FJowners.com

General Category => Maintenance => Topic started by: Dads_FJ on March 13, 2012, 10:50:03 AM

Title: What Spark Plug To Use
Post by: Dads_FJ on March 13, 2012, 10:50:03 AM
I searched the archives to see what spark plug the FJ uses and didn't find anything... so for future reference:

NGK DP8EA-9
Stock number is 5829
Gap is: .035"

And if you don't know how many to order you need more help than I can offer.
Title: Re: What Spark Plug To Use
Post by: SlowOldGuy on March 13, 2012, 12:19:51 PM
I thought the later models recommend the resistor version; DP8REA-9?

DavidR.
Title: Re: What Spark Plug To Use
Post by: andyb on March 13, 2012, 01:07:52 PM
Think it depends on who you ask.  The NGK part guide online lists one base type as fitting both 1100 + 1200.
Title: Re: What Spark Plug To Use
Post by: Dads_FJ on March 13, 2012, 01:08:45 PM
What Andy said.  At the time I only checked for the 1100 (selfish I know...), but looking here:

http://www.yamahapartshouse.com/#/Yamaha/FJ1200AE_-_1993/CYLINDER_HEAD/FJ1200AE_(1993_MOTORCYCLE)/CYLINDER_HEAD_(FJ1200AE_-_1993) (http://www.yamahapartshouse.com/#/Yamaha/FJ1200AE_-_1993/CYLINDER_HEAD/FJ1200AE_(1993_MOTORCYCLE)/CYLINDER_HEAD_(FJ1200AE_-_1993))

and here:

www.ngk.com (http://www.ngk.com)

the '93 1200 calls for the same plug.  Same gap too, .035" or .9mm.
Title: Re: What Spark Plug To Use
Post by: SlowOldGuy on March 13, 2012, 04:06:39 PM
Oh?
Like I'm supposed to trust the people who made the motorcycle AND the people who make the spark plugs?   These are the very same people who want your motorcycle and spark plugs to wear out quickly so they can sell you new stuff.   Are we supposed to blindly follow the herd?  Can't you see the conspiracy?  :-)

I'm sure Obama's is behind this!  Driving up the price of gas and taking the resistors out of our plugs (I'm sure the resistors give us better fuel mileage!).

Geez, some people are so gullible, just because it's on the internet, doesn't mean it's true.  :-)

Uh .... I got nothin.  Except that I'm sure that at some point in my life I read a post by Jon Cain that said use the resistor plug. 
(yeah, I'll blame it on Jon)  :-)

DavidR.
Title: Re: What Spark Plug To Use
Post by: Marsh White on March 13, 2012, 04:22:34 PM
Quote from: SlowOldGuy on March 13, 2012, 04:06:39 PM

Uh .... I got nothin.  Except that I'm sure that at some point in my life I read a post by Jon Cain that said use the resistor plug. 
(yeah, I'll blame it on Jon)  :-)

DavidR.

I thought the only point to using the resistor version of the plug was that it would cut down on EM or "radio noise" for those of use using wired in (and maybe even NOT wired in?) electronics and intercom speaker amps.  I'm fairly certain I didn't make that up and that it came from old knowledge from the yahoo board.  That said - I've used both and could never tell a difference.   
Title: Re: What Spark Plug To Use
Post by: weymouth399 on March 13, 2012, 04:54:07 PM
Quote from: Marsh White on March 13, 2012, 04:22:34 PM
Quote from: SlowOldGuy on March 13, 2012, 04:06:39 PM

Uh .... I got nothin.  Except that I'm sure that at some point in my life I read a post by Jon Cain that said use the resistor plug. 
(yeah, I'll blame it on Jon)  :-)

DavidR.

I thought the only point to using the resistor version of the plug was that it would cut down on EM or "radio noise" for those of use using wired in (and maybe even NOT wired in?) electronics and intercom speaker amps.  I'm fairly certain I didn't make that up and that it came from old knowledge from the yahoo board.  That said - I've used both and could never tell a difference.   

I have been told "for my dirt bike" to run a r plug so you don't interfere with your own CDI, I would imagine the same applies here. I was having issues with a new bike and called team green and that was one of the things they said to check.

Bob W
Title: Re: What Spark Plug To Use
Post by: moonrunnah on March 13, 2012, 07:27:36 PM
Quote from: SlowOldGuy on March 13, 2012, 04:06:39 PM
Oh?
Like I'm supposed to trust the people who made the motorcycle AND the people who make the spark plugs?   These are the very same people who want your motorcycle and spark plugs to wear out quickly so they can sell you new stuff.   Are we supposed to blindly follow the herd?  Can't you see the conspiracy?  :-)

I'm sure Obama's is behind this!  Driving up the price of gas and taking the resistors out of our plugs (I'm sure the resistors give us better fuel mileage!).

Geez, some people are so gullible, just because it's on the internet, doesn't mean it's true.  :-)

Uh .... I got nothin.  Except that I'm sure that at some point in my life I read a post by Jon Cain that said use the resistor plug. 
(yeah, I'll blame it on Jon)  :-)

DavidR.


i agree its his fault gas is so expansive  :crazy:


Title: Re: What Spark Plug To Use
Post by: Dads_FJ on March 13, 2012, 10:31:07 PM
Quote from: weymouth399 on March 13, 2012, 04:54:07 PM
Quote from: Marsh White on March 13, 2012, 04:22:34 PM
Quote from: SlowOldGuy on March 13, 2012, 04:06:39 PM

Uh .... I got nothin.  Except that I'm sure that at some point in my life I read a post by Jon Cain that said use the resistor plug. 
(yeah, I'll blame it on Jon)  :-)

DavidR.

