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Hi guys,

Question, I have a ATAS 2018... When I ride agressive, I feel the gas don't get there regular... I feel the curve of power is not nice curve. I know magic start to happen at 4500 rpm. But after that, it does't go smooth the cure of acceleration.

Then, when I turn off the engine, and start back, it seam to go well for like 15 minutes, and restart to be not regular...
It is NOT the traction control... It is not the cut-off.... Is just it does't go smooth

Also, when I put the full throttle, I have the feeling the bike slow down, if I release a little bite, it accelerate more faster..

Any idea about that issue

Thank you for all your help.
 

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Hi guys,

Question, I have a ATAS 2018... When I ride agressive, I feel the gas don't get there regular... I feel the curve of power is not nice curve. I know magic start to happen at 4500 rpm. But after that, it does't go smooth the cure of acceleration.

Then, when I turn off the engine, and start back, it seam to go well for like 15 minutes, and restart to be not regular...
It is NOT the traction control... It is not the cut-off.... Is just it does't go smooth

Also, when I put the full throttle, I have the feeling the bike slow down, if I release a little bite, it accelerate more faster..

Any idea about that issue

Thank you for all your help.

No expert on fuel injection but the description you give makes feel your bike is running very lean. A trip to a dealer for peace of mind may be in order.


Pete.
 

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I think I am experiencing something similar. It looks like that if I grab the throttle aggresively there is a momentarily hesitation. Not big, but noticable. More like delaying to give full throttle for a sec or less.

It cannot be the Traction because I do not see the indication go lit.

I intent to do more testing on that.
 

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My first question would be what Riding Mode are you in? If you are in URBAN or GRAVEL, there's a definite noticeable lag. If my P setting is 3 it’s more pronounced, and with 2, a bit more subtle. (But I haven’t really done a lot of testing in P=2 mode).
But you mention a difference after riding for 15 minutes, so I'm guessing it’s not Power Mode related and you're either in TOUR Mode or USER with P=1.
At any rate, it doesn’t sound kosher. If anything, I have a bit of the opposite problem at lower speeds. I find the throttle to be hyper-sensitive down low, cruising around town in 2nd or 3rd requires careful throttle management, the smallest movements can trigger a herky-jerky ride, e.g., hit a bump that causes my throttle hand to jerk down a bit, and the bike might do a little jump forward.
But I can bang it without any noticeable issues in all gears. If I'm in 6th, doing say, 50mph, I can go full throttle and it flat out takes off with just a bit of an initial delay. If I'm in 4th or 5th at 50mph and bang it, almost no delay and all the power I could want.
And most importantly, I find the power curve up high to be smooth as silk on my bike. In 6th gear, riding at 60mph and banging the throttle, I’m doing 100mph in seconds. I haven’t timed it, but it’s going, going, gone with smooth continued acceleration all the way.
Good luck getting it sorted. Gary

Ps. I know it may seem obvious, but try another type/ brand of fuel? (I'm running regular unleaded 87).
 

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I have just noticed that you guys there run lower octane then our country which is 95 octane.. is 87 the highest you have?
 

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I have done some trials this morning. Still need to do some more but here are my observations so far:

1. Gravel Mode: of course the power delivery is significantly reduced in this mode, so there is no reason to test rapid accelerations. I ussually use this mode for easy riding and fuel economy. Subsequently I have not observed any issue with this mode.

2. Urban mode and Tour mode:

If I would go up to the rpm limiter with all gears, there seem to be no noticable issue. But, if I am traveling on 6th gear, at say 130kph and twist the throttle hard to accelerate, there seems to be a lag. It is much less noticable with URBAN mode, while more evident on TOUR mode.

Also, on TOUR mode, I noticed that, traveling with 130KpH and twisting the throttle steadily but neither all the way up at once, nor too slow, there are small (time-wise) power gaps during accelaration. And indeed it seem that easing a bit on the throttle, the power comes back. Feels like if the CPU cannot decide how much fuel to inject for some msecs.

Other than that, the bike runs absolutely perfectly. It does reach top speed easily (topped at 224kph on certain conditions: 5lt fuel in the tank, no top case, no wind, 23 deg Centigrade).

But, the question would be, can it make even better performance or the afformenioned behavior takes away some of its potential?


(please accept my apologies if my English are not good enough to explain my observations; it is not my native language).
 

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The octane number for gas in the US is an average of the two methods of calculating it (RON, or research octane number, and MON, motor octane number). Don't ask me what the difference is. One is lower than the other so the average is smaller. I believe the US may be the only place this is done that way. The highest octane generally available is between 91 and 93, and it may or may not be available everywhere.
 

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What Shadowjack said, Africano. Your 95, there in South Africa, might be the same as our 87, here in US. (There's a Wiki page on the subject).
Around here, in Virginia, the standard is: 87 (low)/ 89 (mid)/ 91-93 (high) depending on gas station. And you can occasionally find up to 95 in some places. And even more rare, there are one or two places you can find ethanol-free gasoline, but it's usually higher octane stuff too.
 

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Yep Im thinking this is a common experience with the 2018 ATAS, power is coming in waves almost holding back then full on,however keep the faith and give it a thrashing now and again and get some miles under your belt as I believe this will improve when the bike gets more run in as I believe mine has. My Idle is almost perfect and jerkiness has all but gone and plenty of power.....
 

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I don’t think I ever had that issue with my 2018 ATAS—any power curve issues.

And I just got back from a test run trying to see if I could duplicate the sort of thing Petros describes but couldn’t find any issues.

