Fastest Grom Top Speed
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Discussion Starter · #1 ·
Made me Laugh figured Id share, What do you guys think?
IMO He is full of shit is the only way he would weigh 210Lbs...
Defeinitely not going to do 68mph up Freeway ramp at that weight on Stock Gearing...
Only reason his speedo reads what it reads is because of 14tooth gear change = is why he even had pull up ramp, he is not a 210lb Rider, the only reason he hit 4th gear rev-limit lower tooth sprocket in front with the help of the downside on that overpass.
Plus Never Read on this forum anyways that your grom needs 2,000miles to break in WTF?
Anyways thought you guys might have a Laugh, I couldnt help but call him out on his bullshit...
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legit top speed on mine is also 73.. then it bounces off the limiter. ya mine rolls on the flat at 60-63mph no wind either direction maybe a little faster if i tuck, i never tuck. i got a 40lb backpack on. i weigh around 145lb give or take. i went back to stock gearing the guy who had it before me had it set up for easy wheelies but 1st gear was like 2 seconds if that. so was more annoying driving it regular. but im sure it was same top speed. but ya if you have even a small downhill it might be able to get to top speed if you have long enough straight. the grom likes to get to top speed slowly even on a big downhill. but ya you only get a easy 73 if its a sleight downhill. if its a slight uphill that will change. but if you notice he also tucked the full time. so maybe i can do faster on flats but im not gonna ride it everywhere tucked. 60mph in city is perfect. cops dont pull me over and most cars i pull from. but the 3 big hills i have in my city i can only go 50 usually a little slower bouncing from 45-50 as i jump from 3rd and 4th gear back and forth.
any new motor needs to be broke in.. for longest life. and to be broke in the right way.. going through gears through low and high rpms. usually for a few tanks of gas and running a little richer then optimum performance.. after that then the motor is broken in and you can wot all day everyday.
the grom probably cant blow up on break in unless you lean it out.. its a small cc with little power... but i still wouldnt wot it only brand new without running the engine back and forth through the rpms and gears and avoiding wot at max speed only right away. though its probably set rich from facotry.
but when i raced 1/8th gas rc cars back in the old days. ive seen many people blow up their brand new 600$ rc car motor from not breaking in the motor and trying to race it out the box super lean. most the time though you can just replace the piston and sleeve in those little motors and break it in right and should be fine. though ive seen others screw thier piston, sleeves, and cranks first day of using their new motor. but those motor are single piston with a carb with dual adjustments. one for low end speed and one for high end.. so you could really out the box be running your motor 2-10sx hotter then it should be. depending how you set it. though the performance would be shit and then ya you get fucked up motor. im sure the groms run rich from the factory. so ya when we would break in rc motors you would run them rich for first few tanks of gas. then you could get it at optimum performance or even a little lean to race them after the break in and not worry so much about damaging the piston and sleeve. im sure those engines were designed with the sleeves specifically for the reason people would break them from not knowing how to break in a motor legit style. and when i say break all it does by running it too hot brand new is create the piston and sleeve to not mesh at optimal so then you lose performance.. because it will warp it some and then there will be gaps and or scratches that screw up the performance when it fires..
its funny i think the carb though on my rc car is probably harder to adjust then the chinese carb bikes, but its easy.. so i dont really get why people dont like carbs.. its easy to adjust and whats nice also about carb only is you can set your bike to run at optimum performance everytime you ride it after you warm it up.. no matter the weather that day ect. also you dont have to buy a damn computer to make the bike actually perform at its max.. i hate fi but whatever.
the bad thing on youtube you have a lot saying it doesnt matter how you break a engine in ect.. but then i dont think they even know what rich and lean means.. because if they did they would know better.
but if bikes and cars are coming running rich from the factory then they are somewhat right.. you can do a so called "hard break in" something i never heard about till youtube.. as long as you dont lean it out and then think you will get away with that "hard break in"
im sure this is what hes talking about, about max speed out the box. but most dont know what the hell they are talking about but just heard this or that ect.. only reason i know is because ive hung out at the race track though just rc cars mainly and seen what breaking in a motor wrong can do.
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Discussion Starter · #3 · (Edited)
legit top speed on mine is also 73.. then it bounces off the limiter. ya mine rolls on the flat at 60-63mph no wind either direction maybe a little faster if i tuck, i never tuck. i got a 40lb backpack on. i weigh around 145lb give or take. but ya if you have even a small downhill it might be able to get to top speed if you have long enough straight. the grom likes to get to top speed slowly even on a big downhill. but ya you only get a easy 73 if its a sleight downhill. if its a slight uphill that will change. but if you notice he also tucked the full time. so maybe i can do faster on flats but im not gonna ride it everywhere tucked.
any new motor needs to be broke in.. for longest life. and to be broke in the right way.
