Rex’s Technical Support

Welcome to our technical help page where the latest versions of our fitting guides, testing procedures, wiring diagrams and other useful guides can be downloaded free of charge. Please be aware that we are a small team of technical specialists and during the warmer months we are often fully booked.  If you need advice please e-mail the tech team who will answer as time, and the person with the best skill set for your issue becomes available. To ensure consistent work flow the technical team have a daily diary of work and will answer e-mails during allotted consultation periods. If you have an urgent enquiry please book a slot to have a technician look at the issue.

Every customer is a priority customer, so we thank you for your patience in advance while we work through jobs in hand.

Automotive electronic components, once professionally repaired and tested must only be fitted and adjusted by suitably skilled personnel. Correct installation and adjustment requires in-depth technical knowledge, the correct tools and a correctly functioning vehicle system in which the overhauled part is fitted.

Troubleshooting your motorcycle, fitting of parts and re-testing of parts supplied as serviceable is not included in the purchase price and we reserve the right to charge for this additional service. We would also like to remind customers that we are not responsible for misdiagnosis of vehicle systems. 

We encourage customers to  read thoroughly the machine’s workshop manuals, and to read our advice sheets, guides and fitting information, these are provided free of charge to download. These  are intended to assist, putting customers in charge of their troubleshooting. If you lack the experience necessary we strongly recommend that you consult a professional mechanic of your choice.

Yamaha XS650

Charging System Checks

Tri-Spark

Trouble Shooting CDi Ignition

Honda Ignition Testing Guide

Kawasaki Ignition Testing Guides

Suzuki Ignition Testing Guides

Rotax 348, 504 & 604 Ignition Testing Guide

Yamaha Ignition Testing Guides

Source Coil Fitting Guides

Lighting Coil Fitting Guides

Charge Warning Indicator Wiring Guides

Ignition Coil Wiring Guides

RMK Electronic Ignition Kit Fitting Guides

Yamaha TT500 Adding Lighting For Road Use

12 Volt Conversions

Armstrong MT500 Generator Up-grade

Regulator Rectifier Wiring Guides

Fitting An AC Regulator

Stator Fitting Guides (Where Different from Shop Manual)

Wiring Loom Fitting Guides

Miscellaneous Connection Guides

Solid State Voltage Regulators for British Motorcycles

Rex's Lucas Dynamo Guide

Lucas Wiring Harness Diagrams

Lucas Rita AB5 | AB11 Technical Help & Information

Lucas RM Motorcycle Alternator Guide

Vintage Lucas Shop Manuals

External HT Coil Conversion - Magnetos

How to Set 2-Stroke Electronic Ignition Kits

Indicator Fixes & Wiring

Simplified Motorcycle Wiring Diagrams

Battery Fitting Guides & Information

Carburettor Set Up & Tuning Guides

Headlamp Booster Kits

Pazon Ignition Fitting Guides