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V7 spark plug wire issues

elkgrichard

elkgrichard

High Miler
Joined
Mar 31, 2014
Messages
551
Location
California
Have noticed the spark plug caps have a very soft metal clip that fit over the end of the plug, and tend to spread open when pushed onto the plug end. I've noticed they end up loose even after tightening them up with needle nose pliers. As soon as you push the cap back onto the end of the plug the inside wire band spreads back out and end up loose fitting onto the plug. I've never had an issue like this on any other car or motorcycle. I end up using dielectric grease in the hope that it may help the weak electrical connection with these soft metal clips that spread out as soon as you push them onto the plug.

Is there a better fitting wire set from like NAPA that can be used? Part numbers please if you guys have a fix or crossover for this problem.

My concern... it may be difficult to find a 90 degree end to properly fit onto the plug clearing the valve cover properly. Too short too long whatever?
 
I replaced my caps with NGK XD05F (8072). You'll need different plugs to go with them. I used NGK CR9EK (4548). Both are a perfect fit and available from Amazon. Your new caps will not come off unless you want them to.
 
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Unscrew the old ones. Odd, I know, but that's how it works. Then you need to cut the crimped end off the spark plug wire to install the new ones. I think the new ones have a skinny point that screws into the end of the wire (It's been a while).
 
OK, thanks much.

The stock caps are just flat out crap. first for me.

Why did you need to go to a different plug? Shorter or longer insulator maybe? Or thickness of the insulator?

Long as it all fits and I can still snap that plastic cover over the top of the whole thing. It's all good at that point, anything is better then what's on there. YIKES!
 
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Confirm if the V7 is a resistor or non resistor type before you buy new ones.
If a resistor type, make sure you get the correct replacement value.
I just got my V7 so I'm not familiar yet with the details.
Someone here should know.
 
Maybe the guy that did it. They're both resistor caps rated at 5k ohms.

You need new plugs to get a different connector on the top. The new caps have the wire spring type connection that slides over a threaded top on the plug.
 
It's interesting that the recommended replacement plug and cap are both resistor types, 5K ohms each. The OEM spark plug is also a resistor type (5K ohms). If I'm interpreting the workshop manual correctly, the OEM caps seem to also be resistor type (5K ohms) I don't understand why both the plugs and the caps should need resistors, I would think that either one or the other would suffice.
 
Interesting read. I remember if you had a hum in your car radio they would tell you to put a resistor type plug in the cars. With all of this electronic stuff it's gone a little further then just that.

Put my order in with amazon.
 
pokeyjoe said:
Apparently, some applications have resistor type plugs, caps, AND wires. A pretty good description of the problems can be found here.
Click to expand...
Thanks for posting the link. I remember reading it a while back but didn't save it.
As is clear in the post, replacing caps and plugs with the incorrect ones can be problematic.
 
RF energy in aircraft have been a problem for years with radio/navigation/weapons systems. RF circuit jump maybe the cause of the rocket that was accidently launched that created the USS Forrestal fire. Apparently a power surge in the cockpit when the power was turned on to the instruments created an RF power surge that launched that rocket. They found all the weapon switches in the off position when they inspected that incident. They determine it was a power surge that leaped across the circuits. Dangerous stuff.

Now that motorcycles are going to electric/electronic throttle, fly by wire, this RF energy issue can really get dangerous.
 
Yeah, I'd hate to have my V7 pushed off the deck of an aircraft carrier. I think they make every new recruit watch that video as part of their shipboard fire fighting training.
 
I was on that ship, got on after the fire. Did get to hear all of the stories about what happen that day. I did end up fighting the second fire in 1972.

We called the ship the zippo. That ship had a reputation, if something could go wrong it would go wrong on that ship. There were ghosts on that ship in those aft 02 level berthing compartments. Voices, banging sounds in the middle of the night, junk like that. Scary stuff, my berthing area was forward on that 02 level. I never did have an encounter with a ghost myself, but knew people that swore they had encounters. I always made a point of not walking around back around those berthing areas. Gave me the creeps.
 
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