Start/Trial/Cross: Only 1 or 2 LED indication after charging/low runtime

WARNING!

If You don’t have suffcient mechanical knowledge, experience and proper tools, we strongly recommend, that You have these operations done by Your selling dealer or at Your local motorcycle service center! Making mistake during the disassembly or assembly of the electric system will void the warranty and may cause a hazardous situation, resulting in fire, severe injury or death and damage to property.
For safety reasons it is strongly recommended to leave the battery discharged before handling any component of the motorcycle's electrical system!
Do not let the battery to stay fully discharged for longer than neccessary, as it may have a negative impact on its capacity. Charge the battery after each ride.

Table of contents:

Unproper charging procedure and/or frequency
Using the motorcycle at temperatures out of recommended range
Faulty charger, charge port or battery

1. Unproper charging procedure and/or frequency

CAUTION!

The charge port cap is rotatable (MY2024 and older). Rotate it to open the charge port.
Be sure to use the correct charger. Lead-Acid and Li-Ion versions (MY2024 and newer) use the same charge port, but the charging curve and voltage is specific for each battery.
New battery needs several discharging and charging cycles to reach its full capacity.
If the charger is plugged into the motorcycle with the charger switched OFF, a potential inward rush of electrical current from the motorcycle’s battery may damage the charger.
Optimum charging and storage temperature is 50 - 77 °F (10 - 25 °C). Do not charge the battery, if the temperature is out of this range. Too low or high temperature may permanently damage the battery.

Follow these steps to charge the KUBERG Trial/Cross motorcycle:

Ensure, that the magnetic kill switch is in OFF position (magnet NOT attached).
Connect the charger to an electrical outlet. The LED on the charger will glow blue (Lead-Acid battery charger) or green (Li-Ion battery charger).
Connect the charger to the charge port on the motorcycle. The LED on the charger will glow red (Lead-Acid battery charger) or yellow (Li-Ion battery charger).
When charging is finished, the LED on the charger will glow green.

Frequency and duration of battery charing:

The Lead-Acid battery in Start consists of 2 batteries, each with 12 V nominal voltage (above 14 V fully charged), connected in series. The Lead-Acid battery in Trial/Cross consists of 3 batteries, each with 12 V nominal voltage (above 14 V fully charged), connected in series. The Li-Ion battery consists of 1 battery, enclosed in a metal box. Every KUBERG battery for Start/Trial/Cross has a rubber surface from below to prevent abrasion between the frame and a battery and to minimize the risk of formatting an impact cracks.
Charging time may vary depending on the battery type, supplied battery charger, state of charge, ambient and battery temperature and state of health of the battery.
The Li-Ion battery has an advanced battery management system (BMS), which monitors each cell voltage, currents, temperatures etc.
The Lead-Acid battery can be upgraded to Li-ion battery.

Lead-Acid battery charging:

Fully charge the battery before the first ride.
Fully charge the battery after each ride.
Fully charge the battery after every 60 days of storage.

Li-Ion battery charging:

Fully charge the battery before the first ride.
Fully charge the battery after each ride.
Fully charge the battery every 90 days of storage.

2. Using the motorcycle at temperatures out of recommended range

Recommended operating temperatures:

41 - 95 °F (5 - 35 °C) for Lead-Acid battery
32 - 95 °F (0 - 35°C) for Li-Ion battery

Recommended storage and charging temperatures:

50 - 77 °F (10 - 25 °C)

Very cold weather is hard on the motorcycle’s electrical system and may cause, that the battery charge won’t last as long as at temperatures around 20 °C. Furthermore a Lead-Acid battery is more influenced by low temperature than a Li-Ion battery.

