Triumph Speed 400 regulator rectifier

Regulator rectifier for the Triumph Speed 400: when to replace it, what it costs, where to buy it and how to fit it.

ReplaceFailure

Typical priceUS$ 15 to 120

Difficulty2 of 5

Safety-criticalNo

Regulator rectifier for the Triumph Speed 400

Workshop photos

Diagram of a mechanical voltage regulator with its gaps

Where to buy

Check the part number for your model year before you buy. Genuine (OEM) parts first; good aftermarket parts are fine for wear items. Links open shop searches; Moto Zero earns nothing from them today and will say so here if that changes.

Fit it yourself

Test the regulator rectifierHome workshop · 30 to 45 min Test the charging systemHome workshop · 20 to 30 min

See it working in 3D →How it works

Fitment

Model	Triumph Speed 400
Type	Retro
Engine	400 cc
Final drive	Chain
Brakes	Disc
Main markets	UK/IN

Questions

How often should I replace the regulator rectifier on a Triumph Speed 400?

As a guide, Failure. The owner's manual for your model wins, and riding on dusty roads, with a passenger or with heavy loads shortens it.

How much does a Triumph Speed 400 regulator rectifier cost?

Typically US$ 15 to 120, depending on genuine or aftermarket and the shop. Prices are indicative.

Can I replace the regulator rectifier myself?

The job is rated 2 of 5 for difficulty. Follow the step-by-step guide and the values for your model.

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All parts for the Triumph Speed 400 → Regulator rectifier for other bikes →