Troubleshooting common 12V battery problems
Motorcycle Sport & Leisure|June 2024
Diagnosing and tracing faults with a motorcycle's electrical charging system can be a daunting prospect, but with a basic understanding of the bike's charging system you can usually get to the nub of what's wrong. We asked the battery-saving experts at OptiMate to outline the main components of the charging system, and the symptoms of the most common problems encountered with them
Troubleshooting common 12V battery problems

Key components of a charging system

The first thing to get your head round is what exactly you're dealing with. Most motorcycle charging systems consist of just three main components: a battery, an alternator, and a regulator/rectifier.

In basic terms, the battery stores the electrical energy that components, like your starter motor and lights, need to work when the engine is not running. The alternator generates the current needed to power those components when the engine is running, as well as keeping the battery charged.

The regulator/rectifier rectifies (changes) the alternating current (AC) produced by the alternator into a direct current (DC) that can be received by the battery. It also regulates the amount of current to prevent overcharging.

Amber warnings

The red flag that there's a fault somewhere in your bike's charging system is, of course, that your bike won't start. You'll just hear a 'click' from your starter motor, or nothing at all. There are some early 'amber' warnings that something is up though, these include:

SLOW CRANKING

If the engine struggles to turn over when you try to start it in the morning, it could be a sign your battery is on the way out.

BATTERY WARNING LIGHT

Most bikes have one. If it comes on whilst riding it means that your battery is no longer being charged by the alternator.

HEADLIGHT

If your bike's headlight gets brighter as you rev the engine and dims as it falls back to idle, this could be a sign your regulator isn't working properly.

PARTS PLAYING UP

Many of your bike's components rely on a steady supply of electricity to function properly. If things like your digital dash start malfunctioning, it could mean that something's wrong.

ROUGH RUNNING, OR LACK OF POWER

この記事は Motorcycle Sport & Leisure の June 2024 版に掲載されています。

7 日間の Magzter GOLD 無料トライアルを開始して、何千もの厳選されたプレミアム ストーリー、9,000 以上の雑誌や新聞にアクセスしてください。

この記事は Motorcycle Sport & Leisure の June 2024 版に掲載されています。

7 日間の Magzter GOLD 無料トライアルを開始して、何千もの厳選されたプレミアム ストーリー、9,000 以上の雑誌や新聞にアクセスしてください。

MOTORCYCLE SPORT & LEISUREのその他の記事すべて表示
Honda CRF1100L ES Africa Twin
Motorcycle Sport & Leisure

Honda CRF1100L ES Africa Twin

Without panniers he was adventuring nowhere - so at least Bertie's got something sorted now

time-read
2 分  |
October 2024
BMW R 12 nineT
Motorcycle Sport & Leisure

BMW R 12 nineT

Chad gets a track day surprise when BMW's R 12 nineT turns out to be surprisingly fun on track

time-read
2 分  |
October 2024
Test fleet: VOGE 525 DSX
Motorcycle Sport & Leisure

Test fleet: VOGE 525 DSX

After testing the Voge's abilities on a long ride, it was time to take it to the Cotswolds and see how it would manage on the rougher stuff

time-read
2 分  |
October 2024
Portuguese Perambulations
Motorcycle Sport & Leisure

Portuguese Perambulations

Nearly over before it had begun, a brief workshop stint allows Spain and Portugal to be explored

time-read
8 分  |
October 2024
Highway to Heaven
Motorcycle Sport & Leisure

Highway to Heaven

Three friends take on the challenge of riding the length of Canada, from Vancouver in the southwest to Inuvik in the north. The road is long, the conditions merciless, and wildfires are tearing through the country. To top it all off, the final leg of the journey is the ultimate test of gravel riding skills, nerves, and courage - it's the legendary Dempster Highway...

time-read
9 分  |
October 2024
Battlaxes at the ready!
Motorcycle Sport & Leisure

Battlaxes at the ready!

We tend to take tyres for granted, never really looking at them in any detail, or at how they work, just hoping that they keep us shiny side up at all times. Even in the wet

time-read
6 分  |
October 2024
Ducati Riding Experience
Motorcycle Sport & Leisure

Ducati Riding Experience

When I rode the Ducati DesertX to France last year, I did have a bit of an explore on some easy fire roads and gentle green lanes in the wilds of the Médoc area, but was left with the feeling that, had I the experience, the DesertX would have been capable of taking me along some more extreme trails to some even more exciting places. If only there was a way of finding out just how well the Italian adventure bike could cope with some more extreme terrain...

time-read
7 分  |
October 2024
Four pot flyer
Motorcycle Sport & Leisure

Four pot flyer

Many said that sports bikes, and particularly bikes in the traditional Supersports class that was populated by 600cc inline fours, were dead. Maybe they spoke too soon?...

time-read
8 分  |
October 2024
Eastern adventurer
Motorcycle Sport & Leisure

Eastern adventurer

With an increasing interest in smaller capacity adventure bikes, the market expands with a new entry

time-read
10 分  |
October 2024
First Time Lucky?
Motorcycle Sport & Leisure

First Time Lucky?

It's ironic that the first all-new MV Agusta model to hit the marketplace right after Italy's No.1 trophy brand was acquired by Austrian giant Pierer Mobility, owner of off-road titans KTM, should be the company's first dual-purpose model of the modern era, powered by MV's all-new 931cc three-cylinder engine that's destined to form the basis of a whole series of new models in coming months and years.

time-read
9 分  |
October 2024