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bre9853

· The Grey Ghost
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Discussion starter · #1 ·
I am using my bike (08-R1)strictly for the track an needed to do a tune up. I wanted to put the OEM NGK plugs back in, but seen some NGK iridium plugs which is a step up. Would that mess up my engine changing plugs? Should I stick with the OEM
 
I have been using the NGK Iridium Plugs in my 08 R1 for years Love them ..bike runs great.
Just ensure you don't touch the tip with anything the iridium tip can be damged very easily.. they come pre-set from ngk as all spark plugs do so no need to touch them if they do look wrong take back to shop and swap them over.
If your Fuel / Air Ratio is too rich that will foul up the spark plug very easily more so than standard oem plug.
 

I wanted to put the OEM NGK plugs back in, but seen some NGK iridium plugs which is a step up. "Would that mess up my engine changing plugs?"

Only if the electrode breaks off inside your engine. Personally, I have had great luck with OEM plugs. 16k miles, and they still look new. As far as I know, the advantage of irridium, is longevity.

16k miles on a 13 year old bike on original plugs that still look new, I'll stick with OEM.




 
They also have a more concentrated spark kernel as well as longevity. The part number is 3521 or CR9IEX. When I switched to the Iridiums the bike fired on initial start ups much quicker than with the OEM plugs. I change mine out around 12-14,000 miles and they still look new. The manual says to change them at 8,000 miles I believe. And the original plugs looked like garbage well before 8000 miles!
 
I just changed the plugs on my 04 R1 yesterday. I ended up going through the radiator from the side. It's a really patient job. You have just enough room to pull coils and swap plugs. It definitely beat taking off gas tank and air box.
 
And once you install the smog plates you will find it much easier to do plug changes. Once you drop the radiator down you have plenty of room to get to the plugs from the sides.
 
Thanks for the reply. Just looking around for a good price now. Now which is the best way to get to them? Radiator pull or taking the top off?
I just did this on my 07. You'll get the most space if you pull your plastics and drop the radiator. If you are planning on smog plates too, I'd highly recommend doing that first. It will give you a lot more space with the AIS unit gone. Pay attention to the wires as you work in that area. It's a tight space and it's easy to catch a wire with your wrench mid stroke.
 
CR9EIA-9 is another good plug but if its a track bike than i would suggest running CR10
Either E or EIX or EK or even if you can aford then a straight 10 race plug but a 10 heat range will help keep the combustion temp down
 
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