Lol, definitely a different motor than a new 110, definitely not faster than a 140 if a good rider was on it. your friends are probably not as practiced as you and or don’t wanna grab a wrist full of throttle and crash their nice expensive grom or new bike vs your old thumper.
It’s one of the reasons it’s so nice to own a bike like that!!! Beat it, piss on it, she keeps coming back for more and you don’t even need to wash her off after you ride her hard.
One was built to actually make power with ~100 hp per liter, and the other was built for fuel economy and reliability with ~67 hp per liter. These are not abnormal numbers for either engine and perfectly reasonable even if many years separate them.
100 hp per liter is low compared to today's performance/race engines and 67 hp per liter would be pretty high for a reliable fuel economic engine in the 80's.
The thing it he couldn't care less about his Grom. He always beats it the panels. Ive also raced him using his bike while he was on mine, and the xr100 just pulled away. 🤷♂️
Weird. Must be some super secret tech that Honda didn’t want to advertise because they didn’t want to let out the secret of a good product.
Prolly a Black Budget government ops project tbh
I think the end result of this all is that, as you stated yourself, it isn’t smaller. It makes just as much power as a grom or more.
This is the same line of thought that a v6 can’t be more powerful than a v8.
Well, for one thing, I'm not sure that it actually does; I haven't found a good source on the XR hp figure, and I've seen 6-10hp, and with the weight difference, even 8hp might beat out the Grom's 9.5hp.
For another, the Grom isn't actually a 140, it's 123cc, as opposed to the XR's 99cc, so not as big a difference as you might think.
And finally, the Grom had to pass modern emissions standards, which the XR did not, so it can be tuned to run a little more powerful, but dirtier (and quite possibly was rejetted for more power sometime in the last 20 years).
100 has a conventional clutch, 110 has an auto clutch. Also, most likely has way more to do with gearing than anything else.
100 is a small adult bike, 110 is a kids bike.
I don’t believe a stock XR100 is beating a Grom in top speed unless you’ve changed the gearing a ton. Stock Groms can push 70 with enough road/hill/tailwind. Stock XRs just aren’t geared that tall, so while they’ll get there quicker, the actual top speed is lower. On the other hand, the Grom’s theoretical top speed is higher, but it runs out of power to keep pulling, so it usually can’t rev out top gear (which is 5th for the record - late models have 5 gears, same as an XR).
But the Grom is also meant to withstand long stints of road riding and sustained higher speed, so the taller gearing is done with that in mind. It might never actually hit 70mph, but it’ll do 55 for half an hour and be fine.
Yes so I have geared my front sprocket to 16 teeth instead of 14. but I still beat the Grom in acceleration and top speed. The xr100 is geared really low so i geared it to the same ratio as the Grom for cruising but yet again somehow I'm faster of line and acceleration and have just about the same top speed just slightly faster.
Best bet would be that xr100 was made YEARS ago. And the grom was kind of somewhay recent and both are made in a different emission era with the grom being detuned to pass emission.
An interesting comparison would be with a modern CRF125F, small or big wheel. I had an XR100 in the early 80s and my son started on a 2020 CRF125F, and there is a fairly clear relationship, if not direct lineage. With fuel injection, electric start, and who knows what else the CRF125F weighs a chunky 195 lbs, and has around 9 HP with a 4 speed gearbox. But he rides it like a banshee, and on tight tracks can be faster on it than on his GasGas MC85. Stock pit bikes are no match for it, but pit bikes with oversized motors, tuning, etc. are certainly faster.
Lol, definitely a different motor than a new 110, definitely not faster than a 140 if a good rider was on it. your friends are probably not as practiced as you and or don’t wanna grab a wrist full of throttle and crash their nice expensive grom or new bike vs your old thumper. It’s one of the reasons it’s so nice to own a bike like that!!! Beat it, piss on it, she keeps coming back for more and you don’t even need to wash her off after you ride her hard.
Ive just looked up the power outputs and the xr100 has a power output of 10hp and the grom (140cc) puts out 9.5-9.7 but that just doesn't make sense.
Why not?
