its like lab said .
the underlying reason being the trispark is not a wasted spark type ignition .
the design asks for ;
3 -12v coils ,
or 3- 6volts coils... with a 1.6 ohm ballast resistor .
Has anyone had any experience using 4 volt coils on their Trident? A friend installed them on his '74 T150 which he has upgraded with an electric starter and he says the bike has no power. He says that the electric start circuit is somehow interfering with the 4 volt coils. He installed a set of 6 volt coils and they worked fine. The bike has a Trispark electronic ignition. Any thoughts?
the 4 volt coils may have been fine for another type of ignition ... a wasted spark type
( Maybe the previous igniton before the trispark was added )
You could probably fit an appropriate ballast resistor to make 4 volt coils work
... but trisPark , in some of their literature
Specifically mentions not to do so .
... the 4v. coils were too hot ( not enough resistance ) for the ignition dwell time and voltage
... somewhere in the 8 millisecond range x 12 volts .
it wasnt the starter motor causing the problem ... the coils were overheating . the Trispark ignition is not of the wasted Spark type
so each coil fires only one cylinder ... 3 individual pick up signals
fire three coils ... individually .
trispark recommends .
3 , 6volt coils with one ,,, 1.6 ohms ballast resistor Is there a ballast resistor fitted
... its important .
3 , 12volt coils ... with not ballast .
( they also recommend that if a ballast resistor is fitted ...for 6 volt coil operation .
it not be bypassed during start mode ... (the original diagram with a starter used a solenoid bypass )
i would assume
the 6volt coils with ballast ... would be a bettter match ... to an engine with a starter .
the literature mentions being good down to 8 volts , but i wonder ?