REX’S REWINDS
IMPORTANT: As of 25/07/2025 we are no longer taking in rewind work. We have a 6 month waiting time due to the volume of work already booked in.
Any item that arrives at our workshops will be returned. Thank you for your understanding.
Phone
0044 (0) 1580 880 768
Workshop Services
- TZ Rewinds
- Kawasaki Triple CDi Ignition & Rewinds
- SR500/RD250/RD350 Rewinds
- Rotax MT350 | MT500 | CCM604 Rewinds
- Suzuki GT models Including 750cc
- Honda CB72-77, CB250 & CB400 Superdream rewinds
- Testing of regulator rectifiers
- Lucas Rita repair and knowledge centre
- Full Testing of Pazon Ignitions
- Full Testing of Tri-spark Ignitions
- Classic bike ignition systems
- Dynamo parts specialists
- Testing of certain CDI Units
Generator Rewinds – Please Check Our Listings to See If We support Your Model.
When your stator needs rebuilding, you want more than just a repair – you want performance you can trust. At Rex’s Speed Shop, we don’t cut corners. Customers come to us because of the work we are able to produce. Our rewinds are carried out to exacting standards by skilled technicians who know what it takes to match – and often surpass – OEM quality. We follow guidelines set by the Association of Electrical and Mechanical Trades (AEMT) to reduce industrial waste and champion use of best practise in industry.
Precision Matters with CDI and Alternator Windings
When it comes to CDI source coils and alternator windings, precision isn’t optional – it’s essential. CDI units rely on exact input signals to function correctly. If windings are old, poorly repaired IE even slightly out of spec this, in some cases, will cause hard-to-trace faults like ignition lock-out or poor running. In charging systems low output is often the result when the number of turns aren’t the same, even if the rewinder added extra turns. That’s why we rewind to OEM specifications with absolute accuracy – typically within 5%, often better. The closer to OEM, the better your ignition and alternator will perform. Substandard rewinds, that are not to OEM specifications will void warranties on CDI units and charging system components if problems arise later.
No rush jobs, no guesswork – just proper engineering, done right. If you’re serious about getting it fixed properly, it has to be Rex’s.
HOW LONG WILL IT TAKE?
We maintain a stock of newly manufactured parts, including replacement windings, service exchange stators, and brand-new stators. These options are typically quicker than a rewind and can offer an efficient solution when time is of the essence.
We do not offer a rush service for stator rewinds and typically have a waiting list for work. Our focus is on ensuring the longevity of every repair, with the goal of restoring the stator to its original standard, often the original has survived 40 plus years which is an achievement in itself. This commitment is why we do not compete solely on price. Our customers expect, and value this level of service.
If you’re preparing for a race, auction, or simply need your machine ready for use, we recommend planning ahead and having the electrics serviced with ample time to spare. It’s also important to include a realistic budget for the necessary work. While we always strive to accommodate your timescales, please note that quick turnaround rewinds are rarely available.
REWIND & REPAIR PRICING GUIDE
Important: Version 9 of our service guide is now in effect and replaces all previous versions. Customers are strongly advised to read it carefully, as our service terms have been up-dated along with improvements to working standards.
Please note that we only work on the motorcycle stators listed in the guide, so it’s essential to check we cover your model before sending anything in.
Click on the image to view the latest pricing guide (opens a PDF Document)
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
- When sending from overseas, IE the EU, USA or Australia, the value you declare on the parcel, OR insure it for will cause import TAX to be applied. This TAX is added to your bill in addition to any quoted price for the repair work. If you put a large amount you will have a large bill to pay on top of the repair.
- Be realistic of the value of a failed, second hand unit! A value of $10/€10 is fair for a failed old motorcycle part! Usually such a value means no TAX is added.
- Include your contact details as well as a phone number or e-mail address. Delay results if we are not able to contact the owner for authorisation to proceed with work.
- Include a conscise explaination along with the item you have sent. If you have e-mailed us, including a copy of the e-mail is very helpful and will speed things up. We speak to many people every day often about similar bikes so “As per telephone conversation here’s the part for repair” can cause a long delay while we wait for you to contact us.
- We often refuse to work on stators customers have stripped parts out of. The full stator with its mounting plate and windings in position should only be sent.
Repair work is chargeable per hour and workshop prices are always quoted excluding VAT.
Payment
We accept most major credit and debit cards over the phone or we can send you a secure payment link via e-mail.
Overseas customers may wish to use Wise. This service may save the customer a considerable amount on foreign currency exchange fees. Check the Dollar cost of your bank or debit card, then compair the Dollar cost to you at WISE.
We can supply our bank account details on request.
Take care to enter account details accurately.
Take care to ensure you pay in the correct currency.
REX’S Kawasaki Triple Stator Rewind CDi & Electronic Up-grades
At Rex’s, we bring over a decde of expertise in repairing and manufacturing electronics for Kawasaki triples. Aside from new, ready to fit electronics we offer two levels of service:
Bespoke restoration – For owners seeking the highest level of originality, with full restoration, plating, and decals where needed.
