useful to know. Sounds like it would be worth marking the gasket if taking the bike in for a service as if you've worked it out scummy mechanics will be using it and charging people. For new.
Thanks for adding that trick to my list Of things iv picked up. Even though I wouldn't advise it it's still useful and am. Sure il use it at somepoint.
Just watch Ed March's videos if you're wondering about Honda small engine reliability..
For what guys are using these little bikes for, Honda should really upgrade the Grom to 200cc imo.
As soon as I heard he wasn't doing a comp test I knew this whole video was pointless.
상당히 유익한 정보네요.역시 기술의 혼다.
Here I am looking up info on rebuilding my Wave 125i engine after 80,000km / 50,000 miles.
The Grom has it's engine from that bike - that's why the Grom has drilled and tapped holes at the bottom ;)
Those engines can do some serious distances if you take care of them.
#gromlife!!!!
Purdy entertaining…
Scorching ??? You mean scoring
Interesting but the teardown of the top end of one very low compression grom engine does not prove anything regarding break in.....
Just follow the manufacturer recommendation on engine break in. They designed and built the engine. They probably know what's best for it....
Do RC it does for the grom
@@Photogromer eh. Not really. You'd need multiple samples in a controlled environment and a quantifiable way to judge the results such as measuring wear with precision instruments, oil analysis etc in order to make an actual determination.
That's why I say leave the decision to the manufacturer. They actually have the resources to perform such tests.
lol ok
If it doesn't burn oil it's not a Honda
There was a time when Honda cared about reliability. My old accord has 175k Mike's and doesn't burn oil. I'm hearing guys buying brand new Honda cars and they burn oil by the 4-5th oil change and Grom riders by the second oil change they burn oil. This isn't okay and it's unacceptable to me. Honda needs to stop using the same soft buttery metal GM uses that causes their vehicles to both cost too much while under delivering in reliability unlike the past
Stupid dog barking noise every minute gets annoying...
Number one
It won't. Be a ram air! 😂
Big bore it since its apart
Nah did that last year. This one is staying stock 125 for reliability and wheelies.
Sad thing about the Grom is as soon as you upgrade it power wise it knocks down reliability and it's only built to last like 50k miles max if you really really take care of it. That's why I think it would be wild if they could cram the rebel 300 into it. That way I can go 75mph up a hill on the same small comical platform. I really love the groms size but I hate it's speed
First
I'm confused. Why is a super low mileage engine being torn down in the first place? I guess just for UA-cam content....
He took a brand new grom across the country. Quite the feat for a 125cc. Many of us are curious as to how it held up and what the inside looks like.
Not much of a motor guy huh
@@well_as_an_expert_id_say I mean I just rebuilt the top and bottom end of my DL650 3 weeks ago at 120,000 miles but I guess you're right. I also rebuilt the top and bottom end of a CBR250R I bought with a bad engine in the Fall. How do I become more of a motor guy?
Well a cross country trip is a lot for a grom. Although it's weird to me it even burns oil after going across the country brand new just one time. Usually naturally aspirated Honda engines don't burn oil until they're old as sliced bread unless you skip oil changes
First