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[oobflyer]

No, it hasn't happened again - whatever they did in April did the trick 

[manlytom]

interestingly on my 2011 I had during hot weather very occasionally a motor cut out - no warning lights. Only once the "contactor" warning code came up. So what to do on that one ?

now in colder weather bike runs very well. Have only a slide noise in the motor that seems to come from the brushes - do not notice performance issues though. Any other Agni rider having this ?

[Lipo423]

In my case -after 1.800 Mi never had the "glitch" problem for far...but sooner or later it will also happen to me...no question 

"In this kind of intensive use digital-controlled applications, using mechanical potentiometers -the conductive plastic ones last a little longer-, sooner or later the headaches show up...
I really hope Zero is working in replacing the potentiometer system for a hall-effect sensor, or any other digital transducer (with a suitable retrofit kit for all of us). Software twisting, or adjustments may soften the problem, but it will not fix it long term as a pot. it is made of different components subjected to friction. Unfortunately, I know what it is like...(had to replace a few hundreds potentiometers in a machine joystick controller, and in the end move to hall-effect)" since that upgrade as far as I know the customers only brake the joystick handle 

[expevride]

I had a strange issue also, was stopped at a traffic light for about 30 seconds, when it was time to go ...nothing, pushed to the curb and turned off the key then on, ok since then..weird--no codes or warning lights

[ColoPaul]

Update:  Glitched twice Monday, once Tuesday, four times Wednesday, and today I was barely able to get it to work and back.
Doesn't seem like software, since I had no glitches for 1800 miles, now this.

I'll have to load it in the trailer and haul it down to service tomorrow. 
They said they'd take data files and measurements, send it off to Zero;  3-4 days later Zero will recommend what they should replace; 3-4 days more waiting for parts to arrive and then 1-2 days to get the parts installed.  Yuk, 2 weeks without my bike. 

Interestingly, unlike the 'freeway speed' glitch talked about mostly in this thread, my glitch occurred under 5 mph, generally with throttle wide open--although it got worse through the week--Today I saw the glitch decelerating as well as accelerating, and at speeds as high as 15-20 mph.

[Lipo423]

It is very likely to be the pot. malfunctioning.
The resistance variation/noise produced might be driving the bike computer crazy...2 weeks out of service for just a $5 part

[Electric Terry]

ColoPaul, mine is doing this also.  Mostly when trying to go full throttle or close to it from a stop or slow speed.  I have a brand new BMS and the highway cutouts from rain are hopefully over.  This seems like it has to do with motor timing for the correct phase input to the Sevcon.  I am just used to it for now and go easy till about 10 mph if I am in heavy traffic and always leave myself an exit to pull over.  The dealers have the equipment to reset the timing.  My closest dealer is almost 200 miles away, but I plan to ride it there and have them reset it while I wait and ride it home.  This might be a strange observation, but I feel it is worse the hotter it is outside, not sure if there is a connection there or not.

[BSDThw]

ColoPaul I had a defect throttle and it was a bit similar to our first post.

I had power loss and at a uphill part the bike was nearly dead. After a certain time I could ride. Next day at morning it was running but felt a bit week, afternoon it was as weak that I had to push it on my trailer.

The strange thing for me is the "regenaration" of the throttle and the fact it runs once only 10Km/H than quite normal next day nearly nothing. Therefore my first thought was not a simple Throttle defect.

[ColoPaul]

Thanks for all the feedback, guys.  It's good to have a Zero support group!

ColoPaul, mine is doing this also.  Mostly when trying to go full throttle or close to it from a stop or slow speed.  I am just used to it for now and go easy till about 10 mph if I am in heavy traffic and always leave myself an exit to pull over.  

Interesting, this sounds like my problem except I went from "never happened in 1800 miles" to "couldn't get the bike moving without manually pushing it to 2-3mph and then VERY carefully applying throttle and even then it's a 50-50 chance it'd crap out" in just 4 days.   How often would you say you experience the glitch?

It is very likely to be the pot. malfunctioning.  The resistance variation/noise produced might be driving the bike computer crazy...2 weeks out of service for just a $5 part

Well, it's in the shop now.   4 hour start-to-finish to get it there!   When the diagnosis comes in I'll post what they say.

[protomech]

Got the glitch twice today (7/19) when riding back from work. Bit disconcerting.

And once yesterday (7/20). Guess it's time to call Zero.

[monarchhonda]

New here. So today I was riding in sport mode coming out of a parking lot. I heard a clunk sound and the engine died. After recycling the key twice it started to work, but now there is a violent vibration coming from the motor. Any ideas?

Never mind, just plugged in, and after 45 min. unplugged. Bike is smooth again.









2012 ZF6 1045 mile in 4 weeks.

[protomech]

Sounds exactly like what happened to me on Thursday - moderately hard braking, and a thunk right before the bike stopped.. and then nothing when I twisted the grip.

Edit: Before it failed friday (7/20), the motor started to suddenly run a little roughly, then it cut out completely. If you've ever run out of gas on a gas motorcycle, it feels very much like that. Today (7/23) it also began to run a little roughly but did not cut out.

I bet Lipo423 is correct. I think a failing throttle assembly (whether it is a pot or not) starts to send a noisy signal to the control computer. I think the control computer already does some filtering on the signal (to smooth it out, and possibly to enable the Eco / Sport modes) .. when the signal starts to change more quickly than the physical assembly could possibly control (for example full to zero in 5 ms) or the computer registers a certain number of these events within a certain time period, the computer kills the throttle until the bike is restarted. It's irritating is there is no control code shown on the bike display when this happens.

[baumisch]

Interesting thread, had the Problem once already at 600km on the clock,
now 1200km - no problems.

Do you think this will be recall #3 in my first 5 weeks of ownership?
Would love to get hall sensors as replacement ....

[Lipo423]

I'm seeing this as a "follower" of the BMS board replacement...and really, really hope they are working one this as someone could have an accident because of this 

Protomech: Have you checked the pot type we have in our bikes? Is it carbon, or conductive plastic? (I did not check myself as I did not want to "call for bad weather"

If it is carbon, a "$5 home made" solution is to replace it for conductive plastic (it produces less noise) until we have a better solution from Zero.

[mehve]

Aiyaa.... you guys are so much more technically apt. :/

I just wanted to express gratitude for this thread, and I dread the glitch. 

I get this now every time I ride ~ often randomly: My 2012 S ZF9 would be operating like normal, but then at a stop either on level ground or at slight incline, the expected response to the throttle doesn't happen (and I just about break into sweat as the bike rolls back one foot due to said incline), I would then let the throttle spring back to neutral and roll-back on the throttle all the way until I get the response (and never had to wait more than 2 seconds). Eco mode. More likely to happen at an incline than level, and I probably look like I'm forgetting to engage the clutch pumping the throttle like that... except for the silence.

I'm a very new rider, only in my first 3,500 miles (ever) on motorized two wheels, and I'd already dropped the bike once (thankfully -- and embarrassingly -- when parked, and needed help hoisting it back up*).

+ m

* probably would not be a problem if I engaged in a fitness regimen. ha!