Triumphrat

tommytiger

I was intrigued to see how the points set up on my was behaving so I have splashed out on a strobe light, it's an 'accuspark' , under £14 from fleabay and I can say I am very impressed by it!

It has revealed a few things to me,

1. My timing which I set statically is spot on where I thought it should be (about 36BTDC fully advanced to help it cope with modern fuels.
2. The AAU is working perfectly.
3. Both cylinders are firing at the correct time relative to each other.
4. I appear to have a little misfire on my left cylinder!!!!

The bike starts and ticks over well but when I checked the timing I I held the rpm at around 3000rpm and noticed that every 3 or 4 seconds on the left cylinder the timing 'jumped' a little and this coincided with a little faint misfire noise from the exhaust so little I'd not really noticed before, it was only the light that highlighted it to me.

I'm thinking, clean the point, and then start swapping ignition components until the fault transfers to the other side?

The plugs and leads are nearly new so I'm suspecting the condensor or coil.

Morris the Cat

Make sure your not using the bikes battery for this test!

This is rule # 1 in the Triumph bible, at least it was when these were new.


Don't know what happens if you break the rule though. . .

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Morris of Main Street

Mr.Pete

Try swapping the spark plugs.A bad plug will do that.

Old Cafe Racer

My vane VT-440 timing light won't work unless I use the bikes battery.
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Morris the Cat

Try a different timing light then?

not sure what that is?

Google no help. . .

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Morris of Main Street

Old Cafe Racer

Why would I try a different timing light when the one I have works perfectly as designed on the vehicles own battery?
A modern strobe has a power smoothing input circuit which filters any AC pulses from the input power supply.
Those instructions were written a long time ago I would suggest.

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