Welcome to the Strathpeffer Junction shop. UK shipping for OO Gauge ringfield adaptor kit orders is £2.99, irrespective of how many are purchased. We also ship to Ireland, mainland Europe, USA, Canada, Australia and New Zealand.

+ Covid-19/Coronavirus +

Whilst I have good stock levels for most motor kit components, some motor shipments from my suppliers are affected by events in China (and now globally). Out of stock kits will be restocked as soon as possible, but I may not be able to provide a specific timescale. Please subscribe to updates for out of stock products (on each product's listing page) and you'll get an email notification as soon as new stock is added.

My wife is also pregnant and in the government-defined more vulnerable group, so I have had to amend my shipping days to reduce the amount of contact that we have with public spaces. For orders that are placed via my website, and until the national picture is clearer, I will ship these at mid-day each Tuesday and, where possible, Friday. Please rest assured that orders will be shipped as soon as they can be, but it may take a day or two longer than normal.

Thank you for your understanding and support. Stay well.

Lima Ringfield Replacement 6V CD Motor & Adaptor Kit (LA2/12MM/Bo-Bo)

(2 customer reviews)


Only 5 left in stock


A brand new OO Gauge Lima ringfield motor conversion kit, comprising:

    • a replacement 12mm thick 6Vdc high torque 6V can motor,
    • computer-designed 3D-printed adaptor,
    • 2 x 8-tooth gears (one spare),and
    • a length of heat shrink tubing.

This kit requires no permanent adaptation to be made to the motor bogie and therefore the original ringfield (pancake) motor can be reinstalled at any time; the motor, adaptor and/or gear can be replaced with ease, if ever the need arises.

Read more about our ringfield adaptor kits here: www.strathpefferjunction.com/ringfieldadaptors


We have tested the adaptor in UK outline models marked with an asterisk below. Based on visual assessment, this adaptor should also work with all ringfield models listed. Very occasionally, light sanding may be required around the lugs to ensure clearance.

Class 26*
Class 27*
Class 33*
Class 42 (Warships)*
Class 43 (HST)*
Class 73*
Class 87
Class 101*
Class 117*
Class 121 *
Class 156
Class 373 (Eurostar)
Class 960 Sandite Unit*
GWR Railcar*
0-4-0 (Diesel & Steam)

★ For our 12Vdc 12mm/Bo-Bo Lima adaptors, please click here.
★ For our 10mm/Co-Co Lima adaptors, please click here.
★ For our Small Loco Lima adaptors (suitable for Class 08/09 shunters and GWR Prairie), please click here.


We can accept no liability or responsibility for any damage or injury occurring from the installation and use of our motor replacement kits. Installation requires modifications and the use of tools, some of which have the potential to damage you and/or you models, as well as other components and equipment. Users must not commence work unless they are confident that they have the skills and experience necessary to complete it successfully, and install these kits and undertake work to their models at their own risk.

Additional information

Weight 29 g

Usage Advice

1.  Our replacement motors are low-noise DC motors designed for CD/DVD drives. The output from a DCC decoder or a DC controller can exceed their voltage rating depending on how hard hard the loco is being worked. Whilst our own tests (and those of many others before us) show that these motors are capable of handling voltages higher than their rating, in order to avoid motor burn-out, prolong motor life and achieve prototypical speeds, we recommend:

    • For DC/Analogue use, speeds are kept low manually via the controller and a diode* voltage dropper should be considered in order to reduce voltage going to the motor (as outlined in the instructions);
    • For DCC use, speeds are kept low manually via the controller, decoders should have their CV5 value reduced (if available) and, particularly where CV5 adjustment is not available, a diode* voltage dropper should be considered in order to reduce voltage going to the motor (as outlined in the instructions).

2.  With all CD-style motor conversions, it is good practice to: i) maintain very high speeds for relatively short periods only, ii) keep running on steep inclines to a minimum, iii)  avoid coupled up with excessively long rakes of coaches/wagons, and iv) where less robust 10mm motors are fitted, resist the temptation to fit additional weight to the loco.

3.  It is recommended that locomotives fitted with our 3D printed adaptor kits are not run for more than an hour continuously; this is to prevent the motor temperature from exceeding the glass transition temperature of the plastic.

4. We recommend that locomotives fitted with can-style CD motors are:

    • Not run without a DCC decoder as ‘Locomotive 0’ on a DCC model railway layout (this is will lead to over-heating and rapidly ruin the motor), and
    • Not placed on the tracks whilst a high frequency track cleaner (such as the Gaugemaster HF-1/HF-2)  is in operation. There have been some reports that the frequency can damage the motors, although it is not something that we have tested.


The following instruction manuals are available for this product:


Instructions for 10mm & 12mm Lima Ringfield Motor Upgrade Kits (LA1, LA2 & LA6) 442.11 KB 809 downloads

Step-by-step instructions for our LA1, LA2 & LA6 Lima ringfield motor upgrade...

Lima Replacement Motor Kits Troubleshooting Guidance (OO/HO) 276.46 KB 188 downloads

We have prepared a troubleshooting guide to address some of the rare, but potential...

Ringfield Motor Upgrade Kit Label 1.65 MB 200 downloads

Product label. ...

Ringfield Motor Upgrade Kit Product Leaflet & Advice 4.60 MB 200 downloads

Product overview and usage advice. Last revised: 24 March 2020. ...

2 reviews for Lima Ringfield Replacement 6V CD Motor & Adaptor Kit (LA2/12MM/Bo-Bo)

5 star
4 star
3 star
2 star
1 star
  1. Robert Cockburn (verified owner)

    Verified reviewVerified review - view originalExternal link

    I bought one of the thinner LA1 kits for my Lima Class 37 last week and was really pleased with it so i decided to convert my HST set as well using one of these 12mm kits. They’re so simple to use and now the HST set is flying around my layout far smoother and quieter than it was before. This is a great product and David has been extremely helpful when I had a couple of questions. .I’m now considering converting my other Lima locos.

    1 out of 1 people found this helpful. Was this review helpful to you?
  2. Liam Taylor-Warren (verified owner)

    Verified reviewVerified review - view originalExternal link

    The motor I installed into my Class 43 did burn out after four days… But- I was asking a lot from it given given I run a large model railway with trains going around for seven hours a day and it was a full length HST!. Happily brought a new one this evening and will look at adding diodes as suggested. When it was installed in the 43 I had silky smooth running and virtually no noise. Again, a quality bit of kit!

    1 out of 1 people found this helpful. Was this review helpful to you?
    • Strathpeffer Junction (store manager)

      Firstly, many thanks for the 5 star rating. We’re really glad to hear that the kit was simple to install and ran smoothly at first. Please drop us a line and we’ll gladly sort out a replacement motor for you. Just to clarify, motor burn out is, unfortunately, a possibility with constant running. We don’t generally recommend that CD-style motors (whether included in our kits or those purchased elsewhere) are used in models that will see more than a hour’s constant use at a time and/or are worked hard with lots of inclines or long rakes.

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