Powerdynamo brings new ignition & light
to your vintage motorcycle
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Powerdynamo brings new ignition & light |
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Starting trouble, especially with systems for Twin (or double spark) engines |
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We talk here about difficult start only, not of a situation where nothing runs at all. |
| People mostly suspect electronic parts as
defective when sparks do not fly as wanted. Let us start with saying that though every technical material might go wrong, in most cases it is NOT the electronics which is to blame. |
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| number one reason for bad starting are spark
plugs/spark plug connectors and HT wires (leads)
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many customers unfortunately discard this option as they
use brand new material. experience shows however that those materials are still number one reason. # you might have got plugs with internal resistor (offered widely to protect electronic equipment, but here totally out of place here!) We have even found differences in starting between good spark plugs of the same jmake but different heat grades. # there are (unfortunately) bad (counterfit) plugs on the market # you might have choosen plug connectors with high internal resistor # be especially wary of unused but old plug connectors (they are often corroded internally) |
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| number two reason is wrong positioning (height
and gap) of the sensor relative to the trigger protrusion of the
system
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Rule of thumb: The wider the gap the more difficult is starting. For 103 and 112mm rotor 0.4mm is correct. For 54mm or smaller trigger discs (camshaft triggers and magdyno) 0.25-3 is correct Besides gap checking, watch out for misalignment betwen trigger protrution and sensor. It should be (more or less) in one line. Not totally out of line as shown here. |
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number three reason is actually no malfunction, but a misunderstanding |
Magneto based systems spark only from a certain
revolution speed onwards. Usually kickstarter speeds (normal kick by
foot !) are sufficiant. Insufficant is definitely pressing the kicklever by hand or truning the rear wheel with the bike elevated and in gear. This will not bring spark (even less so in our sport systems of type 7100) |
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| May we add at the end of this page that the problem might also be in the carburettor or in wrong air beeing taken in by leaking seals. | |
| back to trouble shooting page | |
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more Info here
