I have a 99 CBR F4, manual says replace plugs @ 8k, im at 11k and im pretty sure the previous owner never did it. Anyway which plugs should i run? OEM? Where can i get them and is there a "How To" anywhere on how to do this?

 

IX Iridium

Edit: BTW thats the cheapest place your going to find them. Most places sell them at $10 per.

 

Do those fit the 99? Are the denso any better or the same???

 

They will fit and I wouldn't use denso they are not mention in the service manual and they cost twice as much.

 

Sick, thanks for the advice!!!

That is awesome, I prefer ngk, but someone told me denso plugs run forever, I assume all iridium will run forever anyways...

 

I just bought some, couldn't resist, I love ngk, they have always done well in different cars I have built, and in my bikes. I have never tried iridium, so it will be interesting...I am doing a rejet here shortly as well with a factory pro kit, so It will be nice to have some plugs that can take it...

 

Is there a write-up on how to change the plugs?

 

I have a service manual that is in .pdf form, got it from this link, check it out, it has a good write up, nothing horrible, I have done it before on other bikes...

http://cbrworld.net/forums/thread/204075.aspx

Just find your bike, and then "save the movie" and you will have the entire manual in pdf form!!! [sm=bling.gif]

 

You can take off the raditor and get the plugs from the front. The raditor is easy to get off but the area you will work in is extreamly tight. I lift up the gas tank, not completely off, and would take off the airbox. The airbox is about 4 hoses and 6 lose screws and its off. You can hit the plugs from the top it will be alot easier to change. I just bought the NJK Iridum and my bike runs smoother and starts the first time almost everytime now on a cold motor.

 

Wow, killer information!!! Thanks +10! I just bought the ngk iridium's can't wait to get them in!!!