I Dont dis-agree a stock grom with less than 500miles on a long FLAT straight can hit 73mph... This is Very do able but most likely if you weigh less than 160lbs
I weigh 170lbs w/gear my grom on a 12mile stretch of Hwy(98) would barely hit 71mph full tuck Stock Gears w/Intake, Exhaust & PCV... (Only 3upgrades)
tucking Nets me anywhere from 5/13mph depending on Wind
No Fucking way This Guy at 210lbs on incline 67/68 and with in a few secs at 73 hitting fucking Rev-limit w/stock gearing... Not without a Decline and or Gear Change of sort, Is my Argument. That Sportbike he passed does that mean a Stock grom can outrun a Sportbike? Lol
I dont give a shit about Break In debate, if he thinks a grom or any motor for that matter doesnt perform better with mileage and break in, Then no wonder he is on his 4th grom
Thanks for post reply Jeremiah Ride Safe :blackgrom:
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my first grom did real 70mph stock when I diet down to 190 lbs a while back in late 2014 early 2015 time frame. This is the grom which I rode it like I stole it and round 1,500 miles break in it had a steady 65mph and hit 70mph around 2K break in. There should be some old posting on here with me talking about it. My second grom which I broke in correctly could not break in 65mph even after 1,500 miles on the ODM.
I say change out the clutch side cover and remove the oil spinner, add the speed spacers, air box mod, open up the exhaust system and even a little porting on the inlet tube to 26-27mm including the spacer plastic and port matching the I/D to the intake of the head and also porting out the exhaust port of the head and 70mph all day might be possible.
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i think it also depends. i have no idea what temp im running my grom at or around.. but say i checked it.. say i notice its actually running cooler then optimum. if i lean it out then why cant i get more out of it. but not just that he could be running it super lean.. he has cash maybe.. he dont care if he run it hot and at max. idk truthfully. but if its a sleight downhill you might not notice it on camera but the grom notices it a lot. and ive hit max speed on small incline streets if i record it might look like im on flats and you might think hey hows he going 73 on flats and bouncing the revs.. but its really downhill. i thought max weight for grom is around 350lb so 200 is still on the light side for riding it.
if you ride a bicycle on a street it will truly tell you if its downhill or uphill even slightly.. so from my house to the corner store is like 4 blocks looks flat. when i ride there on a bicycle i actually have to pedal there on way back i can coast mainly.. but it looks flat..so on grom coming back i can go faster. wind play a big part also. if you got wind at your back you can even roll at 60 up the same hill on other way you could only go around 45-50
but ya also trolls on internet so i think he used downhill and wind and say thats normal riding for him on flats. maybe but i think he just wanted to show it max speed and say you can do it out the box.. which i never heard anyone say you cant. lol
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So do i have some sort of special grom if i've had 77mph indicated on stock gearing?? (downhill and i weigh around 190lbs)
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Discussion Starter · #7 ·
So do i have some sort of special grom if i've had 77mph indicated on stock gearing?? (downhill and i weigh around 190lbs)
Yessss You have very special grom... :nerd: lmao
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well.. the revlimiter kicks in at 73-74 mph so you'd have to have the clutch pulled in and rolling down hill. did that in the mts on mine when it was stock.
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I break all my bikes in like this... I raced motocross professionally for many years, times where it was necessary to put a new piston and ring in the bike between motos, there was no option for "break in" other than starting it for the first time letting it run to temp on the stand, then a few blips of the throttle to ensure it was all good. Never did I ever have any issues with rings not seating, cylinder scoring etc unless I had a failure of another sort (example, dirt getting past filter). But anyhow all of my bikes which have been to many to count I always ride them for a very short time just checking for the obvious signs of malfunctions, then it's on... ride it like I stole it. Then it's maintain with proper maintenance, oil changes etc. I've yet to have a failure with this method. Anyhow.. back to the speed of that grom..
I was around 210 when I got the grom back in 2015. Only on down hills (long ones) could I ever get the thing to hit the rev limiter, I forget exactly what my top speed was, but it was certainly around 70. with very little head winds. I did notice someplace around 800ish miles that the bike did become a "bit" better because initially I believe I was topping out more regularly around 68 on the typical down hills in my area. Again, wind, hills, tail winds, etc all played into rolls of top speed. Going down 1 on the front tooth with stock setup was probably the only way I was realistically getting the thing to hit rev limiter, someplace along the way I completely forgot about top speeds, all I knew was my groms stock motor spend most of it's life at WOT... lol
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well.. the revlimiter kicks in at 73-74 mph so you'd have to have the clutch pulled in and rolling down hill. did that in the mts on mine when it was stock.