If I'm doing 80 mph (130kph) in 6th gear and bang it—full throttle—the power is nearly instantaneous, negligible lag (however, I slow as I reach 100mph—haven’t had the opportunity to take it much faster yet). As I wrote above, if I'm doing 50mph in 6th, there is a bit of a delay, but the power comes on in one continuously accelerating motion, faster, faster, gone.

And in 4th doing 40-45mph or 5th doing 50-55mph, it’s much the same—nearly immediate and smooth, ever faster.

However, having said as much, I agree with Harleywilma too: from about 650 miles on, the bike seems to have come into itself some, everything getting smoother (shifting, engine revving, idling, etc.) while at the same time becoming more responsive, and seemingly more powerful.

And idling in 1st gear around a parking lot is now nearly smooth as silk compared to what it was like with around 300 – 500 miles on the bike. (I'm now at around 750 miles on the bike). Idling in circles, no throttle, in 1st, is so very smooth, nearly perfect, zero lag or any of that slight back and forth I used to get. The rpm's seem to be nailed in place.

And my engine always idled pretty well while parked, but early on there was some slight variation and a few times where she nearly coughed a bit here and there. But that’s all gone now too.

750 miles isn’t a whole lot, I realize that, but it seems to be all my bike needed to get exercised into what seems like a premium state of health.
 

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Thanks for your input Harelywilma and Garyth.

My bike has now 4000 Km on the clock, and only recently I had those observations, mainly because I tend not to push the bike during the first 2-3K Km.

The last two days, I keep doing trials and I am pretty sure that what I observed happens only with TOUR mode and rather worsens with the ambient temperature rise. This morning, I could still feel it but much less than yesterday afternoon (some 12 deg Centigrade ambient temperature difference).

I would like to mention here that I contacted Jens Lyck from BoosterPlug, explaining the issue as better as I could and asking him if their product would resolve the issue. What a brilliant proffesionall! He responded immediately, stated that the boosterplug does not even work at the speeds I experience the issue and hence would do nothing to cure the problem; it's role is to smooth the low end. He also suggested to check the lambda sensor, which I will do.

Thumps up for professionals like Jens, who offer their help to stangers from throusands miles away!
 

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There are many things that could cause this problem though..
Also check your map sensor tube, tank breather tube all those pipes under the tank that it is not pinched for a visual..
Yes I agree the 02 sensor could also be a problem..
 

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Evening gentleman
I have exact same issues as the OP. Fitted booster plug and made no difference to the issue. Also hard finding someone who experienced same issue as me. Did you find out what was wrong?
 

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Hi,

since my last post on this, I had been doing tests to identify and rectify the problem.

eventually, in my case at least, it seems that the Traction setting plays a role. If I have for example mode Tour and TC=7 the phenomenon is obvious. If I turn off the TC it does not manifest.

Since there is no loss of traction in all cases of my testing, I guess that the system acts somewhat ... proactively? It does not make much of a sense, but anyway, those are by observations.
 

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Petros, very interesting... I nearly always keep my TC at 1 or 2. Maybe that's why I never felt this issue.


...
 
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Petros, very interesting... I nearly always keep my TC at 1 or 2. Maybe that's why I never felt this issue.


...

Maybe Gary! in my case, the test results had been so consistent that now it had become a habbit for me; if I want to drive aggresively, I do two things : switch to mode Tour and set TC to 1!
 

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I cannot confirm improvement with mileage, but I may have some insight.

I am at about 3200 miles since getting the bike in October and the throttle has always been twitchy and lurchy under 30mph. The symptoms are milder in gravel mode. The bike also has a moments hesitation when twisting the throttle and sometimes pauses, like it can't figure out if I really meant to give it a lot of juice. Also, if the bike has been sitting more than 12 hours then the bike needs to warm up for about 1-2 minutes as I've noticed it has burps in idle and makes a loud clicking noise until it idles for a moment. If I ride off during this time I have had the bike have little blips in the throttle or feel like the bike is accelerating when the throttle is closed (I miss the throttle free play of cable. I'm not crazy about ride by wire).

What I have learned is that the bike is tuned as lean as possible for emissions standards. My buddy has the most recent VFR 800 and has the exact same behavior. He hooked up a power commander and resolved the twitchy throttle and the erratic hard acceleration behavior. The side effect is he is getting 32-37mpg to our other VFR mates getting closer to 45-50.

I felt his bike pre and post ECU piggy. His sole purpose of installation was to smooth the throttle and it worked. It makes sense. We're seeing bikes struggle to maintain emissions standards all across the board and the Africa twin is a liter bike tuned to give control at slow speeds in sand and dirt. I am not sure how close to the money I am but this is my understanding so far.

I don't know if an ECU tune or a commander is in my future, but I do know that if I keep on my clutch like I've been to keep smooth control under 30 i am going to be replacing plates in no time. It's almost impossible to not knock my pillion around when I'm two up.

Sent from my moto g(6) using Tapatalk
 

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So, did anybody resolve this issue one way or another? It is getting hotter here and this odd behaviour came back with the heat, as it seems. All the winter I did not experienced that....

Has anybody installed PC or RapidBike EVO? if yes, please share your experiences. The bike is 2018 ATAS.
 

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Today I dynoed the bike in a effort to visually capture the behavior so that I could discuss it with Honda Hellas.

Well, we did not manage to force the manifestation of this momentarily hesitation, although we did try a number of times. The engine would rev up without any hesitation.

By the way, the bike made 88.11 HP on the rear wheel.

The mechanic (who is also a dragster driver and tuner), is confident that with a filter, a cat removal, an end can and a remap we can make the bike touch or exceed 100BHP.

It sounds tempting but I am against cat removal for environmental reasons. In any case, it would be of my interest to hear the experiences of people that have already done such mod.
 
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