Lucas flasher relay and fitting Lucas turn signals

TeddyG

TeddyG

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Portland Oregon
I'd like to fit Lucas turn signals on my 750 that came w/ none. When I depress the turn signal to the right a chirping sound comes from the flasher relay but is quiet when turned to the left, so I'm thinking it needs replacement. Will a generic flasher relay work or does it need to be this exact part number? What is the flash rate on this relay? I tested a spare turn signal to the green and black grounding wire and it only turned on w/ no blinking.
Advise/info is welcomed thank you
 

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Paul will be appalled because I'm about to recommend a solid state relay instead of that 'orrible electromechanical one.
Get yourself a Kellerman Relay.
It takes up less space in that crowded headlamp shell.
It gives a solid, reliable flash rate.
It allows you to use LED Indicator bulbs: brighter and clearer signals to others, though you don't have to do it straight away.

Kellerman Flasher Unit.jpgKellerman Relay.jpg
 
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Or you can buy replacement Lucas flasher units of the same type you have already, just google the part no and type,that's what I did :giggle:
still used by many classic cars and me!

Your choice(y)
 
Any flasher relay from an auto parts joint or a moto wrecker will work - with the electromag ones you need the correct wattage bulbs to get a good flash rate (if one bulb fails it will illuminate the good one but won't flash at all). I think my Lucas unit in the SF1 was chucked in about 1975. The beauty of a modern electronic one is that it flashes at the same rate regardless of wattage or type (LED or incandescent). Weird that yours works one way but not the other??? Maybe there's a short in the right circuit?
 
The Sock said:
Paul will be appalled because I'm about to recommend a solid state relay instead of that 'orrible electromechanical one.
Get yourself a Kellerman Relay.
It takes up less space in that crowded headlamp shell.
It gives a solid, reliable flash rate.
It allows you to use LED Indicator bulbs: brighter and clearer signals to others, though you don't have to do it straight away.

View attachment 89395View attachment 89396
Click to expand...
Fully agree.

Independant of differing wattages and more reliable than analog flasher units. With a correct resistor fitted inline, they cater for LED indicators just fine. Personally, I've gone to Motogadget units, they also offer a brake light flasher that can also be used as a regular flasher (not at the same time though!). Brake light flasher could be useful here and there, if allowed by local DOT/TÜV/MOT, etc. regulations.

piet
 
I'm a little intrigued why you want to put Lucas indicators on a bike that probably came originally with CEV units.

My original 15,000 series SF2 came with rounded back CEV blinkers back in June 74 here in AUS.
A style of CEV blinker that disappeared fairly quickly, replaced by the style you now can buy.
Also, the flasher unit was mounted under the lhs side cover, not in the headlight.

IMHO, the Lucas indicators look fine on an SF or SF1, but way out of place on an SF2 or 3. Just my 2 cents worth.

And just in case you think I'm a rivet counter, I am, BUT, when it comes to electrics, I rewire all my own renovations using the Motogadget control unit. Far, far simpler, no wires running 10 of metres along the bike with the attendant volt drop, and very few joints (preferably none) hidden away in in wiring loom covers (spaghetti}. I simply hate chasing wiring faults in wiring looms.
 
Thanks guys,

I didn't realize there's a difference between the 2 turn signals and I just want some decent looking turn signals. I'll investigate the wiring to the flasher relay which is conveniently mounted near the battery. I've installed a Sylvania LED headlight bulb w/ built in resistor and fan for no flickering.

My other question is whether turn signals normally have one wire or 2 w/ a grounding wire (like my existing green and black). The bike came to me w/ no signals.
 

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DavidH said:
I'm a little intrigued why you want to put Lucas indicators on a bike that probably came originally with CEV units.

My original 15,000 series SF2 came with rounded back CEV blinkers back in June 74 here in AUS.
A style of CEV blinker that disappeared fairly quickly, replaced by the style you now can buy.
Also, the flasher unit was mounted under the lhs side cover, not in the headlight.

IMHO, the Lucas indicators look fine on an SF or SF1, but way out of place on an SF2 or 3. Just my 2 cents worth.

And just in case you think I'm a rivet counter, I am, BUT, when it comes to electrics, I rewire all my own renovations using the Motogadget control unit. Far, far simpler, no wires running 10 of metres along the bike with the attendant volt drop, and very few joints (preferably none) hidden away in in wiring loom covers (spaghetti}. I simply hate chasing wiring faults in wiring looms.
Click to expand...
Not all markets recieved indicators, that was often up to the importer. UK importers would obviously fit Lucas stuff. Probably also the reason no indicators or flasher units are to be found in the 750 GT-SF1/2/3 parts books. Neither the GT nor SF were even equipped with a flasher switch until the Lucas handlebar switches were introduced! First (only?) 750 always with indicators ex-factory was the GTL. Quite possible that the Oz importer fitted the "wrong" CEV indicators.

Imho, the Motogadget control unit doesn't save much wiring, just concentrates most of the connections at the unit, still got to run wires to and from all switches though. It seems the currently available mo.units no longer have a starter relay either.

Making looms with fewer connections isn't difficult. When the time for disassembly comes, for whatever reason, it shows if a particular connection should better have been included... ;)

piet
 
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