3. Faulty charger, charge port or battery

Follow these steps to check the function of each part:

Required tools:

hex wrench #6
Torx wrench #T25
multimeter
brush
technical alcohol
compressed air source with moisture separator

Ensure, that the magnetic kill switch is in OFF position (magnet NOT attached).
Place the motorcycle on a solid and level surface of a mounting stand, so that both wheels are on the ground.
Connect the charger to an electrical outlet. The LED on the charger will glow blue (Lead-Acid battery charger) or green (Li-Ion battery charger). If the charger have no visible LED indication, even if it has a LED, then it is probably faulty.
Measure the charger output voltage – it should be approx. 44.5 V for Lead-Acid battery charger and approx. 42 V for Li-Ion battery charger. If the charger has very different output voltage (difference greater than 1.5 V), or the output voltage is measurable only when its connector is in specific position, the charger or its connector may be faulty.
Connect the charger to the charge port on the motorcycle. The LED on the charger will glow red (Lead-Acid battery charger) or yellow (Li-Ion battery charger). If the LED colour does NOT change after connecting, the charge port may be either disconnected from the battery, or it may be faulty (see below).
Charge the battery to 100%, then disconnect the charger from the motorcycle and note the current time. When charging is finished, the LED on the charger will glow green. If the charging process will not finish even after 12 hours, the charger or battery may be faulty.

Follow these steps to uncover the motorcycle battery and charge port:
(Only for Cross): Using the hex wrench #6 loosen and remove the underseat bolt, located on the underside of the upper plastic bodywork (above the rear wheel), slide the seat forward and remove it from the motorcycle.
Using the Torx wrench #T25 loosen and remove the upper 4 bolts from the upper plastic bodywork (2 on the left side + 2 on the right side).
Remove the upper plastic bodywork by gentle pull up.
Using the Torx wrench #T25 loosen and remove the 4 additional bolts from the left and right plastic bodywork (2 on the left side + 2 on the right side) and with a light frame tilt on the mounting stand remove both plastic bodyworks.

NOTE:
The Lead-Acid battery consists of 3 batteries, each with 12 V nominal voltage (above 14 V fully charged), connected in series, while the Li-Ion battery consists of 1 battery, enclosed in a metal box. Every KUBERG battery for Start/Trial/Cross has a rubber surface from below to prevent abrasion between the frame and a battery and to minimize the risk of formatting an impact cracks.
Wait 1 hour from the moment of disconnecting the charger from the motorcycle, then measure the DC voltage of the battery:
(Only for Lead-Acid version): Do NOT disconnect any cable and measure the voltage directly on each battery. If the voltage is below 12 V, consider battery exchange. Optionally You can use a charger with recovery mode to charge each battery separately. When changing batteries, do NOT mix old batteries with new ones! (see knowledgebase article "Battery removal and installation")
(Only for Li-Ion version): Disconnect the main red battery connectors and measure the battery voltage directly on battery poles. If the voltage is below 34 V, consider battery exchange. (see knowledgebase article "Battery removal and installation")
Disconnect the charge port and clean its connector properly with a brush, technical alcohol and pressurized air.
Disconnect the charger from the electrical outlet.
Use a multimeter with the circuit check function. The correct function of the charge port is:
Without the charger, middle and right pin on the output connector = open circuit
With the charger, middle and right pin on the output connector = closed circuit

Follow these steps to reassemble the motorcycle:
With a light frame tilt on the mounting stand reinstall the left plastic bodywork and using the Torx wrench #T25 install and tighten the 2 lower bolts (5 - 6 Nm).
Repeat the same step with the right plastic bodywork.
Reinstall the upper plastic bodywork, align its 2 left holes with the holes on the frame and on the left side bodywork, reinstall 2 bolts and using the Torx wrench #T25 tighten them (5 - 6 Nm).
Repeat the same step on the right side.
(Only for Cross): Install the seat by sliding it backward on the bolt, located close to the Torque & Speed control button, and align the hole in the seat and the upper plastic bodywork with its corresponding hole on the frame just above the rear wheel.
(Only for Cross): Install the seat bolt and tighten it using the hex wrench #6 (18 - 20 Nm).
Double check, that all bolts and nuts are properly tightened.

If Your motorcycle is under warranty, please register it on our website, if You have not already done so:
https://www.kuberg.com/en/bike-registration

If the problem persists, please contact Your dealer or KUBERG customer service (support@kuberg.com). For the fastest possible resolution please send:

VIN of Your motorcycle (it is stamped on the right side of the steering column).
Detailed information on actions taken so far, a few photos and preferably a video.

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Start/Trial/Cross: Only 1 or 2 LED indication after charging/low runtime

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