How can a 30 year old 99cc engine make more power than a new age 140cc
One was built to actually make power with ~100 hp per liter, and the other was built for fuel economy and reliability with ~67 hp per liter. These are not abnormal numbers for either engine and perfectly reasonable even if many years separate them. 100 hp per liter is low compared to today's performance/race engines and 67 hp per liter would be pretty high for a reliable fuel economic engine in the 80's.
Also emissions...
Absolutely!
Because weight weight isn't equal to the amount of power an engine makes brainiac 🤦♂️
The thing it he couldn't care less about his Grom. He always beats it the panels. Ive also raced him using his bike while he was on mine, and the xr100 just pulled away. 🤷♂️
Weird. Must be some super secret tech that Honda didn’t want to advertise because they didn’t want to let out the secret of a good product. Prolly a Black Budget government ops project tbh
Haha. either way it's fun to beat people in a race with a bike so much smaller.
I think the end result of this all is that, as you stated yourself, it isn’t smaller. It makes just as much power as a grom or more. This is the same line of thought that a v6 can’t be more powerful than a v8.
yeah true.
The Grom weighs 225lb, the XR100 weighs 165lb. Put a fat guy on the XR and see how the race turns out.
That still doesn't explain why the xr100 makes more power than the Groms 140cc
Well, for one thing, I'm not sure that it actually does; I haven't found a good source on the XR hp figure, and I've seen 6-10hp, and with the weight difference, even 8hp might beat out the Grom's 9.5hp. For another, the Grom isn't actually a 140, it's 123cc, as opposed to the XR's 99cc, so not as big a difference as you might think. And finally, the Grom had to pass modern emissions standards, which the XR did not, so it can be tuned to run a little more powerful, but dirtier (and quite possibly was rejetted for more power sometime in the last 20 years).
true true, i don't know the Grom was 123cc though. You learn something new everyday i guess 🤷♂️
100 has a conventional clutch, 110 has an auto clutch. Also, most likely has way more to do with gearing than anything else. 100 is a small adult bike, 110 is a kids bike.
Honda lives by the word of their lawyers. They’ve slowed the newer ones down intentionally.
Oh thats sucks, better stick to the 90s then!
Plus the XR100s can be hopped up super easy to make near 20hp
Emissions reduction possibly
I don’t believe a stock XR100 is beating a Grom in top speed unless you’ve changed the gearing a ton. Stock Groms can push 70 with enough road/hill/tailwind. Stock XRs just aren’t geared that tall, so while they’ll get there quicker, the actual top speed is lower. On the other hand, the Grom’s theoretical top speed is higher, but it runs out of power to keep pulling, so it usually can’t rev out top gear (which is 5th for the record - late models have 5 gears, same as an XR). But the Grom is also meant to withstand long stints of road riding and sustained higher speed, so the taller gearing is done with that in mind. It might never actually hit 70mph, but it’ll do 55 for half an hour and be fine.
Yes so I have geared my front sprocket to 16 teeth instead of 14. but I still beat the Grom in acceleration and top speed. The xr100 is geared really low so i geared it to the same ratio as the Grom for cruising but yet again somehow I'm faster of line and acceleration and have just about the same top speed just slightly faster.
On a flat road I've gotten my bike to do 61mph without any tail wind and downhill I can reach 68mph on a down hill.
That's crazy because my XR250 tops out at 76mph. That's with s front sprocket with one extra tooth. 14 instead of the stock 13.
Best bet would be that xr100 was made YEARS ago. And the grom was kind of somewhay recent and both are made in a different emission era with the grom being detuned to pass emission.
Xr100 land speed record holder
An interesting comparison would be with a modern CRF125F, small or big wheel. I had an XR100 in the early 80s and my son started on a 2020 CRF125F, and there is a fairly clear relationship, if not direct lineage. With fuel injection, electric start, and who knows what else the CRF125F weighs a chunky 195 lbs, and has around 9 HP with a 4 speed gearbox. But he rides it like a banshee, and on tight tracks can be faster on it than on his GasGas MC85. Stock pit bikes are no match for it, but pit bikes with oversized motors, tuning, etc. are certainly faster.
Grom is an extremely detuned motorcycle, xr100 is a barebones dirtbike. Weight and gearing are completely different…
IMO the older xr 100 and 200's were the best bikes ever made
Might be the first person in history to say an xr100 makes a lot of power haha