Grey and Black-Faced instruments now available! Press here to go to Smiths Page

Smiths Instruments FAQ

...will they work on my bike?

The units will work on any machine with a 12v supply, and a conventional ignition coil for the tacho pick up. Please contact smiths@srmclassicbikes.com for specific bike and model advice

....what is a hall-effect sensor?

A simple electronic sensor that generates a pulse so the receiving unit can interpret the revolutions of the wheel or drive unit, just like on a bicycle speedo/computer

....how do I set the units for rpm?

The tacho comes pre-set for twin cylinder machines with simple setup procedure to enable the unit to be set for singles, triples, fours and six cylinder machines

.....and mileage?

The speedo can be set manually by using the wheel circumference or more conveniently, it has a "drive-to-set" mode, follow the simple instructions, simply ride the bike over a measured mile and the unit calibrates itself.

I need the later black faced version?

The black faced units and KMH versions of both styles  will be available before the end of the year, please keep checking the website for details

Copy version PRV's failing!

SRM products are frequently copied and we have found that there is a PRV available which looks very much like ours but unfortunately is failing under normal operational conditions!

We have invited some of the Classic-Bike media to test the valves independently to verify our findings

Owners are advised to be aware, if the PRV doesn't have SRM etched onto it then it isn't one of our trusted, proven PRVs!

 

News

We have recently refurbished our paint-shop facility offering a complete in-house solution for customers to achieve concours standard paint finish on their frame, tank and panels. Restoration to standard/original colour schemes or we can paint your tank to your specific design requirements!

We have also brought our cnc capability to exhaust thread repairs and can offer a very competitive rate for Norton and Triumph heads, refurbing to better than original!

Please phone or email for full details and pricing

 

Genuine UK made Smiths electronic Instruments

We have been working with Smiths Instruments to bring  electronic replicas of the original Smiths mechanical speedos and tachos back to the classic market. The units will be available in grey and black faces along with KMH options for the speedos.

 

The tacho is wired into the switched side of the ignition coil circuit and has programmable options from single to six cylinders.

The Speedo uses a "dummy cable" style sensor (available from SRM) and has a very handy "Drive to set" function that makes the unit extremely easy to set up, simply driving the bike over a measured mile or kilometer, depending on the requirement.

The units will work on positive, as well as negative earth systems. During development we have found that some positive earth bikes produce a lot of electrical "noise" that may in some cases effect the speedo, so we will also be offering a simple module that allows these few cases to run the units without issue. The extra benefit of the module is that it will also allow owners to use low consumption, conventional negative earth devices (such as sat-nav) on their machines!

More info soon! See the FAQ section on the left