More SF2 questions-sorry!

eyeguy

eyeguy

Junior member
Location
London- where the streets are paved with gold
Chaps, more, I'm afraid

The great disassembly has begun. Although it runs/ran, the wiring is in a bit of a sad state. The starter button, for example, is an Aprilia affair with a toggle switch, bound to the handlebars with ancient zinc tape!
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Is this original fitment? If so, it looks buggered, do I try to save it, or just fit something pattern, and from whom? Presumably its one wire in and one out, not a press to earth switch?

Then, there's under the tank, arghh!
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We have a pair of the world's biggest coils and a reg/rec that looks like it came off a WW2 bomber.  Should I just junk all this and fit a modern unit? again, if so what would you suggest? I'm not after a 100% resto, I like actually riding my bikes and do so everyday, so working properly is the priority!
Thanks again, sorry to be a pain with so many questions.

Finally, it looks like we might go electronic ignition sooner rather than later, what would you suggest.

Cheers

ATG

paul
 
Paul, that doesn?t look like it needs more than a tidy up. The regulator must be the same as you had on your other SF. You cannot avoid it if you keep the DC generator as I am pretty sure solid state won?t work. As long as it charges ok it is a bulletproof system. Mine still work after constant use since new as do the huge Bosch coils.
Where are all your cable junctions? On an SF2 they were above the battery, and on an SF1 were behind the front of the fuel tank.
The original throttle on an SF2 was ND as used on various Suz models and was used widely on all Laverdas from ?74 on and have been discussed much on the forum. They have ignition cutout switch and yes the wire from the start button feeds power to the starter relay. Your Tommaselli throttle is as from an SF1 but they were twin cable. The Suz throttle needs almost two handfuls for full throttle though. I use a quarter turn Magura throttle fitted inside a carved out Suz housing (for the switches), and cut down slide springs in the carbs.
Lee
 
Hi Paul,

I am pleased with the Newtronic ignition I fitted to mySF2 several years ago; it does however mean you need to keep the mechanical advance/retard unit. Price was very reasonable.

Andrew.
 
hi
i had a newtronic fitted to my 1978 gs750 suzuki,it was a good ignition,unfortunately the black box went down and they no longer made one for the 750gs,i changed to a boyer micro digital and it just does not work as good.my rgs is running a sasche unit and is very good.
neale
 
Sachse not only supplies good ignitions, he also makes Rec/reg units to suit your bike. http://www.elektronik-sachse.de/index_en.htm click on LAVERDA at the top right and then click on what ever you need on the left side. He sells internationally.
 
You effing beauty Lothar. We?ve discussed this before and it seemed that electronic was impossible for the DC genny. I wonder how he has done it as nobody could before. Bloody cheap too and tiny. Do you know how well they work in practice?
Cheers
Lee
 
you are indeed an effing beauty, Lothar!

The lav is currently in 'full speed apart' mode and I have a man who knows wire coming in tonight to look at the setup. As it was running I think I'll get it back to working status, buy and shelf the electronic setup for a few weeks and then fit it (well, get him to!)

Not sure I'll bother with a ?80 crappy Suzuki throttle, might just fit a twin pull Tommaselli, I think and retain the jab button sans sticking plaster ::)

Fantastic, guys, thank you very much.

ATG
Paul

 
Having looked at "the button" it might be a dip and horn from an old machine, I seem to remember my C15 having one.

Andy
 
Tippie said:
You effing beauty Lothar. We?ve discussed this before and it seemed that electronic was impossible for the DC genny. I wonder how he has done it as nobody could before. Bloody cheap too and tiny. Do you know how well they work in practice?
Cheers
Lee
Click to expand...

Hi Lee,

think he is quite clever about electronics. Don't see why electronic could not do what electric components do. A the end one is a mechanical and one an electronic regulation, both doing the same job...

I have no first hand experience with one of his units (neither ignition nor regulators), but as far as the responses from users are, they are all positive.

HTH
 
I'm very impressed with the Sachse ignitions [I'm about to order my second unit from him for my spare engine]. Volker speaks good english , answers emails promptly and provides excellent back up support. Can't really ask for more than that :D
 
Hi Paul,
The switch is wrong for the SF2, the ND item is correct.
You can also get away with Zane model switch and throttle unit if you are prepared to modify thewiring a little.
Not some SF2 models also have the main wiring connections under the tank alongside the front ignition coil.
I think that early GTs used a starter switch similar to that shown in the photo.  Pattern oval shape switches are still available, try Laverda Paradise.
Take care with electronic ignition, I fitted a Boyer unit not realising that there is only 10 degrees of advance available, result new starter free wheel required.
Good luck,

John E :D
 
Pauol,
show us a wide view of the whole bike,we can probably help you a lot more if we can see the whole thing as one.
CLEM
 
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