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Discussion Starter · #21 · (Edited)
News today. At the crossover to the 1000 mile mark I looked down and was doing an indicated 69 mph, tucked, on a level road.

I was three pickup truck lengths behind a pickup truck. Not just 69mph for a flash second blip on the instrument panel, but at least for 20 seconds before I sat up and let off. Rpm's were maxed close to or maybe on redline, not sure.

Technically I guess I was drafting. But I thought I had to be a lot closer than that to draft?

Regardless, it had me smiling. I am not accustomed to such speed on the only other stock Grom I've ridden, my original 14.

It had to be a draft assist right? (Edit: I'm going to go with it had to be as I've not been able to replicate that speed tucked on an empty flat road.)

There is no wind here today.

The bike remains stock save for an integrated tail light and rear fender delete.
 

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Discussion Starter · #22 ·
What happens when you redline? I've never wound rpms to redline before, on any bike. Does it just cut power and you slow? Then does it give you power back after it falls below redline, rinse and repeat?

Is that what a rev limiter is? Does every Honda have a rev limiter or is that something people add to modified bikes?
 

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News today. At the crossover to the 1000 mile mark I looked down and was doing an indicated 69 mph, tucked, on a level road.

I was three pickup truck lengths behind a pickup truck. Not just 69mph for a flash second blip on the instrument panel, but at least for 20 seconds before I sat up and let off. Rpm's were maxed close to or maybe on redline, not sure.

Technically I guess I was drafting. But I thought I had to be a lot closer than that to draft?

Regardless, it had me smiling. I am not accustomed to such speed on the only other stock Grom I've ridden, my original 14.

It had to be a draft assist right? (Edit: I'm going to go with it had to be as I've not been able to replicate that speed tucked on an empty flat road.)

There is no wind here today.

The bike remains stock save for an integrated tail light and rear fender delete.
I would say the pickup truck was helping your speed out, especially since you have been unable to replicate that speed. I’m also convinced that the 38t rear sprocket is helping tremendously too. The two previous Grom generations were way over geared. When I installed a 36t rear sprocket on my 2018, not only did the bike accelerate faster, but it actually gained top speed. I’m trying a 37t or 38t next.
What happens when you redline? I've never wound rpms to redline before, on any bike. Does it just cut power and you slow? Then does it give you power back after it falls below redline, rinse and repeat?

Is that what a rev limiter is? Does every Honda have a rev limiter or is that something people add to modified bikes?
My rev limiter has been raised to 10,000rpms. I hit the rev limiter on nearly every shift…lol! Yes, it does exactly what you describe. Some guys raise theirs to 12,000rpms, up from the stock 9250rpms limit.

I believe every Grom has a rev limiter. Not sure about Honda’s other offerings, especially historically speaking. I’d guess all of their modern bikes have one.

While I feel like I lost almost nothing on bottom end or mid range after installing my Yoshimura ST-2M camshaft, that cam really starts to scream above 9000rpms. If I’m not riding it at WOT, then I’m not riding it correctly, in my opinion…lol.
 
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Discussion Starter · #24 ·
I would say the pickup truck was helping your speed out, especially since you have been unable to replicate that speed. I’m also convinced that the 38t rear sprocket is helping tremendously too. The two previous Grom generations were way over geared. When I installed a 36t rear sprocket on my 2018, not only did the bike accelerate faster, but it actually gained top speed. I’m trying a 37t or 38t next.

My rev limiter has been raised to 10,000rpms. I hit the rev limiter on nearly every shift…lol! Yes, it does exactly what you describe. Some guys raise theirs to 12,000rpms, up from the stock 9250rpms limit.

I believe every Grom has a rev limiter. Not sure about Honda’s other offerings, especially historically speaking. I’d guess all of their modern bikes have one.

While I feel like I lost almost nothing on bottom end or mid range after installing my Yoshimura ST-2M camshaft, that cam really starts to scream above 9000rpms. If I’m not riding it at WOT, then I’m not riding it correctly, in my opinion…lol.
Thanks for the informative reply. Sounds like you know just how to ride the Grom and get the most out of it. Your upgrades sound good.

Personally I don't need the bike to be faster where I ride. It has just enough speed to stay out of the way and entertain me. It helps that all the roads around me are speed limited and the one 55mph road I take to work is a 4 lane divided highway. So if I'm struggling to stay at 60 up a long incline cars can just pass me in the other lane if they wish.

The Grom is well suited for my needs.
 

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The 2022 seems like a great bike. Honda appears to have taken note of the upgrades so many people have been installing on the two previous generations and made them standard equipment now.
 
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Discussion Starter · #26 ·
The 2022 seems like a great bike. Honda appears to have taken note of the upgrades so many people have been installing on the two previous generations and made them standard equipment now.
I agree. I'm loving the seat especially.

Ok so big news. On my way home from work just now I tried to experience the rev limiter cut off function. I was unsuccessful, but not in a bad way.

So there I was... :rolleyes: Haha,
I'm doing 60 in the right lane and a box truck hauling ass is passing me in the left lane. I swing over behind and I feel the wind resistance immediately recede and the bike starts going faster. I'm balls out wot in fifth tucked and giggling. This time I stayed cognizant of the tach.

Holy shit I'm one little LCD block away from the redline. Holy shit I'm touching the beginning of the redline now, but not in it.

Holy shit I'm doing an indicated 73 MILES PER HOUR! ON A SLIGHT UPHILL INCLINE! YIPYKYA MF'S! HAHAHA!

Please forgive my excitement on this achievement as I've not dabbled in drafting on the original 14 model, or anything for that matter. I just didn't know. (Shakes head perplexed)

At this point the box truck is so far in front of me and continuing to pull away I just couldn't believe I was still going that fast on an unmodified stock Grom with a little over 1100 miles on it, albeit a 22.

But I never experienced a power shut down during this little jaunt. I was so close. Not that I want to do that on a regular basis, but I did do it. Anyway, I was excited and wanted to share as I rarely behave like a maniac on the road this way.

I'm not one to modify Honda's engines as I'm more into their reputation for reliability and longevity but for those that love doing it, I think as parts and kits become available for the people that have the third generation that like to tinker and modify, they're going to have a hell of a good time of it. ;)
 

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It has been a while since I’ve been into road cycling, I prefer to stay off the roads on a bicycle nowadays, but if I remember correctly, drafting was about a 30% reduction in drag. That is drafting behind another cyclist. You always know when you are close enough to the rider in front of you, because you can hear it.

On a bicycle this is only a couple of inches at most, off of their rear wheel. As soon as you get into that spot where you are getting the maximum reduction in drag, the air turbulence going over your ears mostly disappears. It gets much more quiet. You really come to appreciate the benefit of drafting on a bicycle, because you, yourself, are the motor. It is real easy for you to sense the reduction in effort required to move forward.

On a Grom, behind a box truck I’m betting the reduction in drag is more than 30%, and the sweet spot is huge by comparison to drafting another bicycle. Motorcycles typically are’t very aerodynamic. On a Grom with about 8hp at the rear wheel, catching a good draft can make a huge difference. Sometimes, when I’m on a 4 lane divided highway and will get behind several vehicles, you can definitely feel the your bike getting pulled along behind them.

You can easily hit the rev limiter in first, neutral, second, and third anytime you want.
 
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