Workshop services

Workshop services



Rex's Rewinds - Stator Repairs - Starter Motor Repairs -

Alternator Parts & Repairs - Ignition Troubleshooting - Electronics repaired - Machining & Restorations.

We offer a fully comprehensive component repair & rewind service for all motorcycles; American, British, European & Japanese. We specialise in ignition and electrical systems, however we are not a motorcycle repair shop. Our machine shop can make & repair mechanical components, while our electronics & wound component workshops are equipped to test and fault find many electronic ignitions, rectifiers and voltage regulators. We can repair & rewind a wide range of ignition, trigger (pick-ups) and lighting coils. We also repair competition ignitions that require a high level of accuracy to get the best from them. We have comprehensive workshop equipment that allows us to bench test generators and ignitions so that we can trouble-shoot them without the system under test being capable of running the engine.

We repair mechanical, electro-mechanical & electronic component parts, however we do not have facilities, tools or insurance to take in complete motorcycles for repair. 

  • Testing & diagnostic check of generators & ignition systems
  • In-house precision manual and CNC winding service
  • Comprehensive maching service & specialist repairs
  • Powder coating (small items - no frames or wheels)
  • Alternators with slip rings and brushes repaired
  • Parts for self contained alternators available
  • Hydraulic & manual presses 1-30 tonnes
  • Reclamation, restoration and refinishing
  • Starter motors serviced & repaired
  • Undercutting of commutators
  • Lucas Rita units repaired
  • Electronics manufacture
  • Trade rates - we are VAT registered
  • Payment accepted in £ GBP or € Euros


​Click on the picture below to see our retail pricing guide for rewinds



We offer free inspection and assement using test meters for generators and wound components. We may charge to test an electronic ignition, to confirm the performance of a regulator or to set up and dynamically run a generator (as shown above) due to the time taken and equipment needed to do this.

Sending parts to us

Please send your item to:

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

Check our rewinding pricing guide first (click on the picture above). This has pictures of all the common rewinds we carry out. You can telephone 01580 880768 but look at the guide first to help you correctly identify the part you need repairing the pictures are a helpful resource. You can e-mail pictures or enquiries to: tech-support (at) for an estimate of repair costs. Prices start from £40 +VAT for repair work. We offer many fixed price repairs as well as a bespoke restoration service.

We quote an average turn round time of 3-10 days for repair work during low season and 2-4 weeks in Summer. Restoration work will be longer, particularly if we have to make tooling to perform the work. We always try to return your component to you as quickly as possible. Our workmanship is second to none, we believe in doing the job correctly, not to the lowest price.

To reduce waiting times we offer a range of exchange generators:

New & Exchange Generators Available - Quick Turn Round


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 must be paid for by bank transfer, cards will incur a 3% surcharge

Unfortunately we no longer accept cheques.


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. Please include a brief description of the service you require.  Be sure to include more information than "as per telephone conversation here's my generator" as it is unlikely the person you spoke to will book the item on to our system. Also 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. Be realistic of the value of a failed, second hand unit as any duty we have to pay will be added to your bill.

4. When sending plain type CDi source windings for repair, if there are two mounted one above the other, we require BOTH, even if only one is to be rewound.

5. We do not recommend that TZ or MX type generators are stripped by owners. These systems can easily be assembled incorrectly leaving you with a system that looks right but simply will not run.

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

Trade Customers

We are happy to offer trade rates and technical advice to motorcycle repair shops, we have in-depth specialist knowledge that goes beyond the shop manuals and we can help to diagnose a fault without the need to try replacement parts. We require a trade application form to be filled out. Trade sales must be completed by bank transfer. Unfortunately we cannot offer discounts to businesses run from domestic properties or those who only have an eBay shop.

We will look at any Japanese, Italian, German, American, Hinckley Triumph parts and Lucas RITA boxes but regret we do not work on British magnetos. 



Starter Motor Repair

We can repair many Japanese and European starter motors fitted to motorcycles and ATVs. We will strip and advise on what repairs are possible, if the unit has suffered a servere failure or been damaged by in-expert disassembly it maybe un-economical to repair it. We are able to supply brushes for many models.

Alternators with Rotating Field Windings

Many Classic Honda, Yamaha & Suzuki machines had alternators with brushes and field winding that spins on the end of the crankshaft, for example the XS650, 750 & 850 and Suzuki GT750 and well as many Honda models.

We are able to overhaul both the stator and rotating field winding. The rotating core is CNC wound with copper and a high strength fiber. The winding is then over-wrapped in a specially woven fabric. The assembly is treated with resin under a VPI process to ensure thorough resin impregnation. Both the fiber and fabric soak up resin to form an incredibly strong composite which ensures the windings have increased resistance to centrifugal force. 

Slip rings are checked and their surface can be restored even if pitted, worn or burnt. Finally we check the alignment to ensure the rotor runs true. We can supply brushes for many of these alternators.





Self Contained Alternators

We can supply new replacement alternators, parts and service many self contained alternators as fitted to many modern machines. However at present there are no parts books available therefore we need to see your alternator to determine what parts are used in it. We can obtain regulators, rectifiers and bushes for many of these units.


Regulators repaired


TZ, MX and Race Ignition Systems

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 perform basic static checks to see if a unit operates or full dynamic testing of ignition units to check the advance/retard function is working correctly. For some systems we can alter timing curves. We can supply new ignition units or put modern electronics in to original cases to maintain original appearance. 

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 removing the resin is possible but it takes a huge amount of time (chargeable per hour) and does a lot of damage to the delicate components inside. We are able to manufacture an increasing range of new, replacement units to replace failed ones. Many Japanese ignitions from the 1970's & 80s multi-cylinder machines (XVs are a common example can be repaired). Please check with us before sending your unit for testing.




Lucas Rita Service Centre

Our in house Lucas Rita service center offers repairs from £40+VAT. With no 'middle man' we offer good quality at sensible prices, also the chance of your unit being lost is reduced as we do not forward these to other comapnies for repair. Our services include; main transistor upgrades, dead units revived, accidental damage repaired, case polishing, lead and connector replacement. All AB11 units and some AB5 can be repaired. Full range of compatible HT coils, leads, caps and up rated HT coil diodes available. All car systems, Moto Guzzi, Ducati, Moto Morini, Aermacchi, Hestketh and British motorcycle systems catered for.

Click on the picture for our guide on Lucas Rita testing and information


Bespoke Restorations

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:

  • 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. We manufacture parts for vintage Japanese machines and do most of the restoration work in-house, including the production of modern, reliable electronics to replace failed originals.

When comparing prices, remember we do not cut corners. We don't use home brew plating kits as the finish is never as good and doesn't last like a professional finish. We control the design and manufacture of new parts at every stage and have a wealth of detailed knowledge regarding the inner workings of these systems.

Wiring Looms

We are able to manufacture one-off wiring looms. We do not take in full motorcycles so we need a good condition original wiring loom to work from plus all the parts you want to plug in. If you do not have one we can send you a kit of sleeving that you can tape together to show where all the branches need to go. We do charge a design and set up fee of £50 +VAT. Prices start from £250+VAT for a very basic stripped down loom for a cafe racer for example. To remanufacture an exact copy of a standard Japanese loom will be around £750+VAT. We tend not to take on standard looms during the summer months due to the time they take.

Examples of our work:

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:


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.