I thought the only point to using the resistor version of the plug was that it would cut down on EM or "radio noise" for those of use using wired in (and maybe even NOT wired in?) electronics and intercom speaker amps.  I'm fairly certain I didn't make that up and that it came from old knowledge from the yahoo board.  That said - I've used both and could never tell a difference.   

I have been told "for my dirt bike" to run a r plug so you don't interfere with your own CDI, I would imagine the same applies here. I was having issues with a new bike and called team green and that was one of the things they said to check.

Bob W

I believe there should be a resistor in the circuit, sometimes it's just located in the spark plug boot.  so... if you run resistor spark plugs then the boot shouldn't be, and if there's no resistor in the boot, then your plugs should be.  :crazy:
Title: Re: What Spark Plug To Use
Post by: candieandy on March 14, 2012, 10:49:44 AM
Hey Guys,

The FJ CDI ignitions need a resistor. The rule is "any electronics on the bike that utilize a circuit board in any way", require a resistor spark plug. That ensures circuit protection. I have seen a lot of people use non-resistor plugs with ther CDI ignition box( which will work) but within a year or two fry the boards inside the CDI.  If you are running a bike with points( a much older bike typically) you can use a non-resistor spark plug, but bikes from the 1980's and on, use a resistor plug or a 5k ohm resistor cover  or commonly use both.

Andrew
Title: Re: What Spark Plug To Use
Post by: FJ111200 on March 14, 2012, 11:02:39 AM
Interesting.
  So, what is the difference between a TCI and a CDI?
The reason i ask is because my XS1100's use TCI ignition systems and a NGK BP6ES plug, and i think the resistor is in the plug cap, and i thought that the FJ's were TCI's aswell, and the plug is a DPR8EA.
Just a bit confused now, that's all.

I'll just edit.

OK then the FJ1100 and early 12's use a TCI, transistor controlled ignition, and the later 12's use a CDI, which i think stands for computerised digital ignition.
I'm using FJ1100 ignition systems on both my XJR's.
So, what's better, TCI or CDI?
Title: Re: What Spark Plug To Use
Post by: Dads_FJ on March 14, 2012, 11:48:55 AM
Quote from: FJ111200 on March 14, 2012, 11:02:39 AM
Interesting.
  So, what is the difference between a TCI and a CDI?
The reason i ask is because my XS1100's use TCI ignition systems and a NGK BP6ES plug, and i think the resistor is in the plug cap, and i thought that the FJ's were TCI's aswell, and the plug is a DPR8EA.
Just a bit confused now, that's all.

I'll just edit.

OK then the FJ1100 and early 12's use a TCI, transistor controlled ignition, and the later 12's use a CDI, which i think stands for computerised digital ignition.
I'm using FJ1100 ignition systems on both my XJR's.
So, what's better, TCI or CDI?


The term CDI has become sort of slang for electronic ignition, but CDI actually stands for Capacitor discharge ignition.  Not sure which is better or older though. Regarding resistors in the cap and/or plug, my understanding is that one shouldn't use both resistor caps AND resistor plugs.
Title: Re: What Spark Plug To Use
Post by: JCainFJ on March 14, 2012, 01:05:59 PM
.egarag sih ni pu dekcat galf eimmoc a sah htrofyaR diviD.
Title: Re: What Spark Plug To Use
Post by: Dads_FJ on March 14, 2012, 02:36:51 PM
Quote from: JCainFJ on March 14, 2012, 01:05:59 PM
.egarag sih ni pu dekcat galf eimmoc a sah htrofyaR diviD.

I'm speechless!  or Jon had a stroke.
Title: Re: What Spark Plug To Use
Post by: Harvy on March 14, 2012, 08:03:25 PM
Quote from: JCainFJ on March 14, 2012, 01:05:59 PM
.egarag sih ni pu dekcat galf eimmoc a sah htrofyaR diviD.

?galf hcihw...... nhoJ

yvraH
Title: Re: What Spark Plug To Use
Post by: Dan Filetti on March 14, 2012, 08:06:29 PM

Quote from: JCainFJ on March 14, 2012, 01:05:59 PM
.egarag sih ni pu dekcat galf eimmoc a sah htrofyaR diviD.


Broca's aphasia?
Title: Re: What Spark Plug To Use
Post by: Dads_FJ on March 14, 2012, 09:23:16 PM
Quote from: Harvy on March 14, 2012, 08:03:25 PM
Quote from: JCainFJ on March 14, 2012, 01:05:59 PM
.egarag sih ni pu dekcat galf eimmoc a sah htrofyaR diviD.

?galf hcihw...... nhoJ

yvraH

now I get it.  the flag answer is at 3:24 give or take
Charlie Daniels Uneasy Rider (http://www.youtube.com/watch?v=952h-AJ3Bcg#)
Title: Re: What Spark Plug To Use
Post by: FJmonkey on March 14, 2012, 10:01:24 PM
Quote from: Dads_FJ on March 14, 2012, 09:23:16 PM
now I get it.  the flag answer is at 3:24 give or take
Charlie Daniels Uneasy Rider (http://www.youtube.com/watch?v=952h-AJ3Bcg#)
Been a long time since I heard that song, thanks......
Title: Re: What Spark Plug To Use
Post by: JCainFJ on March 14, 2012, 11:37:17 PM
aeroK htroN
Title: Re: What Spark Plug To Use
Post by: Harvy on March 14, 2012, 11:48:16 PM


.manteiV htroN neeb evah yam ti thguoht I.....mmmmmH