Hesitation/bog 2-2.5K RPM

MikeRup said:

Does anyone else feel like their bike is struggling 2-2.5k RPM? It goes from really struggling to...about to blast off at 3K RPM. With the throttle staying at the exact same spot. Notice every time I take off from a stop. It seems super touchy, goes from no throttle to riiiiiiiinnnngggg with like a mm of twist. Maybe it's just the break-in period and me keeping the revs low, but it is not smooth down low. Everywhere else, it's like butter. This is my first in-line 4 bike, is it normal?

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Copy this. I feel this just a bit as well. Let me check something out. I may have a solution

Yea! I’ve felt this exactly. Sometimes downshifting from 6th to 5th my bike will ‘click’, not sure if it’s a bad shift or the gearbox or what, but I hear it. And feel it.

russinbussin said:

Yea! I’ve felt this exactly. Sometimes downshifting from 6th to 5th my bike will ‘click’, not sure if it’s a bad shift or the gearbox or what, but I hear it. And feel it.

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I get that sometimes too with the quickshift down from 5th or 6th gear. I caulk it up in my head that I didn't hit it hard enough, but it does happen from time to time. It pops down, but doesn't make the shift until I hit it again.

russinbussin said:

Yea! I’ve felt this exactly. Sometimes downshifting from 6th to 5th my bike will ‘click’, not sure if it’s a bad shift or the gearbox or what, but I hear it. And feel it.

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Yep, I hear and feel that too when manually rev matching downshifts

Chuck Graves said:

Copy this. I feel this just a bit as well. Let me check something out. I may have a solution

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I've noticed it, but I just make sure I'm not down at 2500 rpms.

If there's a solution, Chuck, let us know, but it's not a huge concern.

Was gonna say this too. I never have the bike that low in RPM’s.

Trey On Two said:

Was gonna say this too. I never have the bike that low in RPM’s.

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I know, lol....but these break-in guidelines are ridiculous...I'm at 100 miles, can i just let it rip already?

I let it rip at mile 2 lol

I have this feeling sometimes when im at a stop or a redlight and i just declutch in first gear, sometimes i feel like im not hard enough on the gas and the bike almost choke until i reach 3k rpm.

netherlash said:

I have this feeling sometimes when im at a stop or a redlight and i just declutch in first gear, sometimes i feel like im not hard enough on the gas and the bike almost choke until i reach 3k rpm.

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Right, so you give it just a little more throttle then it abruptly goes VVVVVRRRROOOOOOMMMMM, and you're off!

MikeRup said:

Does anyone else feel like their bike is struggling 2-2.5k RPM? It goes from really struggling to...about to blast off at 3K RPM. With the throttle staying at the exact same spot.

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Edit: I just came back from riding ... I let 6th gear wander down to 16 mph (1500 rpm?), and gave it full beans, I didn't noticing anything weird, it just pulls slowly but steadily, nothing odd. I thought it started to pick up a little around 4K myself.

Chuck Graves said:

Copy this. I feel this just a bit as well. Let me check something out. I may have a solution

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No answers yet. It’s difficult to replicate consistently. Not really much of an issue but maybe one fine day we can zero in on this and improve it.

xorbe said:

Edit: I just came back from riding ... I let 6th gear wander down to 16 mph (1500 rpm?), and gave it full beans, I didn't noticing anything weird, it just pulls slowly but steadily, nothing odd. I thought it started to pick up a little around 4K myself.

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I only really notice it in 1st gear when taking off from a stop slowly, or just moving up slightly in slow/stopped traffic. It's just a little finicky, bog, bog, bog, zoom! Probably just need to always keep the revs on the higher side I guess.

I noticed it as well, and now that this discussion has been voiced by others, I definitely know it's there. Only in 1st gear pulling away from a dead stop - but that's really the only time the bike is ever below 2500 rpm. I've worked around this by just revving the engine a bit higher than that while letting the clutch out, just to avoid that bogging down. If the clutch is all the way out and you're giving it more throttle to get past the bog, and all of a sudden the car in front of you hits the brakes, could be a shitty situation.

Just slip the clutch a bit more to get going is my solution. Hopefully a flash would solve this, as I'm not sure if it's a fueling issue?

Another observation ... I don't know how to describe it, but I actually first noticed it from several online videos before we even got our bikes. What I noticed is that the sound of the rpms wasn't always a smooth increase, it sometimes sounds like a series of notchy incremental steps. Does that make sense? And I definitely get the same thing sometimes on my zx4rr. Doesn't happen on any other bike I have.

I noticed this too. Different from my Grom, R3, R7, and Bolt. Thought grom was the worst since the friction zone is almost with the clutch all the way out. But the take off from stop is different on this ZX4RR, it almost feels like I am about to stall on every dead stop take off. Is this a mapping ride by wire or inline 4 small displacement thing? Getting ready to send my ECU to 2wdw for a tune, hopefully their mapping does something to mitigate this.

Chuck Graves said:

No answers yet. It’s difficult to replicate consistently. Not really much of an issue but maybe one fine day we can zero in on this and improve it.

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With the Traction control off it seems harder to replicate. Still not convinced I can replicate the issue consistently.

Chuck Graves said:

With the Traction control off it seems harder to replicate. Still not convinced I can replicate the issue consistently.

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This makes logical sense. Damn, removed my ECU already. Wish I could try.

On the other hand, KTRC should be linked to rear wheel spin? If rear wheel spins differently from front? Or is KRTC detection methods different between models? Could just limit power I guess during take offs for this model.