I would like to use coils from a 1997-98 700 redhead on my 2002 redhead motor.
i want to mount them on the air box, as I am running a boost bottle, and the factory ones that mount behind the carbs won’t work, not enough room.
wondering if anyone has a good reason why this may or may not work?
i want to mount them on the air box, as I am running a boost bottle, and the factory ones that mount behind the carbs won’t work, not enough room.
wondering if anyone has a good reason why this may or may not work?
Vincent
New member
The coil numbers don't match.... Not sure if they are interchangeable
yep, I noticed that, but, I know they can both fire a BR9ES.
Just wondering if there is a spec sheet somewhere to see if they put out the same charge or not, or, even if it would matter much ?
Just wondering if there is a spec sheet somewhere to see if they put out the same charge or not, or, even if it would matter much ?
Mudgunner
New member
They probably have a different company making them now, I’m sure at a dealer they’d have the part number lead to a new part number. I just replaced one of mine with an aftermarket coil and it’s for 97-03 Red heads. Also, I mounted my coils on the front of the head using two of the head studs. I used the original coil bracket, just drilled two of the mounting holes larger to fit over the head studs.
I have CPR pipes on it, and one pipe runs right where these would mount on the head.
Vincent
New member
Did you compare their ohms for fun?
Interesting they fire the same kinda plugs.... Heck I'd give it a try
Interesting they fire the same kinda plugs.... Heck I'd give it a try
Well, i’m thinking it will work, just wondering if I will lose performance, because of a weaker spark.
I guess if someone tells me what to set my multimeter to, I could test spark on the newer coil pack as compared to my 1997 SX.
I guess if someone tells me what to set my multimeter to, I could test spark on the newer coil pack as compared to my 1997 SX.
A couple of bucks
VIP Member
Wire lead length??
You mean you think the length of spark plug wire may affect it?
Mudgunner
New member
I’m thinking he meant the plug wire may not reach the plugs if installed on the air box. I know mine wouldn’t which is why I installed on the front of the head.
Yes, i can’t mount the 2002 coil pack on the air box, won’t reach.
That’s why I want to use the 1997 coils that mount on the air box.
Just concerned that they put out less juice than the 2002 coils.
The 2002 coils run off the 300 watt charging system, where as the 1997 coils are designed with the 75 watt.
Not sure that matters.
That’s why I want to use the 1997 coils that mount on the air box.
Just concerned that they put out less juice than the 2002 coils.
The 2002 coils run off the 300 watt charging system, where as the 1997 coils are designed with the 75 watt.
Not sure that matters.
A couple of bucks
VIP Member
A couple of bucks
VIP Member
How about using a splicer in conjunction w/ the 2002 coils?
https://ngksparkplugs.com/wp-content/uploads/2019/04/Power-Sports-Ignition-Parts.pdf
https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=ngk+splice&_sacat=0
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That might be an option!
Is the factory wire 7mm though?
Is the factory wire 7mm though?
Ok, measured both 2002 and 1997 wires, both are 7mm outside diameter..
A couple of bucks
VIP Member
Yes they are 7mm. I've had to buy some for my 97 SX7.
So, on the 97, do the wires unscrew from the coils??
