Electrex World


BSA B25, B40, C15 | Matchless 350 | Royal Enfield: 350 Bullet Digital Ignition/Lighting Alternator Kit - STK-100D-DC

BSA B25, B40, C15 | Matchless 350 | Royal Enfield: 350 Bullet Digital Ignition/Lighting Alternator Kit - STK-100D-DC
BSA B25, B40, B44, B50, C15 | Matchless 350 | Royal Enfield: 350 Bullet Digital Ignition/Lighting Alternator Kit - (STK-100D)Timing marks - (STK-100D)Stator on engine - (STK-100D)Remove excess material - (STK-100D)
Remove excess material - (STK-100D)Remove excess material - (STK-100D)

Price (excl. vat): 270.00 / 315.90
(324.00 / 379.08 Including VAT at 20%)

Many of these items are made to order.
You will be advised on any delay.

Stator Kit Fits:

Royal Enfield:350 Bullet

NOTE: for BSA B40, B44 and B50 - models with a separate inspection cover in the clutch cover. the x4 threaded bosses protrude inwards and may touch the end of the new rotor supplied. The remedy is to remove a small amoout of material using a 'power file', or similar grinder from the inside of the threaded boss - typically 2mm. - see images above.

NOTE: Only suitable for Matchless models with a tin clutch cover where the original stator is mounted directly on to the crankshaft.

NOTE: A battery is NOT required to run the ignition or lighting but advantageous for brakelight or indicators.

  • Replacement for Lucas or Wipac alternator. Complete digital self generating ignition and alternator, pre-programmed advance curve gives optimum performance.
  • No battery, contact breaker assembly or distributor required for the ignition.
  • Simple timing set-up align marks on the rotor and stator.
  • Supplied regulator/rectifier is 6v or 12v selectable by cutting the blue wire. Output is DC to charge a small battery.
  • The battery can be replaced with a PP12 capacitor pack - see related products below, this is more reliable than a battery but has limited energy storage. See notes about battery in Fitting Instructions tab above.
  • Rotor is supplied with a taper locking collet, enabling the rotor to be fitted on the 3/4" crankshaft without the need for a woodruff key, this allows system to be fitted even if keyway is damaged. The rotor can be fixed in any position making timing easier to set up.
  • Manufactured in the UK.

Click the following link to download fitting instructions:
Download Instructions  |  Previous version (2017)


  • Road bike components - one year from the date of purchase
  • Off-road bike components - six months from the date of purchase
  • Race bike components - no warranty in line with industry practice
  • Any warranty does not cover defects due to abuse, misuse, improper installation or modification.


If any items were damaged in transit, we ask that you report it to us within 7 working days. On their return they can be replaced or a refund issued via your original payment method.

Faulty on arrival

If your items are faulty on arrival, you should inform us within 14 days of delivery. Items should be returned in their original packaging when possible with a copy of original documentation. Once we have verified the fault, we will issue a replacement or full refund to you via your original payment method.

Items faulty in warranty period

If any of your purchases develop a fault within its warranty period it will need to be returned. Once the fault has been verified, a repair or exchange of goods will be issued. If goods are found to be in good working order a testing/administration charge of 15 + VAT and return postage will be made to the customer.

Items ordered in error

If an item has been ordered in error, you should inform us within 14 days of delivery. We will not accept returned goods without prior consent except under guarantee. A minimum restocking/administration charge of 5 + VAT will be made on returned goods.

Returns We want you to be happy with your purchase from Electrex World Limited however there may be certain instances when products may need to be returned.

International Returns

International returns must be marked as 'Return - Failed Sale on any customs documentation. If there are any customs fees to pay, we will deduct these from your refund/credit.


  1. All returns must be accompanied by a copy of the original invoice and a completed returns form which can be downloaded using the following link:
  2. Returns take approximately five business days to process upon receipt of the item.
  3. We are not responsible for the loss or damage of items during their return. Please note that the customer has a duty of care whilst the goods are in their possession and that they should be thoughtfully packaged for the return shipment.
  4. Buyer is responsible for any shipping charges when returning the item.
  5. When fitting electrical parts these can be damaged by the same faulty electrical system that caused the initial failure and in such circumstances these parts cannot be returned for refund.
  6. No refund can be given If the item is out of warranty, if the item is within warranty but has been subjected to conditions beyond their specification or the item has been fitted/used.

Return Address

Electrex World Limited Units 43-46 Vanalloys Business Park Stoke Row Oxfordshire RG9 5QW

2006-2016 Electrex World Ltd. All rights reserved. Home | Terms & Conditions

Registered in England & Wales Company Registration number 04306310. VAT number 785 299 174.

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