nutterduck
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Registered: Jun 16, 2023 10:21:54 GMT -7
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Post by nutterduck on Jun 25, 2023 7:13:57 GMT -7
So Im still getting use to the bike and I've noticed that it kind of surges slightly (surge may be a bit strong of a word choice) while holding any speed, regardless of gear and rpm. So essentially, while holding a speed of 70, the bike will try to accelerate, realize that it shouldn't, stop and then try again. Leaving the rider with the faintest headbanging motion.
So the question is - Is that normal for MT's?
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Post by mt10orc on Jun 25, 2023 8:26:01 GMT -7
I don’t have that experience and haven’t felt that on my 2020. Can’t remember if it did that stock tho as have I have done the decat delete.
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nutterduck
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Post by nutterduck on Jun 25, 2023 9:38:09 GMT -7
I don’t have that experience and haven’t felt that on my 2020. Can’t remember if it did that stock tho as have I have done the decat delete. well thats a little unsettling.... |
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2wheeledprivilege
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Post by 2wheeledprivilege on Jun 25, 2023 12:27:23 GMT -7
I have a 23 with 564 miles on it and have not experienced anything like that. Is the chain out of adjustment?
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nutterduck
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Post by nutterduck on Jun 25, 2023 13:16:01 GMT -7
I have a 23 with 564 miles on it and have not experienced anything like that. Is the chain out of adjustment? Slack is within spec 20 - 25mm and no noticeable wear |
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Post by RedAndBlack on Jun 25, 2023 13:24:34 GMT -7
Any mechanical upgrades or recent maintenance done?
How many miles?
Surging is usually caused by some sort of fuel or air blockage or restriction.
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nutterduck
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Post by nutterduck on Jun 25, 2023 14:02:40 GMT -7
Any mechanical upgrades or recent maintenance done? How many miles? Surging is usually caused by some sort of fuel or air blockage or restriction. It just got it's 24k service done before i bought it, at the shop i bought from. I've spoke with a local shop who thinks its cutch related seeing that there's also a grinding feel that can be somewhat mitigated by pulling on the clutchlever.. |
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Post by willl84 on Jun 27, 2023 4:35:54 GMT -7
Sounds a little funky to me. No issues like that on my 2019 with almost 11k miles on it. I wonder if the dealer can hook their computer to it and read the throttle potentiometer in real time. I would assume they could. There might be a semi-dead spot in the travel that would cause that kind of issue. With 24k on it it's got some miles. I've seen these bikes with double that and no mention of this issue. Does it do it any time you're at steady throttle or just at one specific speed? If it does it in 6th at 70 but not at 80, or does it in 5th at 50 but not at 70 it might be that.
I'm just tossing out ideas as it doesn't sound like something mechanical to me.
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nutterduck
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Post by nutterduck on Jun 27, 2023 7:37:06 GMT -7
Sounds a little funky to me. No issues like that on my 2019 with almost 11k miles on it. I wonder if the dealer can hook their computer to it and read the throttle potentiometer in real time. I would assume they could. There might be a semi-dead spot in the travel that would cause that kind of issue. With 24k on it it's got some miles. I've seen these bikes with double that and no mention of this issue. Does it do it any time you're at steady throttle or just at one specific speed? If it does it in 6th at 70 but not at 80, or does it in 5th at 50 but not at 70 it might be that. I'm just tossing out ideas as it doesn't sound like something mechanical to me. It'll do it regardless of speed, rpm and/or gear. It is less noticeable at high speeds in higher gears, but it definitely still there. |
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Post by willl84 on Jun 28, 2023 3:58:30 GMT -7
Sounds a little funky to me. No issues like that on my 2019 with almost 11k miles on it. I wonder if the dealer can hook their computer to it and read the throttle potentiometer in real time. I would assume they could. There might be a semi-dead spot in the travel that would cause that kind of issue. With 24k on it it's got some miles. I've seen these bikes with double that and no mention of this issue. Does it do it any time you're at steady throttle or just at one specific speed? If it does it in 6th at 70 but not at 80, or does it in 5th at 50 but not at 70 it might be that. I'm just tossing out ideas as it doesn't sound like something mechanical to me. It'll do it regardless of speed, rpm and/or gear. It is less noticeable at high speeds in higher gears, but it definitely still there. That's really strange honestly. I wouldn't think it'd be clutch related only because if it's slipping like that at a steady throttle then it'd slip more under power and probably be borderline unrideable. Just for giggles have you checked the clutch lever free play? Any check engine light on? |
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nutterduck
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Post by nutterduck on Jun 28, 2023 7:15:58 GMT -7
It'll do it regardless of speed, rpm and/or gear. It is less noticeable at high speeds in higher gears, but it definitely still there. That's really strange honestly. I wouldn't think it'd be clutch related only because if it's slipping like that at a steady throttle then it'd slip more under power and probably be borderline unrideable. Just for giggles have you checked the clutch lever free play? Any check engine light on? Freeplay is spot on. Haven't had any check lights come on. So the shops reasoning for it being the clutch is a "buzz" from the it. Lightly pulling the clutch to just before it starts to slip, seem to lessen the primary issue of surging. They think its the gear on the clutch housing probably along worn springs. |
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Post by willl84 on Jun 28, 2023 8:24:09 GMT -7
That's really strange honestly. I wouldn't think it'd be clutch related only because if it's slipping like that at a steady throttle then it'd slip more under power and probably be borderline unrideable. Just for giggles have you checked the clutch lever free play? Any check engine light on? Freeplay is spot on. Haven't had any check lights come on. So the shops reasoning for it being the clutch is a "buzz" from the it. Lightly pulling the clutch to just before it starts to slip, seem to lessen the primary issue of surging. They think its the gear on the clutch housing probably along worn springs. It's certainly possible. I would think with the speed the clutch setup is spinning though that it wouldn't result in a surge. I could be wrong though, strange things like that do happen lol |
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travis
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Post by travis on Jul 5, 2023 7:16:38 GMT -7
Mine does this. 2018 US model. I think it is TPS and or APS sensor related, and using FTECU data acquisition and logging feature I was able to read some data flutter on both the TPS and APS sensors at different points in their sweep. Not a definitive answer, but seems likely.
The problem isn't so severe that I feel the need to rip into and fix it. I'll delve into it more next time I have to do some maintenance that exposes those components.
Hopefully it's not the TB actuator motor.
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