Ummm...you don't need to drop the radiator, just unbolt the bottom bolt, after that that radiator has enough movement for you to easily get to the spark plugs.

 

Thanks bud ill give it a try! Those plugs are a nightmare to reach!:crash

 

I need to know the part number for my Yamaha R1 2007 Ngk spark plug iridium.
Thanks

 

2007 R1 ~ NGK CR9EIX (iridium)
CR9EK (stock)

 

I allready bought the spark plug iridium.
I post pictures and results later.
Thanks

 

gino, millions of post beat this topic up...... which is better the iridium or regular?

 

Iridium largely due to the much longer service life. We all know changing plugs on these bikes is a pain in the ass.

Iridiums on my R6 (2005) seemed to improve the gas mileage on it a bit too (like 15 km extra to get to reserve).

 

so just drop the radiator bottom bolt... do i need to take the air box out for any reason? or just do it from the side?

 

iridiums run really well i find.
You can feel the bike pull nice and strong through 2nd gear.

just make sure you don't touch the tip or use a feeler gauge you will stuff the plugs they already come pre-set from NGK.
and it's a really good idea to put them in using a torgue wrench as you should with any spark plugs.

 

Yeah I did the graves block off plates... with the AIS outta the way the sparks plugs are easy enough to do from the top, no need to mess with radiator.. although it does sound easy to move the radiator.

 

i use bosch platinum 4 in my bmw, can i use them for my 2000 R1 as well?? Or do they have to be CR9EIX's?

 

Wow. I just did this on an '08 (using the iridium plugs). What a pain in the dick. The side and bottom fairings, AND radiator? Ridiculous.