TS Mirage coils

I'd stay away from Chinese items which I suspect is what the ebay link are.
As has been posted here many times, if you want to keep costs down, find some used TEK coils (KP03/MP08 (twin outlet)/MP06...) which work perfectly well. Make sure you buy them with the old HT leads attached - you need the rubber grommet/seal which anchors your new copper core silicon rubber HT leads.
NGK suppressed caps work fine but are becoming hard to find - part no VB05F (angled) SD05F (straight).

Generally the OE Nippon Denso (cream coloured) coils go on forever....
 
Pompey guy said:
I would like to replace my coils, leads and spark plug caps, what are the recommendations? Thanks.
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Why, Ignition coils do not have a lifespan and wear out over time? It is made of copper wire that is already billions of years old. Unless you have Motoplat coils which I have seen fail, there is no advantage with new coils. If you are determined to replace the coils, the TEK coils fitted to many Japanese bikes are a good choice.

Regardless of claims made by modern performance ignition coil manufactures that defy all laws of physics and can make a trillion volt spark that can jump a 10 foot spark gap, save your money.

Have you ever seen an owners manual for a car or motorcycle that says at 20,000 miles you need to replace the ignition coil as normal maintenance? I have a 1953 Chevrolet car with the original 73 year old ignition coil that has 465,000 miles on it and it still works perfect.

Ignition wires and the resistor plug caps, yes they need to be replaced as they do wear out.
 
1200ts said:
Why, Ignition coils do not have a lifespan and wear out over time? It is made of copper wire that is already billions of years old. Unless you have Motoplat coils which I have seen fail, there is no advantage with new coils. If you are determined to replace the coils, the TEK coils fitted to many Japanese bikes are a good choice.

Regardless of claims made by modern performance ignition coil manufactures that defy all laws of physics and can make a trillion volt spark that can jump a 10 foot spark gap, save your money.

Have you ever seen an owners manual for a car or motorcycle that says at 20,000 miles you need to replace the ignition coil as normal maintenance? I have a 1953 Chevrolet car with the original 73 year old ignition coil that has 465,000 miles on it and it still works perfect.

Ignition wires and the resistor plug caps, yes they need to be replaced as they do wear out.
Click to expand...
Trouble is the coils are sealed, so I can't replace the leads
 
TEK KP03 single coil from Kwaker 250 etc., MP08 twin coil from various Honda and other Jap bikes.
Both coils have around 3 Ohm primary resistance.
Make sure screw caps and rubber lead seals are present.

Gerald
 
1200ts said:
Why, Ignition coils do not have a lifespan and wear out over time? It is made of copper wire that is already billions of years old. Unless you have Motoplat coils which I have seen fail, there is no advantage with new coils. If you are determined to replace the coils, the TEK coils fitted to many Japanese bikes are a good choice.

Regardless of claims made by modern performance ignition coil manufactures that defy all laws of physics and can make a trillion volt spark that can jump a 10 foot spark gap, save your money.

Have you ever seen an owners manual for a car or motorcycle that says at 20,000 miles you need to replace the ignition coil as normal maintenance? I have a 1953 Chevrolet car with the original 73 year old ignition coil that has 465,000 miles on it and it still works perfect.

Ignition wires and the resistor plug caps, yes they need to be replaced as they do wear out.
Click to expand...
Coils can break down but not because the copper windings wearing but the resin encapsulation of those windings can degrade causing the coil to be break down by overheating caused by short circuiting.
 
...while there are cases of specific coil failures, certain brands like ND ( pinky coloured ones ) and the TEK are in a class of quality that defies a general comment of proneness to failure. Not seen a failed ND ( came on my bought new 1973 Suzuki GT750K ) or a failed TEK yet, and have seen well above the usual exposure to coils and potential issue as root cause of ignition trouble. Aligned to Bruce in many matters, this is also one such assessment that i agree with.

As for impregnation used in wound items, vacuum wax impregnation is the preferred process in and of the era. Shellac as another, though not as common. For wound coils the most vulnerable section is the adjacent interwinding insulation of the enameled ( single and double ) copper wire. Abrasion from magnetostriction one such mode of failure onset. Hence wax to prevent the windings vibrating against one another. Abrading the enamel causing shorted turn. Another susceptible manufacturing process, lead in and lead out terminations, gets complex.

A big no no is to have the HT lead open circuit, causes high voltage standing waves reflecting back into the secondary winding and most important the primary, in turn nuking the driving semiconductors as a risk or worse reducing the life expectancy ( though points are not so vulnerable ) of the semi's.

Never ever been convinced of the worth for exotic coils on older engines, though there are believers here that attest that at certain motor operations the exotic ( mostly price exotic ) coils have merit. Ramble yes... history yes again, relevance... for the reader to consider. Never paid more than $10-25 for a coil, all used. HTH, j.
 
"Trouble is the coils are sealed, so I can't replace the leads"

The beige coloured ND coils are the absolute business, you can find the double ones on Suzuki GS1000 but if you buy, be carefull that they are original ND and not later fitted aftermarket types, the shape and colour usually defines, the single coil can be found (in multiples of threa, on Suzuki GT380.550, 750, the same applies, but YES the wires can be changed, its not hard, follow the link poosted by Rob #8, have done it many times, and I have lots waiting to be done, gifted by others who are numptys (as Nickdav7, who I would not trust with a Palitoy/Fisher price plier, but have every faith in his penpushing/solicitering) or cant be bothered.
CLEM
 
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