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Discussion Starter · #1 ·
I have a 2010 Z1000 & want to know what is the best aftermarket spark plugs which have been installed on their bike. Are there any performance advantages compared to stock. Also going to install a K&N air filter. Any guidance would be greatly appreciated.
 

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IMHO, plugs are plugs...I just use the stock NGK plugs. I do tend to avoid cheaper plugs (like Autolite), but Ive never had any problems with NGKs. Besides, thats what the manufacturer uses...so I figure I cant go wrong with that!

Those aftermarket plugs that claim increased horsepower - Ive read that they arent worth the money they charge for them. Im kinda skeptical when it comes to stuff like that...
 

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Denso or NGK, I always run NGK's on Jap bikes; ALWAYS.
 

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maybe at 15,000 miles you might think about spark plugs. their is NO gain in trick of the month spark plugs. if you have the proper spark plug in your bike and the gap is set right you are done. the amount of volts produced by the coil is the amount of voltage necessary to jump the spark plug gap. end of story.
now a captive discharge system [MSD ] is another deal all together.
 

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notabiker - I agree 110%.

But I did want to mention that spark plugs are called for in the 3000 mile service, and the 7500 mile service. And again in the 15K service, along with valve check.

Im hitting 7500miles next Friday and have an appt for the service...
 

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notabiker - I agree 110%.

But I did want to mention that spark plugs are called for in the 3000 mile service, and the 7500 mile service. And again in the 15K service, along with valve check.

Im hitting 7500miles next Friday and have an appt for the service...
I am coming up on 29,000 miles.... I have changed the plugs once @7k, and never checked the valve lash. I thought I might do it at the end of this season though. I think the plugs are just fine until you have a miss or some reason to change the plugs.
 

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wow with FI and unleaded fuel i am shocked that the spark plugs need to be changed that often.
Me too, but that is what the 2007 owners manual says, every 7,500 miles! I'm amazed since it runs so well and I've got over 9k on them now. I bought the bike used so I have no idea how many miles are on those plugs. I guess I'll be adding new plugs and a valve adjustment to the list before doing the dyno run and PCIII remapping.
Strange since we are in the days of iridium, platinum plugs etc. My BMW M3 recommends changing plugs every 100,000 miles.
 

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One trick is to make sure the gap is facing the intake valve.for better fire
 

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Discussion Starter · #12 ·
Thanks everyone for the valuable info. This is only my second bike so just feeling myself around. I have 11 000 k on my bike, looks like the stock NGK will be fine, @ my next service apmt.
 

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that is a old drag racer trick:)
i have 16,000 miles on my ORG spark plugs. if it was not a pain to change the center 2 i would do it. i think i will do it at 20,000.:headshake::dontknow:
Changed mine @ 7k, and I have 30k on the clock now with those plugs.... I am not changing them again until I replace the cam cover gasket, and rubber hold down washers.
 

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bought my 03 z with 3 k miles on it & now has 24.7k & rising daily & i havnt replaced mine yet. runs great probably need to change them soon. doesnt look like much fun 2 do.
 
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