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You can add an automotive relay: run a fused (15A) power line from battery + to the relay switch and a wire from the switch to the ignition coils. Power the relay coil from the existing power wire to the coils, retaining the key and kill switch functions. You can use a heavier gauge wire if you wish, too.
easiest and beast way to avoid the above problem is the relay.
I hear ya Twotired, but IF a frog had wings...
I agree it is not the optimal fix...
Hypothetically speaking, what could it hurt?
Quote from: Tnutz on December 22, 2009, 08:47:46 PMeasiest and beast way to avoid the above problem is the relay.I disagree.This leaves all the corroded connectors in poor condition and eating up/wasting power.If you restore condition to as new, it will work as new everywhere on the bike.
I have relayed my coils. [..] Running less current through the 30 year old harness and switchgear will significantly reduce the potential for damaging heat build up.
I disagree.This leaves all the corroded connectors in poor condition and eating up/wasting power.If you restore condition to as new, it will work as new everywhere on the bike.
well, i was thinking along the lines of my own scratch wired bike.
I have one dedicated cicuit from a relay right to the coils.
Power is not wasted/used if there is nothing else hooked up to the circuit.
But It's actually not a bad mod to do regardless.
It's a very popular mod on suzuki TL1000R's.
I Like to know i have uninterrupted 12v right to my coils with no drop along the way.
especially if i make the move to H.O. coils.
That's only half the power path. You have to get power to the relay as well.
Well sorry TT...the j-man electrician knows nothing i guess....
why did my xs650 start so much easier with h.o. coil vs the stock one?
i changed nothing else. i know i didn't gain power...but larger plug gap and easier starting were worth the mod.
QuoteThat's only half the power path. You have to get power to the relay as well.if you want to be douche and argue that the wire is broken where it connects to the relay terminals....okay...THERE IS NOTHING ELSE SHARING THAT CIRCUIT.....there...
perhaps there is no reason to do it that way. I like the idea that the bike will always run if i need it to regardless of what happens to the other power feed that feeds +12v to everything else.
so the h.o. coil wasn't worthless like you made it sound was it?
thats why you install a ballast resistor if you use a coil with a low primary resistance on points.. yes your spark output voltage is lower because of a lower input voltage....but it is still way higher than the barely adequate stockers that are now almost 40 years old.
i am aware it's off topic...but don't try to tell me the h.o. coils are a worthless mod either.
i am also trying to help people. My bike may get me home if something happens because i did that coil mod while you sit on the side of the road trying to farmer something together. it costs almost nothing to do too.
i am not saying don't clean your harness/connections up and fix the low voltage problem. go through the whole thing front to back....i just think it's great peace of mind.
The coils don't deteriorate with age. They can deteriorate with abuse. The copper windings don't change properties or their physical relationship, and as long as the outer cover of the coils remains undamaged, the internal wire insulation doesn't change either.