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Ah - the days of wishing they made rubber valve cover gaskets, not the crap cork ones, feeler gauge in hand.

Liked to set mine hot - didn't like getting burned but the price U pay.

At least the mag was easy to do - remember using a dwell meter ? 555

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2 hours ago, thaiguzzi said:

I dunno how they handled well, but they did.

The headstock is almost Honda Wave/Cub/Dream in its non existence of support.

Not even a head steady - c/head to headstock...

Dwell meters - blimey.

Light bulb & crocodile clip.

But my favourite, to which i still use to this day is a cigarette paper.

EFI, electronic ignition only, young, modern boys, have not got a clue to what i'm on about.

Apart from him being a bit of a short arse and i'm not, that pic relays the Suzuki TL 1000 story i told a few pages back...

 

Nice.

07_08_2013_medaza_ducafe_ducati_011.jpg.6f758bf2dbf9283fe232cad23acfeee9.jpg

 

Oh yes, setting the points with cigarette paper, done many times! Oh happy days........????

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4 hours ago, thaiguzzi said:

I dunno how they handled well, but they did.

The headstock is almost Honda Wave/Cub/Dream in its non existence of support.

Not even a head steady - c/head to headstock...

Yep looking at one you'd think " nah " but they manage to keep it together .. Here's another .. 

 

IMG_20190318_191154.jpg

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2 hours ago, Damrongsak said:

I dimly recall dwell meters, though I don't know how they work. 

Measure the degrees of rotation of the points cam. This allows proper time for the coil windings to become charged. Points gap with a feeler gauge replicates this, as the only time the coil can store energy is when the points are open.

Memory serves - 30 to 35 degrees was about right.

Now, as a man who never lubricates anything, I need to go out and smear grease on my tires. This decreases friction so the tires last longer !!!

555

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5 hours ago, Damrongsak said:

Pot-heads and old fashioned machinists can tell you about the relative thickness of various cigarette papers. An old man at my workplace in Thailand just rolled his cigarettes with banana leaves.  Cool old guy. 

The thinner the cigarette paper, the more accurate you are when checking the point at which the points are JUST OPENING.

Green/Red Rizlas are a thou (0.001").

Best.

Blue Rizlas can be as little as 0.0006-0.0007" (just over half a thou) but they tear too easily...

5 hours ago, Damrongsak said:

papa has used the cardboard wrapper of cig papers to set points,

but the paper itself is so so thin....

If you are checking the gap, then you want feeler gauges.

9.-Blue-Bike-Marty-Dickerson-1953-Vincent-Vintagent.jpg.ab6fb267e1e438a199c65cf2a6789d24.jpg

 

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7 hours ago, canthai55 said:

Points gap with a feeler gauge replicates this, as the only time the coil can store energy is when the points are open.

..and I always thought the points are closed so the coil can be charged. The sudden opening of the points causes the voltage to drop off dramatically and in turn generates back emf of a higher voltage. This is transformed by the coil into a higher voltage which jumps across the plug gap. The condenser/capacitor is there to slow down slightly the discharge across the points to prevent arcing.

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3 minutes ago, VocalNeal said:

..and I always thought the points are closed so the coil can be charged. The sudden opening of the points causes the voltage to drop off dramatically and in turn generates back emf of a higher voltage. This is transformed by the coil into a higher voltage which jumps across the plug gap. The condenser/capacitor is there to slow down slightly the discharge across the points to prevent arcing.

When the points are closed, the current flows through the primary windings of the ignition coil and generates a magnetic field.  When the points open, the current suddenly stops flowing, the field collapses very rapidly, and a current is induced in the secondary windings, which have far more coils than the primary, acting like a step up transformer.  The high voltage generated is then sent to the correct spark plug via the distributor.

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45 minutes ago, VocalNeal said:

..and I always thought the points are closed so the coil can be charged. The sudden opening of the points causes the voltage to drop off dramatically and in turn generates back emf of a higher voltage. This is transformed by the coil into a higher voltage which jumps across the plug gap. The condenser/capacitor is there to slow down slightly the discharge across the points to prevent arcing.

Apologies - I posted it bass ackwards

Coil builds when points closed, when open ground is severed, so goes thru the coil wire to spark plug, jumps the gap, and grounds thru the side electrode.

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One of the most efficient forms of I C engine ignition is the COP or coil on plug .. Lift the bonnet on most modern cars and if , if you can see past all the fairings and covers that modern engines are garbed in the chances are it'll have this type of setup where each pot has its own coil sat directly atop the plug with a couple of wires into the engine loom for input from the processor and timing eye .. Numerous advantages that can only come from a system with few moving parts , reliable , capability to alter the whole spark map and considerably higher KV resulting in a more powerful spark promoting a more efficient burn especially in direct injection pet' engines .. Just don't touch 'em when the engine's running .. Kawasaki were first to fit CDI systems on the first of the 500 triples though it weren't perfect so they went back to points for a couple of years before going electronic again with same system that appeared on new 750 '72'ish .. 

 

IMG_20190319_071959.jpg

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