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Helping keep British Motorcycles on the road for over 30 years - established 1977


Part Number 332-106

The ideal companion for a Tri-Spark electronic ignition.

This one unit will work on both single phase and three phase alternators, so on all 2 and 3 wire stators. Great if replacing diode and rectifier or old single phase powerbox now, but not ready to upgrade stator to 3 phase.

>>>> Install Instructions <<<<

These voltage regulators use the latest MOSFET technology for cool running reliability. Unlike the previous generation of regulators that waste power and run hot these MOSFET regulators will impress the most discerning buyer.

Generous 20 amp rating exceeds the requirements of 10 amp, 16 amp and 14.5 amp two and three wire stators commonly used on British bikes. Heavier wire connections are extra long (60 cm) in two sleeves so you can route the wires and connect them exactly as you wish. Smaller in size makes fitting possible in tight locations under the seat or behind side panels. Cool running so you can hide it away!

Why muck around with hot unreliable regulators that waste over 20 watts of precious power when you can have the latest!

Suitable for use with 2 and 3 wire stators (single and three phase). 10 amp single phase, 16 amp single phase and 14.5 amp three phase. These stators are commonly known as RM21, RM23 and RM24 used on Triumph, Norton, BSA , Enfield, Matchless etc.. .compatible with any single or three phase permanent magnet 12 volt alternator up to 20 amps.

Whether you are replacing the original equipment plate rectifier and zener diode or upgrading an older reg. this one will tick all the boxes! With wiring instructions and covered by a 2 year warranty.

Size is 80 x 67 x 20 mm. Mounting hole centres 64mm. Check out the video below where conventional diode voltage regulators are compared with the MOSFET voltage regulator.