Giant Talon E+ no assistance after 12 km/h

[mortenik]

My Giant Talon E+ 2021 with a Giant Syncdrive Core (Yamaha) engine has a peculiar issue: The motor stops giving any assistance when the speed exceeds 11-13 km/h. Normally, this motor gives assistance up to approximately 25 km/h. Everything else about the bike seems normal, and the assistance at lower speeds works fine. The bike have passed approximately 6000 kilometers. The speedometer shows the speed correctly, so there does not seem to be any issues with the speed sensor on the rear wheel. I have not performed any battery measurements, but the range have been normal, so I do not believe it is a battery issue. I have also updated the software to the most recent version after the issue was intoduced, to no effect.

Anyone know what the issue could be? Perhaps something related to torque sensor (which I guess is internal to the motor)? Wiring? Unfortunately, there is absolutely no assistance to get from any of my local bike shops, not even dignostics (bought the bike online). I do not feel that I have the expertise to open the motor myself and start tampering, so this may leave me in a situation where the bike is unusable and perhaps unrepairable...

 

[Stefan Mikes]

Have you visited a Giant dealer?

 

[mortenik]

Have you visited a Giant dealer?

Unfortunately, I have been unable to locate a Giant dealer locally. I'd love to have a dealer run diagnostics on the bike.

 

[Stefan Mikes]

Tough luck...
Does Giant has a kind of Customer Care you could contact?

 

[mortenik]

Tough luck...
Does Giant has a kind of Customer Care you could contact?

 

[mortenik]

Good idea. I'll start by reaching out to the Norwegian main distributor.

 

[mortenik]

Good news: I was able to locate a local bike shop who said they had the right tools to run diagnostics on the bike. I'll keep any updates posted here, so perhaps we all can learn something from this.

 

[BlackHand]

Maybe you put it in demo mode somehow? Try turning the bike on then hitting the light button 5 times quickly.

Post in thread 'Possible Giant Hack' https://forums.electricbikereview.com/threads/possible-giant-hack.26258/post-176697

 

[mortenik]

Maybe you put it in demo mode somehow? Try turning the bike on then hitting the light button 5 times quickly.

Post in thread 'Possible Giant Hack' https://forums.electricbikereview.com/threads/possible-giant-hack.26258/post-176697

Oh, that's really interesting. I will definitively try this. Thanks for the tip!

 

[mortenik]

Maybe you put it in demo mode somehow? Try turning the bike on then hitting the light button 5 times quickly.

Post in thread 'Possible Giant Hack' https://forums.electricbikereview.com/threads/possible-giant-hack.26258/post-176697

Tested this yesterday, but unfortunately it made no difference. Perhaps the Talon E+ has a different system/software than the Quickie model referred to in the other post? My bike has the RideControl unit pictured below. It has the light button on the top right of the control unit (not visible in the picture).

 

[mortenik]

I was preparing the bike to go to the repair shop a couple of days ago and gave it a thorough cleaning. I test rode the bike afterwards, and the issue was gone. Bike perfectly normal again. I am not entirely sure what the issue was, but I suspect that dirt at the speed magnet/sensor may have contributed to it.

 

[Stefan Mikes]

Good to hear that!

 

[Stefan Mikes]

Morten,

A question. I know Norway a little. However, I have never thought of Norway from the cycling perspective.

Could you tell me a bit how practical is to do MTB or gravel cycling in Norway?

 

[mortenik]

I ride mostly on asphalt myself, and I am most familiar with the region of North Norway. I you decide to visit North Norway, there are several online resources that you can check out for biking in the mountain or on paths. Here are a couple:

Stisykling - Den ultimate ukesopplevelsen rundt Lyngenfjorden i Nord-Norge

✔ Stisykling i Nord-Norge ✔ Stisykling i Lyngenfjordregionen ✔ Skibotn stifestival ✔ Norgesferie ✔ Vennetur ✔ Stisykling i Lyngsalpene

www.visit-lyngenfjord.com

Sykling Tromsø

Stisykling og sykkelturer fra Tromsø. Syklingen i Tromsø er variert med tekniske utfordringer og småkupert terreng. Her kan du velge mellom toppturer med fantastisk utsikt og nedkjøring i sykkelvennlig terreng.

www.terrengsykkel.no

Stisykling i Tromsø, Troms, Norge

Stisykling i Tromsø, Troms, Norge

trailguide.net

If you want to explore some of North Norway on asphalt roads, I strongly recommend my home region of Vesterålen. It is a lot like Lofoten (the neighbouring region), but much calmer, with fewer tourists and traffic:

Cycling

Vesterålen is Northern Norway in miniature and on many recommended cycling routes you can experience the northern Norwegian coastal culture up close.

visitvesteralen.com

 

[Stefan Mikes]

Thank you, Morten!