Workshop Services


  • Stator repairs
  • Sparks restored
  • Trials ignition specialists
  • Classic race bike ignition specialists
  • MX ignition specialists
  • Magneto windings restored
  • Electronic contact breaker replacements
  • Electronic ignition & 12V conversions

We offer a bespoke service to our customers, our philosophy is to first offer advice and brand new parts so the old ones need not be sent to us. However if new replacements are not available we may be able to overhaul the failed part. Our rewind and repair service is industry leading, we offer repairs for magnetos, generators and alternators whether British, European, Japanese or American. As manufacturers of electronic equipment we have in-depth knowledge of these systems, from the generator windings to electronic control units.

Our workshops are equipped with a wide range of electrical testing and system analysis equipment as well as CNC production mahines. We are a design and manufacturing company not a motorcycle repair shop and as such do not have the tools or equipment to work on complete motorcycles.

Our rewinds are carried out to the highest standards using only the best materials and industry practices by our small team of skilled craftsmen and women. At peak times the waiting time may extend considerably and  depending entirely on the demand on our workshops. We aim to look at work sent to us and give an estimate of cost as quickly as possible, usually within five days of receiving the part(s).

For up-dates on progress you must e-mail the technical team. However the technical team may not be able to answer immediately, especially when lead times are long this is because getting the actual repair work completed takes higher precedence than answering e-mails.  The front desk will be in contact as soon has the workshop passed the completed job card and repaired item to them.



Basic tests: Simple tests with a multimeter or insulation tester – Free of charge. Typically these take less than 3 minutes to perform. Results based on such tests are only opinions, not definitive nor binding.

Bench testing of CDi units: Analogue units £20 +VAT. Only confirms the unit makes sparks when triggered. Does not confirm correct timing curve.

In-depth tests: Often these can cost as much or more than a replacement part, so while we can carry out in depth analysis with the use of specialist test equipment the cost of doing so is significant. We have available the equipment to determine timing curves and performance of ignition and charging systems.

Click on the image to the right to open our pricing guide, it links to a PDF document. These prices show costs for the rewind only and does not include additional work such as releasing seized fasteners, repairing threads and leads etc.

Before starting any work we will contact your with an accurate price to complete the work needed.

We accept a range of secure payment methods:

  • Bank transfers in £ (GBP) or € (Euros)
  • Card payment over the phone
  • Secure e-mail link
  • On-line payment
  • Pay Pal

We regret that we no longer accept payment with Amex or cheques

We offer Trade prices on many products and services as well as specialist help and advice to motorcycle repair shops. The business owner will need to apply for a trade account to access discounted prices. All peer to peer trade invoices must be settled by bank transfer to recieve the best discount rates. We regret that we are unable to offer trade accounts to eBay only businesses or those run from residential addresses.

Sending parts to us

Please send your item to:

Rex’s Speed Shop
Unit 1, Russet Farm
Redlands Lane
East Sussex
TN32 5NG
United Kingdom

  1. Include your contact details as well as a phone number or e-mail address. It can cause considerable delay if we are not able to contact the owner to obtain authorisation to proceed with work.
  2.  Be sure to include more information than “as per telephone conversation here’s the part for repair”  as we speak to many people each day often regarding similar items. If you have e-mailed us, a copy of the e-mail in with the part is helpful.
  3. When sending from overseas, IE the USA or Australia, the value you declare on the parcel may cause import duty and VAT to be applied. Any duty we have to pay will be added to your bill in addition to any quoted price for the work. Be realistic of the value of a failed, second hand unit!
  4. We do not recommend customers strip parts out of a stator assembly and send them. In case the repaired part does not fit after repair where we did not have the whole assembly, this will not be rectified under warranty.
  5. We do not recommend that TZ or MX type generators are stripped by owners. These systems can easily be assembled incorrectly, even though it may look right, correcting an incorrectly assembled  system is time consuming and expensive.

Repair work is chargeable per hour and workshop prices are always quoted excluding VAT.


We accept most major credit and debit cards over the phone or we can send you a secure payment link via e-mail. The payment link works well for overseas customers but you may need to contact your bank and inform them that you wish to pay a UK company.

Alternately you can pay by bank transfer in £ Sterling or € Euros – please ask for our bank details and which currency you prefer. It would be helpful if you would like to be billed in Euros to let us know when you send your parts to us.

