[Keyser]

Does anyone know the correct part number? I've seen CPR9EAIX-9 and CR9EIX.

 

[OldSchlPunk]

Stock is CPR9EA-9. NGK says CR9EIX is the upgrade replacement.

https://www.ngkpartfinder.co.uk/assets/Uploads/NGK_Upgrades.pdf

 

[PinoyRider88]

Following for future reference. Also, I remember during the early days of the pandemic. Finding them took an act of God. The Yamaha Parts clerk told me to buy a lottery ticket

 

[Keyser]

Thanks, for some reason when I tried NGK website it wouldn't pull anything up. I found them on Partzilla.

 

[abe57]

You can also find them here : SparkPlugs.com: Search

 

[E-Wolf]

In my recent research I found that the exact NGK iridium plug is the CPR9EAIX-9. The only place I could find them was Japan Spark Plugs. Being obsessive type I obviously ordered them (at nearly 100 bucks shipped for the three).

JAPANSPARKPLUGS - 1x NGK IRIDIUM IX CPR9EAIX-9

1x NGK IRIDIUM IX Ref. CPR9EAIX-9 N°97673 Spark Plug / Equivalence CPR9EA-9 / DENSO IU27 / IU27A

japansparkplugs.com

Installed them during my recent engine work, engine starts great with very nice throttle response. So about the same as normal only Iridium!😜

 

[Camp49]

Got mine at the ZONE, AUTO ZONE. the dude at the counter asked me if I was sure I only needed 3.

 

[Keyser]

Got mine at the ZONE, AUTO ZONE. the dude at the counter asked me if I was sure I only needed 3.

Lol

 

[gmtech16450yz]

These will work also and you can probably find them locally...

 

[MK3Brent]

You guys are changing your spark plugs?!

 

[gmtech16450yz]

You guys are changing your spark plugs?!

Guaranteed to double your horsepower and cut your fuel usage in half!

 

[MK3Brent]

Guaranteed to double your horsepower and cut your fuel usage in half!

Won't SOMEBODY please think of the oil companies?!

 

[Keyser]

You guys are changing your spark plugs?!

I've gotta sync my throttle body and figured I might as well I'm down there, it'll be the first change since new, about 9k miles ago.

 

[GreatHolio]

about 9k miles ago.

Isn't this a short life span for sparkies? I mean, not saying you shouldn't do it since you will be in the neighborhood...

I guess my question is, what mileage should one get out of sparkies?

 

[Screan29]

Isn't this a short life span for sparkies? I mean, not saying you shouldn't do it since you will be in the neighborhood...

I guess my question is, what mileage should one get out of sparkies?

You bought this bike for its mileage? Lol

 

[feliks]

You bought this bike for its mileage? Lol

I think he is asking how many miles the spark plugs will last, not trying to improve gas mileage. I could be wrong.

 

[Keyser]

Isn't this a short life span for sparkies? I mean, not saying you shouldn't do it since you will be in the neighborhood...

I guess my question is, what mileage should one get out of sparkies?

I'm sure they'd be good to 20k miles from what I've seen other people pull, but I think the manual says like 8k or something like that.

 

[GreatHolio]

the manual says

I'm looking at my Service Manual now, it says replace every 12k. Oops, mine are overdue at 16k miles.

To be honest tho, I'd like someone with some scientific evidence to tell me why I should replace them at such short interval. I ran a Honda Civic to it's stolen death with more than 200k miles on same sparkies with no CONSIDERABLE detriment to performance or mpg.

I'm currently running a Honda Fit to it's death. It has prolly 35k on NGK Iridiums, and again, no detriment to any performance.

 

[betoney]

Isn't this a short life span for sparkies? I mean, not saying you shouldn't do it since you will be in the neighborhood...

I guess my question is, what mileage should one get out of sparkies?

I have never changed them before 20k on any bike, insulators always looks good and center/side electrodes have sharp edges. I change them during the valve check/ throttle body sync just because it is convenient when everything is apart. YMMV.

 

[Cw09]

I've changed multiple sets at 25k that still looked good