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NGK DCPR8E vs Nippon Denso Iridium IXU24 Spark Plugs

Rikard

as joe says fella...

another sign of a weak spark is when the spark is from different points to different places. this menas that it's struggling as well. i like to see my spark blue and from the same place EVERY time.

regards

Taffy
 
thought i'd just add this to cause some confusion.

i've got a completly standard 03 400 which recently has had starting probs.

1 dealer had it for a while, charged me for the honor and it still wasn't starting much better.

another dealer has had the bike for less than 24 hrs and its starting absolutly amazing, sounds better and goes better.

now the relevent thing is i had fitted a ixu24 but the dealer had taken it out and replaced it with a standard dcpr8 plug. when i asked why the response was "because the the spark can be on the weak side with these iridium plugs"

i didn't ask what he meant but think if the chap who's got my bike running so well says stick to standard i'll stick.

i know taffys bike is pretty tricked out so possibly thats why he has better results with the ixu24
 
Hallo again!

I´ve now tried to test my sparkplug as you´ve described, and it worked...
as long as my e-start had any power...

I´ll guess you need to be two persons to check it with the kick, or am I wrong?

It came blue sparks from the old one, but I got the feeling that the new plug gave more even ones.... but I´m not sure...

When I compared the old and the new one, I saw that "the gap" on the old one were much wider than on the new, yes, I understand that that´s probably as it should be, the old one wears out... but wouldn´t that also make the spark less powerful, even though it´s still a blue spark?

Well, well at the end of the day the bike started more easy with the new plug...

I also tightened the autodecomp wire, as I saw that it had a slack of more like 4-5mm than, what I´ve read here, the 2-3mm it should have... ( I know that you should measure it in TDC, but I did, ´cause I had just checked the valves so that they wasn´t too tight and was causing the hard to start thing...)

So maybe you could tell me what you think made the most difference?

We´ll see on my next ride if things are fine...

Until then... thanks for your help...

/Rikard
 
The gap on the old one was probably much too big. The book says it should be 0.7mm ( 0.028" ). The bigger it is, the more voltage it takes to make the jump and that means you have to kick it faster to get it to spark.

Regards,

Joe
 
Thanks joe!

what should I do without you guys!!!!

Have to measure the old one!!

What do you think of tightening the autodecompwire...?

/Rikard
 
boheme said:
Thanks joe!

what should I do without you guys!!!!

Have to measure the old one!!

What do you think of tightening the autodecompwire...?

/Rikard
Click to expand...

2mm + - 1mm is the value in your Owners manual.

Regards,

Joe
 
cypher

i don't have a problem with the standard plug at the beginning. it's fter some use that it goes awol. i race so i am trying to turn mine to toast all the time.

if i'm right, within a few rides it'll be a ***** to start again!

regards

Taffy
 
still got the ixu24 so will run some comparisons over the next few rides.

but just been outside and the bike started as soon as i touched the button.
no churning or anything.

had to sit down in shock.
 
RE: Re: DCPR8E versus IXU24

Ok, folks... I´ve been out riding... and it works much better!!! One thing i wonder is wether a bad sparkplug could make it moore difficult to keep the motor alive while driving... It felt like that!
After the change it feels like the bike won´t die on me as easily as it did with the old plug...
Could that be true or am I imagining?

/Rikard
 
RE: Re: DCPR8E versus IXU24

100% true

now you get it?

right!

regards

taffy
 
RE: Re: DCPR8E versus IXU24

hi guys
as you know i run an old bike (1990) and the plug is a ngkcr8e, i notice a fair bit of difference between individual plugs, meaning i dont think they are very consistent with the standards of manufacture. is there a newer iridium version of this plug to fit my engine? i'd like to try one if it exists as i find myself going through spates of replacing plugs regularly, and then when i do find a good one it works for a lot longer.
 
RE: Re: DCPR8E versus IXU24

Taffy, was that answer meant for me?

/Rikard
 
RE: Re: DCPR8E versus IXU24

yes boheme

why does an engine slow before it stalls on choke? each cycle produces a poorer spark and a correspondingly badder running motor.

regards

Taffy
 
RE: Re: DCPR8E versus IXU24

just come to the chat and give me a big hug you english teaabuser!!! :D
 
RE: Re: DCPR8E versus IXU24

it's the warm considerate way i tell 'em i think... :moan:

regards

Taffy
 
Taf, not much to say about it really, the 8 got black and that made it piggish to start. Changed to 7. Cured.
The girl in the shop used the 7 herself in her 450.
:wink: / Smorgy
 
absolutely 100% right thing to do when the bike is running STUPIDLY rich at some point in the low revs/starting area.

either the needle straight, the PJ is low or the PAJ is high or the choke jet is very rich. any one of these will mak eit bloody near impossible toi do anything but run a 7. done it myself and BEGGED yes i begged, TT (wr400) owners to go to an 8 from a 9.

i've said it here fella and i only hope people listen.

BUT, remember, this is a band aid to a machine gun wound....

get the jetting right and then you can go back to an 8 or even a 9...

think about that!!!

regards

Taffy
 
Re: RE: Re: DCPR8E versus IXU24

husadaddy501 said:
hi guys
as you know i run an old bike (1990) and the plug is a ngkcr8e, i notice a fair bit of difference between individual plugs, meaning i dont think they are very consistent with the standards of manufacture. is there a newer iridium version of this plug to fit my engine? i'd like to try one if it exists as i find myself going through spates of replacing plugs regularly, and then when i do find a good one it works for a lot longer.
Click to expand...
I own a 96 and the plug I use is a NGK CR8EK. For me that is a way better plug than the CR8E. The bike is easier to start, warms up quicker and runs better.
Hope this helps you out.
 
Taffy, the blackness of the 8 built up over considerable time. Not a big problem really. The PJ actually IS on the small side, just as you perhaps guessed. It was chosen to give the easiest starts rather than the best running. And it is now a very easy starter indeed. At 9 stones with a kick starter only I need that. I never bothered to try other PAJs than the one originally fitted. I do not know how to remove it without damaging it, it seems, if I remember it right, like its been pressed in. Yes, it is the 40mm DellOrto.
Regards.
 

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