Tri-spark ground

htown16

htown16

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I've installed Pazon Surefires and I've always run the ground back to the positive battery post (positive ground bike). Now I'm doing a Trispark. It just says run red to ground. Is it alright to run it to the positive battery post?
 
htown16 said:
I've installed Pazon Surefires and I've always run the ground back to the positive battery post (positive ground bike). Now I'm doing a Trispark. It just says run red to ground. Is it alright to run it to the positive battery post?
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However you accomplish it, it needs a good engine ground which is why the red wire is short and goes under the top mounting screw by design.
 
Battery post is OK, but not necessary if your engine ground is solid. Mine grounds to the engine case through one of the points cover pillars, as is what the design intended. During strobe timing however, I jumper the ground wire to the wiring harness ground so that I can loosen the pillars without risking losing the ground connection.
 
Sorry, I should have been clearer. l meant the ground from the first coil positive post.
 
I take an extra red cable and run it back up to the coil instead of relying on grounding on the pillar bolt (it's tight, but there is just enough room).

I read it in this group and it made a lot of sense to me.
 
htown16 said:
Sorry, I should have been clearer. l meant the ground from the first coil positive post.
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I run that to the same place as the harness red wires connect to the head. Originally, that was the head steady, but I put them under the Allen on the timing side that holds the head steady. That way I'm positive that the harness and the coils have a solid engine ground.
 
this is definitely OVERKILL, but just installed a tri-spark on a BSA spitfire project - ran a separate engine ground directly back to the battery. the tri-spark module - the normal tri-spark ground AS WELL AS a separate, redundant, ground directly to the battery. on my norton, where the harness ground attaches to the head steady, a ran a secondary ground jumper to the cylinder head.
Tri-spark ground
 
"this is definitely OVERKILL,"

Nah... I think it's entirely proper; there is no such thing as a ground that is "too good!" ;)
 
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