My V65 GT has had a Newtronic ignition system fitted at some stage in its life and I was wondering if anyone has the fitting instructions for that system, failing that, does anyone know which sensor fires which cylinder. I’m pretty sure that with the original system, whatever that was, the left fired the left and the right fired the right, is the Newtronic the same ?
Thanks,
That’s an optical system is it not? try putting a bit of paper between the each pair and see which pot cuts out.
That’s my plan later today after brekkie.
Yesterday I was trying to describe how you ought to be able to figure it out by comparing the angles between the two sensors, but couldn’t do it, still can’t … Needs a picture …
Easy enough to find out. Ignition on, then with the plug caps off and a spare plug inserted into each cap and then grounded I was able to see which side sparked as I waved a small piece of plastic in between the two halves of each sensor. Problem now is that both mounting lugs on one of the sensors have broken off, just sitting here waiting for some araldite to dry as I try and build up a couple of lugs, I’m not too hopeful so it may be that I have to email the present manufacturers of Newtronic and see if they will sell me a couple of sensors.
I’ve got a set of instructions for the big twin Newtronic set up. I’m not sure if it’s the same as the one you have.
All done now thanks, still not sure if Aradite is going to be OK for the repaired mounting lugs, time will tell, I’ll use it for work tomorrow and see what happens.
Keep an eye on it because I’ve had Araldite melt. I’ve read that the location of the V50 and its ilk contact breakers area can be particularly hot. (?)
There is a heat resistant araldite type epoxy as it is used on the coils of a hot water cistern
Apparently there is a heat resistant Araldite!! Shows what I know about it OK rephrased comment ~ the ornary Araldite might melt …
Well, as correctly forecast the araldite softened with the heat so it’s back to square one. I emailed the support people of the present owners of Newtronics to see if I could buy a couple of sensors but I’ve had no reply. The annoying thing is that I gave away a complete working system, exactly the same as I have now, a few years ago and what makes it more annoying is the fact that it was never used, I even paid the postage to Oz
!
So I’m going to do what any self respecting Guzzi owner would do and that is make a new holder for the sensor from a piece of Acetal sheet. I did a dummy run with a small piece of aluminium and it worked out fine, I won’t use the aluminium one as it will be too easy to short out the fine wires that connect the sensors, just have to wait untill the Acetal arrives. Unless of course anyone has a Newtronic/Piranha pickup gathering dust that they would like to sell.
Damn I hate being right Sounds like a better plan anyhoo
Well still no reply from Newtronic so I’m going to look for a new lamp-holder/sensor inside this big piece of Acetal/Delrin.
I cut about 20mm off the end and using these tools I found it.
A couple of hours with my milling machine and soldering iron and there it is.
It’s still got a bit excess Silicone RTV on it as that’s what I’m using to insulate the fine wires but it works as when I pass an obstruction between the lamp and sensor I get a nice big fat spark.
Mind you, credit where credit is due, the system has been in for a long time and it’s provided excellent service so with this repair it should last a lot longer.