Modern electronics in un-restored cases – For owners who need our modern electronics inside, but to leave the petina finish on the metalwork in tact. Note removing the old electronics may affect the metal finish.
We also offer a wide range of products and services, including new regulator rectifiers, HT ignition coils, stators, and an industry-leading rewind and restoration service. Our team has the specialist knowledge and equipment to test and ensure every part we produce works staright from the box. Where these systems prove stuborn to coax back in to live our experts are on hand via e-mail to advise.
REX’S RMK Ignition Kit Repair, Service & Parts
We offer full support for our own electronic ignition systems, providing fast and reliable spare parts and repair services. Our expertise covers a wide range of kits, including XT500, DT250, DT360, DT400, TY175, TY250, and SWM ‘RMK’ models. As the original manufacturer, we have the knowledge and equipment to fully test, troubleshoot, and get you back on track—quickly.
Unlike most competitors, we offer comprehensive servicing, spare parts, and repairs for our own ignition upgrades. All parts currently in production are available as spares, ensuring you’re always covered. Our goal is to get older kits running again, often at less than of the cost of a new system, saving you money wherever possible.
While some of the very early systems are no longer supported, we always strive to explore cost-effective options to help you keep your system running.
We maintain a stock of new parts, ready for quick dispatch, and there are no inspection fees for RMK kits.
– RMK CDi units
– Source windings
– HT coils
– Stator Looms & hardware packs
Made in England
CLASSIC TZ, MX AND RACE IGNITION – TZ REWINDS
Racing ignitions require careful repair to restore tham and ensure they are reliable. Often the OEM equipment will out perform so called modern up-grade systems, so it is worth repairing. 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.
Poorly repaired, old or off specification windings can cause CDi units to ‘lock out’ or give running issues. CDi windings must precisely match the OEM specification, within 5% or closer for maximum sprak strength. The closer to the specification the better the ignition will perform. Windings that are old, poorly repaired or off specification will invalidate any warranty on CDi units.
We can supply new ignition units as well as seal modern electronics in to original cases to maintain original appearance.
ALTERNATORS WITH ROTATING FIELD WINDINGS
Suzuki GT750 | Honda CB750 | CB900 | Yamaha XS650 | Kawasaki H1-A H1-C
To fully modernise the system, we’ve developed MOSFET voltage regulators that fit inside the original cases (once the old mechanical mechanism has been removed). This allows you to retain all the original parts, essential for maintaining the full value of a restored machine. It’s not just about originality; it’s a machine with original components that will continue to work reliably for years, and that’s truly a delight.
The only real ‘problem’ with the generating machinery, IE the rotor and stator, is that it’s now around 50 years old. However, when properly repaired, the original equipment has already proven its reliability for decades. Moreover, machines that remain completely standard tend to retain a higher value.
At Rex’s, we have CNC winders, the right tooling, and the expertise to ensure the job is done correctly.
Lucas Rita | Pazon | Rita Revival | Service & Parts
The RITA Ignition system has been out of production for many years but remains in regular, daily use. Rex’s provide everything you need to keep the iconic 1970s AB5 & AB11 running smoothly, adding a touch of vintage authenticity to your ride. Our “RITA Revival” repair, along with replacement parts, is available, and we offer free online access to helpful information. Additionally, historical wiring guides are available for reference; while these are no longer current, they may still serve as a valuable resource for owners.
We are the only UK-based centre that holds all the necessary spare parts for Pazon ‘Sure Fire’ kits. We maintain stock of every part required and have the capability to test these ignition systems under real load conditions.
We also offer a quicker solution for customers who prefer not to wait for kits to be returned to New Zealand. Please note that we handle warranty claims only when the customer provides proof of purchase from us. We are able to assist other vendor’s customers, although we may make a charge in this case.
Important – Please check BEFORE sending units for testing, a vast range of euipment would be needed to test every ignition ever produced!
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 who are looking to achieve a perfect machine complete with its original electrics that work reliably. We offer:
- Electronics design & manufacture
- Plating & passivating to high standard
- Blast cleaning and polishing
- Welding
- Turning and milling
- Testing and mapping of electronic ignition
- In-depth knowledge of Japanese electrical systems
Every successful rewind starts with careful preparation. We meticulously strip the old windings and insulation, never making cuts in the stator or using blow lamps, as this will alter the magnetic properties and lead to failure or issues with ignition systems. Our process follows strict industry standards to preserve the stator’s integrity. The core is then inspected for dimensional accuracy before fresh base insulation is applied. Rewinding begins using high-grade copper, either by hand or machine depending on the application. We use only premium materials, all sourced from trusted UK or EU suppliers and chosen to meet or exceed OEM standards. We constantly look for ways to improve.
EXAMPLES OF OUR WORK
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, then metal cases are zinc plated. 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, leads and connectors.
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 sealed in to a replated case finished with new decals. New leads & connectors backed by a one year warranty
Suzuki GT750 fully restored rotor with new slip rings