Trade sales – to obtain the best discount payment should be by bank transfer.

Unfortunately we no longer accept cheques


The Lucas RITA (Racing Ignition Transistor Amplified) has a long reputation for performance and reliability. However thirty year old electronics will be tired or may have failed completely. Rex’s “Rita Revival” service now means that you can stay with this winning British made ignition system and up-grade it with all new, modern electronics.

Completely compatible with the rest of the RITA system, Rex’s offer a high quality, modern circuit that fits inside AB11 & AB5 cases. The new unit is built and assembled in our own workshops and features the highest quality aluminium circuit board (not plastic) and the latest SMD components, ensuring excellent performance.

The new unit uses less power than the original RITA and features up-dates to the old design including reverse polarity protection, over volt protection and triple protection to the main transistor. The new unit is far tougher and less likely to be damaged than the original. Available for; Vincent, Moto Guzzi, Ducati, Moto Morini, Aermacchi, Hestketh, Japanese and British motorcycles that have a RITA fitted. Suitable for home fitting, comes with a comprehensive fitting guide. Our workshops are able to fit the new part to your existing RITA case for you.

Made in England


Many classic machines had alternators field windings fitted on to the crankshaft. These windings are connected to the regulator via brush gear.

We are able to overhaul the rotating field winding and in some cases the stator. Specialist tooling is required for the stator which is specific for each different type. We manufacture new windings for the rotating core, these are CNC wound then over-wrapped in a specially woven fabric. This assembly is treated with resin under a VPI process to thoroughly impregnate the new windings with resin. This will cure to form an incredibly strong composite giving the windings increased resistance to centrifugal force.

Slip rings are checked, some types can be restored even if pitted, worn or burnt, others are extremely thin and will not tolerate much machining. Finally we check the alignment to ensure the rotor runs true.


Racing ignitions require careful repair to get the best from them. Our CNC machines give the exact number of turns, wire tension and even layer build up. We have a wealth of experience with racing ignition systems and over the years we have carefully catalogued each one to create an extremely comprehensive reference database. As a result we can offer fixed price rewinds and fast turn rounds of these systems.

We can supply new ignition units or put modern electronics in to original cases to maintain original appearance for some of these systems.

Ignition Unit Testing & Repair

We are able to test many older transistor and capacitor discharge boxes on the bench. Some repairs are possible where the electronics are not set in resin. If the electronics are fully encapsulated generally no repair is possible. We are able to manufacture an increasing range of new, replacement units to replace failed ones. Please check with us before sending your unit for testing.

-Resin filled CDi units are not repairable-


We restore many electronic parts to look like brand new original equipment with the benefit of modern reliability. This service is highly popular with restorers who are looking to achieve a perfect machine complete with its original electrics that work reliably. We offer:

  • Electronics design & manufacture
  • Plating & anodising to ISO standards
  • Blast cleaning and polishing
  • Welding
  • Turning and milling
  • Sourcing of rare NOS parts
  • In-depth knowledge of Japanese electrical systems

We work to standards associated with overhauling aircraft components to restore rare motorcycle parts to ‘as new’. We have developed our own processes and equipment to strip and re-assemble parts without damaging them. Much of the restoration work is carried out in-house, with the excepting of plating and a few specialist processes.


We restore many electronic parts to look like brand new original equipment with the benefit of modern reliability. This service is highly popular with restorers looking to achieve a perfect machine complete with its original electrics that work reliably. We offer:

Fully restored Kawasaki H2/A Solid State Magneto (CDI) assembly

First the cases are stripped of the old electronics which are then professionally zinc plated to ISO 2081. Modern electronic circuits are built and test run before they are sealed to the refurbished cases. The unit is fully assembled, tested on the bench and the work is completed with a new set of decals and lead idents

Kawasaki H1/D Stator rewind

Newly manufactured Honda RS500 stator

Fully repaired and rewound TZ250 4DP generator stator

‘Restored & reloaded’ KH400 CDi unit

New electronics, case professionally replated to ISO2081, new leads & connectors backed by a one year warranty

Rare DT2-MX points magneto fully restored by Rex’s Speed Shop technicians

This model was normally fitted with electronic ignition but there was a points option for USA models. Its a very high quality competition magneto, with 2 charge coils to supply one set of points. We have in stock points and condensers for this magneto.