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My KRX is bucking and surging. Called dealer he has never heard of such thing. Ideas so check? Routinely serviced.
 

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2020 Green KRX
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I have experienced the same thing. Running at 5-6000ft elevation. It was surging and bucking. Happened Only once. I live at 2200 elevation and it runs perfect. Today I was again in 5-6000 ft elevation and it started surging. I plan on installing a new air filter tomorrow and see if that helps. I will be riding all weekend at this elevation. I have spoke to dealer on this. They have not come across this and have no idea as no codes are being set.
 

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Discussion Starter #3
I have experienced the same thing. Running at 5-6000ft elevation. It was surging and bucking. Happened Only once. I live at 2200 elevation and it runs perfect. Today I was again in 5-6000 ft elevation and it started surging. I plan on installing a new air filter tomorrow and see if that helps. I will be riding all weekend at this elevation. I have spoke to dealer on this. They have not come across this and have no idea as no codes are being set.
Thank you. I’m not getting codes either. In neutral on the throttle no motor trouble so has me thinking clutch but I’ll try anything. We live at 4500 but I have 5 others with no such issue. Let me know how you make out if you can. I feel like I’m in an information vacuum with it. I’ll let you know if I make any headway with it.
 

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My KRX is bucking and surging. Called dealer he has never heard of such thing. Ideas so check? Routinely serviced.
I’ve had that happen too, at low speeds. But I just throttled up and it smoothed out like it was no issue. Almost like if your driving too slow for the gear that your in, is how mine felt.
 

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I had what seems to be the same symptom happen yesterday on a ride.. at 4 to 5000ft elevation level ground, came to near stop at turn and had a low speed hesitation on acceleration or felt like it was running out of gas... but instantly cleared the second I throttled up more.. 3/4 tank of fuel.. With a 100 miles on machine and I had checked the air filter was clean before I left..
Like a ghost only happened once and was only for a moment... so tough to pin point, my best guess until it happens again would be because I was backing off and engine may not have returned to idle, barley rolling, clutch felt disengaged and I was back on about a 1/4 throttle...
Im leaning more toward a throttle by wire issue.. throttle position.. air temp sensor.. maybe Software .. tough one!
Lets face it IMHO Kawi went overboard on programming this krx to walk out of the hole.. it really could have a bit more snap to its throttle.
I wonder If this has happened to anyone that did a cat delete or reprogram?
 

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2020 white KRX 1000
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Mine done the same thing 3 times within 10 minutes during a 11hr ride last Saturday. Not sure what to think about that.
 

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2020 Kawasaki KRX
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I had what seems to be the same symptom happen yesterday on a ride.. at 4 to 5000ft elevation level ground, came to near stop at turn and had a low speed hesitation on acceleration or felt like it was running out of gas... but instantly cleared the second I throttled up more.. 3/4 tank of fuel.. With a 100 miles on machine and I had checked the air filter was clean before I left..
Like a ghost only happened once and was only for a moment... so tough to pin point, my best guess until it happens again would be because I was backing off and engine may not have returned to idle, barley rolling, clutch felt disengaged and I was back on about a 1/4 throttle...
Im leaning more toward a throttle by wire issue.. throttle position.. air temp sensor.. maybe Software .. tough one!
Lets face it IMHO Kawi went overboard on programming this krx to walk out of the hole.. it really could have a bit more snap to its throttle.
I wonder If this has happened to anyone that did a cat delete or reprogram?
Mine does that on a regular basis. Just slow riding, rock crawling speeds. Ease into the throttle and it just bogs momentarily, then it picks up and revs up. I'm used to it now and I don't notice it as much. If it ever decides to not rev, it will be trouble. It almost feels like you hit the low power switch. I wonder if there is any connection? I've never been below 5,300' with it, and most riding is 9,000+'. Don't know id it is elevation related or not.
 

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Mine does that on a regular basis. Just slow riding, rock crawling speeds. Ease into the throttle and it just bogs momentarily, then it picks up and revs up. I'm used to it now and I don't notice it as much. If it ever decides to not rev, it will be trouble. It almost feels like you hit the low power switch. I wonder if there is any connection? I've never been below 5,300' with it, and most riding is 9,000+'. Don't know id it is elevation related or not.
I thought the same.. like the low power switch is momentary shorting.. just doesn't seem like its a engine or fuel/ignition problem.. when time will try to locate a wire schematic and see how the low power switch wires in.. remove it and retry!
thoughts?
 

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I'm at high elevation like Bob. I run 89 octane and never have this problem.
Can any of you post a video of this happening?
 

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2020 Kawasaki KRX
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I'm at high elevation like Bob. I run 89 octane and never have this problem.
Can any of you post a video of this happening?
I know I have no video of it. I run 87 octane for the most part. Ran 91 octane ethanol free while up in Taylor Park. Makes no difference, it still does the same.
 

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2020 Green KRX
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I thought the same.. like the low power switch is momentary shorting.. just doesn't seem like its a engine or fuel/ignition problem.. when time will try to locate a wire schematic and see how the low power switch wires in.. remove it and retry!
thoughts?
Set it to low and unplug it. It’s a big green adapter in the back. If it runs fine then the switch is faulty.
 

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2020 Kawasaki KRX
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I thought the same.. like the low power switch is momentary shorting.. just doesn't seem like its a engine or fuel/ignition problem.. when time will try to locate a wire schematic and see how the low power switch wires in.. remove it and retry!
thoughts?
I really don't think that it's a short of any kind. It's too consistent and smooth every time. Feels to me more like maybe a mapping issue. It would be interesting to see if a reflash would fix it. I will have to talk to my dealer about doing that whenever my updated steering knuckles and lower a-arms show up.
 

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Mine has done it a couple time and I feel it's just that while casual cruising , at a low throttle, it's bouncing off the ignition idle circuit setting. Another 1/8" stab of throttle and it clears up.
 

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Well, I guess we all need to call Kawi and open a case for them to be motivated enough to look into this!
My dealer won't do anything unless they can duplicate it and that most likely won't happen in the shop..
 

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This just happened to me for the first time last night. Was climbing a big hill, let off gas for a rough part, hit gas again and nothing so I applied more and it finally took off. I was under a half tank of fuel so thought maybe that was the case but apparently not. I run 91 ethanol free.
 

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This just happened to me for the first time last night. Was climbing a big hill, let off gas for a rough part, hit gas again and nothing so I applied more and it finally took off. I was under a half tank of fuel so thought maybe that was the case but apparently not. I run 91 ethanol free.
Thinking about it that’s happened to me too. I didn’t think much of it. I hammered it and it cleared up. I don’t think it would be a mapping issue in my opinion. I think it would be more of a Throttle position sensor problem. I’m finally able to take mine to the dealer Saturday after waiting 3 months to get my machine in. I’ll make sure to bring this up.
 

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Just got back from a ride.....it happened again, multiple times and seems to be more isolated either going up hill or descending. Seems to be pretty decent on the flats.

Speedyg an updates from your dealer possibly?
 
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