Nope, WOT, not touching the clutch lever and watched it climb up to 76 and then briefly flickered to 77 for maybe 5 seconds then back to 76 then i rolled off the throttle. I'll get it on the gopro and stick it up :crazy:
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I guess I'll be the outlier.....
Top speed when new (I weigh about 195#) = 54 MPH
Top speed after hard break-in (lots of oil changes along the way)= 54 MPH
Top speed after installing speed spacers = 55 MPH
Top speed after further additions, including: synthetic oil, Brisk spark plug, clutch-cover, air-box mod, Hindle exhaust, aRacer ECU = 55 MPH.
How can this guy be getting ~ 18 more MPH than me on a mostly-stock Grom?
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So do i have some sort of special grom if i've had 77mph indicated on stock gearing?? (downhill and i weigh around 190lbs)
What sort of engine-related mods have you done to your bike, if any?
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I guess I'll be the outlier.....
Top speed when new (I weigh about 195#) = 54 MPH
Top speed after hard break-in (lots of oil changes along the way)= 54 MPH
Top speed after installing speed spacers = 55 MPHTop speed after further additions, including: synthetic oil, Brisk spark plug, clutch-cover, air-box mod, Hindle exhaust, aRacer ECU = 55 MPH.
How can this guy be getting ~ 18 more MPH than me on a mostly-stock Grom?
Are you testing on flat ground? Or going all out on a downhill?
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Discussion Starter · #14 ·
Nope, WOT, not touching the clutch lever and watched it climb up to 76 and then briefly flickered to 77 for maybe 5 seconds then back to 76 then i rolled off the throttle. I'll get it on the gopro and stick it up :crazy:
Sorry Maz you are Disqualified LOL, you are not completely Stock. Im not doubting capability, Only calling bullshit on his supposely Stock Grom doing what he claims in Video... End of all doubt He had a chase vehicle Why not confirm Speed that way, lookin at his Stature he's not 210lbs unless he got fatass gut under that tuck but dont think so, Youtube ClickBait... All good but still post video love seeing Groms hauling ass above 73mph
I guess I'll be the outlier.....
Top speed when new (I weigh about 195#) = 54 MPH
Top speed after hard break-in (lots of oil changes along the way)= 54 MPH
Top speed after installing speed spacers = 55 MPHTop speed after further additions, including: synthetic oil, Brisk spark plug, clutch-cover, air-box mod, Hindle exhaust, aRacer ECU = 55 MPH.
How can this guy be getting ~ 18 more MPH than me on a mostly-stock Grom?
Thank You! Im sure WV will have same opinion
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Discussion Starter · #15 ·
So do i have some sort of special grom if i've had 77mph indicated on stock gearing?? (downhill and i weigh around 190lbs)
What sort of engine-related mods have you done to your bike, if any?
Last I read Maz has Exhaust and Airbox Mod, which is why he is Disqualified lol, The video claims Stock no Mods 210lb Rider and hits revlimit in 4th gear on slight incline to a straight with in secs.
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What sort of engine-related mods have you done to your bike, if any?
Only mods i have done that could make any difference to power output (if any) would be the standard airbox mod. i.e. turning the intake tube around to face the front of the bike and drilled holes in the panel and removed the metal mesh from the filter. Then i've changed the exhaust too for a Zoom loop low exit pipe.
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Hahaha sorry i missed the disqualified comments guys....but yeah as above those are my only performance mods. I'll be out on the grom tonight so i'll see if i can find my gopro when i get home after work and give it a charge
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yeah roughly 77mph with stock gearing is about correct. Using GPS with my BBK I showed 78, but i'm sure there's still margin for error even with that. and that was AT REV limit kicking in.
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no way with stock gearing and semi accurate speedometer. just wont work. lol. this shit kills me. :crushed:
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yeah roughly 77mph with stock gearing is about correct. Using GPS with my BBK I showed 78, but i'm sure there's still margin for error even with that. and that was AT REV limit kicking in.
You've got a new challenge now though, we're all waiting to hear what speed you can reach with that 250 motor in now :big smile:
Source: https://www.hondagrom.net/threads/youtube-video-motobros-honda-grom-top-speed-73-mph.39956/
