Pushing my shifter pedal down sometimes just doesn't downshift

[navid]

I have linked a video of it happening (couldn't upload here). You'll notice after the first downshift that I have to press the shifter pedal a bunch of times before getting it to downshift again (you can hear the engine rev up in the actual downshifts). For all those presses, it felt like pushing down on air, I don't feel the clunk of a downshift. This happens from time to time when slowing from ~40mph, the first downshift always works, and then the second one skips like this.

 

https://drive.google.com/file/d/1sjqjOxbbbz6l3eFxssYJBZkH07eHbwDz/view?usp=sharing

[Triple Jim]

Is your shoe completely off the lever to start, and then you give a firm press?  In the video it looked like you're just tapping on the lever gently.  It also sounds like you may be trying to shift without disengaging the clutch, in which case any load on the transmission, like engine braking, will make changing gears difficult.

Edited August 24 by Triple Jim

[navid]

4 minutes ago, Triple Jim said:

Is your shoe completely off the lever to start, and then you give a firm press?  In the video it looked like you're just tapping on the lever gently.  It also sounds like you may be trying to shift without disengaging the clutch, in which case any load on the transmission will make changing gears difficult.

I'd say I don't have to press too hard, but that's been baked to my muscle memory from usual downshifts. This issue just happens once in a while (like maybe 1/10 downshifts, and it's always the 2nd or 3rd downshift when coming to a stop). This just happens occasionally. You can see the shifter rod and the black cap move with my feet.

 

I rev-match downshift, but I always make sure to pull in the clutch when pressing the shifter.

[Subito]

In my experience, after a 3-2 downshift you must consciously release foot pressure from the shift lever before you initiate the 2-1 downshift. In other words, you must let the lever fully spring back up before you press down for the 2-1 downshift.

[navid]

3 hours ago, Subito said:

In my experience, after a 3-2 downshift you must consciously release foot pressure from the shift lever before you initiate the 2-1 downshift. In other words, you must let the lever fully spring back up before you press down for the 2-1 downshift.

Thanks, I'll try with full pressure off the shifter. Maybe I'm not letting it fully spring back up.

 

I had a lot easier time with my MT03.

[klx678]

I have that happen occasionally when casually coming to a stop.  Based on the gear box design I'd say it was simply the shifts attempted have the gear dogs hitting instead of them engaging properly.  No real mechanical issue, just the way the design works.  Like when sitting still trying to downshift and the same thing happens, a slight slip of the clutch, the gears move the dogs engage.    

[navid]

3 hours ago, klx678 said:

I have that happen occasionally when casually coming to a stop.  Based on the gear box design I'd say it was simply the shifts attempted have the gear dogs hitting instead of them engaging properly.  No real mechanical issue, just the way the design works.  Like when sitting still trying to downshift and the same thing happens, a slight slip of the clutch, the gears move the dogs engage.    

Thanks. Yeah, I've noticed it's not possible to shift multiple gears when the bike is still. So it's a design issue.

Would you say I have to play with the clutch whenever the dogs don't engage?

[M. Hausknecht]

20 hours ago, navid said:

Thanks. Yeah, I've noticed it's not possible to shift multiple gears when the bike is still. So it's a design issue.

Would you say I have to play with the clutch whenever the dogs don't engage?

Yes. Motorcycle gear boxes are designed differently than car manual gearboxes; the gears are always engaged with each other. 

[klx678]

20 hours ago, navid said:

Thanks. Yeah, I've noticed it's not possible to shift multiple gears when the bike is still. So it's a design issue.

Would you say I have to play with the clutch whenever the dogs don't engage?

Only very slightly ease it out, bike slightly moves forward and the shift can be made.  Another way would be rocking the bike slightly.   

[navid]

3 hours ago, klx678 said:

Only very slightly ease it out, bike slightly moves forward and the shift can be made.  Another way would be rocking the bike slightly.   

What do you mean by rocking the bike?

[Triple Jim]

Push it forward and backward enough to make the transmission's gears move a little.

Edited August 26 by Triple Jim