Inductive Discharge Electronic Ignitions sytems for motor bikes, has anybody fitted one to a 4 cylinder bike.?

Question

I have rebuilt a 1978. Suzuki 550 .G.S. motorcycle, which contains 2 ignition coils , which feed the four cylinders in its firing order.

Its distributor consists of Two sets of points.

The bike is a bit ruff at starting: and I have contemplated fitting a points assisted Electronic system to boost up the sparks in my Plugs.
I did think I was getting Voltage drop ; at first. but I have checked this with a volt-meter... and my supply to the plugs is reading 11 volts, however only two plugs are firing : as I checked them by substituting
4 separate spark plugs and earthing them, then cranked the engine over on the starter button.

I have at my disposal: 2 brand new Spark-rite 2000 systems, and a Boyer Bransden system, === both are Inductive discharge Ignition boosters.

Any comments would be graciously appreciated. by World Traveller.

aka [e-mail]

Answer 1

I grew up with points systems and know that just a tiny bit of crud between them will render them inoperative. After you have them adjusted, take a piece of heavy paper like a business card and with the points closed, put the paper between the points and drag it out. Do this until the paper comes out clean. If the points are old and the bike was setting around for some time, file the points first because sometimes an imperceptible layer of corrosion will form beween them. In lieu of a points file, fold over some 150-200 sandpaper and pull that through the closed points.



You also need to find out if it's the points or coils. To do so, just swap the - wires on the coils and crank if over. Actually you don't even have to crank if over, have the ignition on, the points closed and with a screwdriver, open and close the points and the plugs should fire. Coils seldom fail completely dead, usually they'll start with high speed missing and then go on to refusing to start even though they will produce a small spark when the plug is out of the engine.



The present ignition system should be adequate but if oyu want more power, go to replacement coils like Dyna or Nology. If they're 2.5 ohm coils you won't need any resistor, if less you will. If you have the room to fit them, dual lead coils from 80's-90's GM vehicles will work well. They have .9 ohm primary resistance, so you'll have to us the appropriate resistor.

Answer 2

Not a bad system for points this one,Purely from a cash point of view,and assuming you completely changed over the coils and it still didn't work,I'd start by fitting a new set of points condensers and especially new resistor plug caps (NJK for preference).I'd get the bike running as spec before throwing cash at a possible fault,it may be aggravated by something else.Once running check the valve clearances (cold),then balanced the carbs.This should have it sweet as a nut.If at that point you decide for the ignition mod's then you'll know they are worth it.One final fault on these is the carb inlet rubbers,notorious for giving weired starting/running faults,any cracks or holes,replace them.

Answer 3

there have been various 4 cylinder British motorcycles. A Google seek will supply you particular information. The Triumph 1200 and the in no way produced Quadrant have been 4 cylinders. The 600, in spite of the shown fact that, is a twin (2 cylinder). They do have the favourite-day 675 it particularly is a three cylinder. And, Triumph makes better than in simple terms 3 cylinder motorcycles, they nevertheless make the paralell twin Bonnie and Thruxton, possibly extra.

Answer 4

If only two plugs are fireing you will have to get a new set of points, but first just test all the leads for continuity(Make sutre thay all conduct)

Have tried cleaning the contact points too.

Answer 5

we can do it because it is possible..