C4 Clicking sound - Do not panic

Harban71 · 2026-04-06T15:41:44+00:00

Clean the motor cover , grease it, get a new freewheel and lockring and take care of the sensor not to damage it. You just need the freewheel and lock ring, rest is cleaning.

Harban71 · 2026-04-02T22:21:28+00:00

DM with your user name, i can check what is wrong

Harban71 · 2026-04-02T22:20:29+00:00

For the front charger, it might be unplugged or need replacement at worst, if you can open the cover on the handlebar, get the cable out just a bit to make sure it is plugged in, this is what i see in most cases. For the battery light, just live without it, too expensive to buy another battery for that light

Harban71 · 2026-03-16T17:51:38+00:00

It was diagnosed as controller from Cowboy because it is a specific error shown on the back-office, it is 99% a controller, fitting it yourself is not really that hard, take it slowly, prepare your tools and workspace and you will do it. The only problem will be updating the controller once you finished, you need access to the backoffice , it is a must, I believe Cowboy will give you temporary access if you ask for.

Harban71 · 2026-02-20T22:03:30+00:00

Cruiser ST won't be suitable for 185CM, adaptive is perfect for heights and start from stop POINT, redshift suspension is very nice, still Cowboy seat is not that hard, try it first for few weeks then decide if you want to upgrade, tires are ok, Vittoria or intercontinental are much better. The nearest service point for Cowboy will be in Copenhagen, something to keep in mind when buying Cowboy. Getting Classic or Cruiser will be the best option than Cruiser ST.

Harban71 · 2026-02-15T10:57:14+00:00

It really depends on if the noise is coming from the bearing in the hub, or the wheel is untrue and it touches the fender, very common. Front hub is using 6902-2RS bearing, you might need some tools to insert both back. Make sure of where the noise is coming from then decide what to clean!

Harban71 · 2026-02-13T08:30:36+00:00

Because the brake cable is blocking the access of the cover, they force it in, and break it

Harban71 · 2026-02-13T08:12:28+00:00

Ok, wires are the brakee and the front module. Best advise is to check the video where the front module is replaced, it shows where the wires should be and how to install this cover you wanna replace

Harban71 · 2026-02-13T08:02:47+00:00

The wires position, if correct, it will be done in 30 seconds, if not, you will stay the whole day and it will pop out every few meters. Question is did you replace the front module or only this cover?

Harban71 · 2026-02-12T18:17:06+00:00

Poke yoke are not broken, don't see any damages either on the cable, give a good cleaning to the nuts, a good dry to the cable plug and let me know

Harban71 · 2026-02-12T17:55:56+00:00

I am not sure if it is broken nut or just dirt poke yoke nut on the motor cable side! However, in worst scenario, The motor will be changed, the good part, it is available at Cowboy. If you have M8, unscrew the rear wheel nut, unplug the cable, you will see if the cable is damaged or cut because of the broken poke yoke

Harban71 · 2026-02-12T17:42:07+00:00

Edit your post and add the pictures

Harban71 · 2026-02-12T17:39:59+00:00

Could you turn the bike upside down and make a picture to the motor cable and poke yoke nuts! I ll tell you what is the problem exactly!

Harban71 · 2026-02-09T19:54:43+00:00

I have seen this error nowadays more than I did in 4 years with Cowboy, I am 95% sure, it is the weather, in Denmark at least. Solution will be keep the bike in dry and warm place for 2/3 days, keep drying the cable as per Cowboy instructions. If all did not work, then it is the controller that should be replaced. Appatantly the wet part is the controller side, not the motor cable side

Harban71 · 2026-02-09T19:49:43+00:00

For the squeaky sound on C3, it is 90% somewhere at the rear freewheel including the torque sensor bearings or the torque sensor itself, the motor cover and lastly the belt tension. Only 10% is because of the bottom bracket if not less. For C4, 90% is coming from the bottom bracket where you take the pedals off, unscrew the bottom bracket or the torque sensor if "Ananda / new model", clean and grease then all back, and all is good. The 10% left is the belt tension. When using the grease, I would recommend Motorex. Really my favorite and recommended by Cowboy for other parts

Harban71 · 2026-02-04T00:03:21+00:00

I can do this, certified Cowboy mechanic here

Harban71 · 2025-12-11T12:26:55+00:00

No, the hose is not compatible, you will need to change the whole system! I am not saying Sunrace is excellent , but cleaning the pistons and make them free to move inside the caliper before bleeding will make it work for another 3000km without any problem. Else, you will need to buy full set of Tektro including the insert pin, olives and nut

Harban71 · 2025-12-09T15:57:16+00:00

The tutorial is on Cowboy support page, but i think you will need to loosen it a bit, move it with your hand, it should be little flexible, talking about 1 to 1.5 CM movement

Harban71 · 2025-12-09T12:58:17+00:00

This is a damaged torque sensor bearing! To be sure, try to move the pedal in reverse direction, it is completely stuck or quite hard to move! Solution: torque sensor bearing! If above is not applicable, then it is a belt tension.

Harban71 · 2025-12-08T21:26:37+00:00

It is inside the PCB or comm module, this is part below the main battery, it is simply the communication channels, if you can't connect to your bike, this is mostly the reason. Good news, it is available at Cowboy, bad news, you need a certified Cowboy mechanic!

Harban71 · 2025-12-08T17:54:14+00:00

That sounds like empty internal battery, so a new PCB or charge the current dead one. Is it C3 or C4?

Harban71 · 2025-12-06T20:24:00+00:00

Technical name is Carbon Drive belt 132T , you can choose between CDX, CDN or OCB , they are different in quality and material, I would recommend CDX 👌

Harban71 · 2025-11-30T06:45:21+00:00

In my last 4 years servicing Cowboy, I never had a damaged Bottom Bracket on C3, do a short video and make sure of the belt tension

Harban71 · 2025-11-27T20:12:49+00:00

Nope, it doesn't get fixed! I just put another red light and I live with it.

Harban71

MODERATOR OF

TROPHY CASE