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  1. #11
    Vrrroooooom! I want to replace my spark plugs Motogiro's Avatar
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    Re: I want to replace my spark plugs

    Quote Originally Posted by jdmlude View Post
    Didn't want to start a new thread so piggy backing off this one.

    Are you guys gapping .6 or .7mm on a stock setup (or w/ exhaust)? Anything to be gained one way or the other?
    Spark is generally effected by voltage from the coil, compression and gap between the anode (center conductor) and ground. The factory spec for gap is good.
    Spark plug gap for OEM plug:
    0.6–0.7 mm (0.024–0.028 in)
    If you can't fix it by hitting it with a hammer, it's electrical!

    Clif
    SoCal Hoon

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  3. #12
    Member MIJ_FZ6's Avatar
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    Re: I want to replace my spark plugs

    What NGK part number are you using? Isn't there an option for standard and iridium plugs? I'm ordering a bunch of refresh items, might add this to my list.

  4. #13
    2007 FZ6 TownsendsFJR1300's Avatar
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    Re: I want to replace my spark plugs

    Quote Originally Posted by jdmlude View Post
    Didn't want to start a new thread so piggy backing off this one.

    Are you guys gapping .6 or .7mm on a stock setup (or w/ exhaust)? Anything to be gained one way or the other?
    Gap them to the tight end of spec's. The gap opens up as the plug wears.

    Doesn't matter about the exhaust, no gains or losses with .1mm difference..
    Scott
    2007 Yamaha FZ6- BD43 headlight mod, PIAA bulbs, Stebal air horn, Scorpion SS pipes-(no DB killers), Speedohealer, HEL SS brake lines, Fenda Extenda, K&P SS re-usable oil filter, custom mounted BMW style electrical outlet(L.S.), Techmount GPS mount with handlebar bar risers/set backs, additional helmet lock, custom mod'ed seat(Spencers), Hyper light-rear running/brake light, custom radiator/fan protector, Techspec tank pads, Grip Puppies, Yamaha rear rack with custom aluminum flat rack.

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  6. #14
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    Re: I want to replace my spark plugs

    NGK CR9EK. That's the only recommended plug in the manual.

  7. #15
    2007 FZ6 TownsendsFJR1300's Avatar
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    Re: I want to replace my spark plugs

    I "up-graded" to Iridium's awhile ago.

    The stock plugs were in great shape (past due), and I haven't found the iridium's to last longer or perform any better...

    Next change, STOCK, OEM plugs go back in...
    Scott
    2007 Yamaha FZ6- BD43 headlight mod, PIAA bulbs, Stebal air horn, Scorpion SS pipes-(no DB killers), Speedohealer, HEL SS brake lines, Fenda Extenda, K&P SS re-usable oil filter, custom mounted BMW style electrical outlet(L.S.), Techmount GPS mount with handlebar bar risers/set backs, additional helmet lock, custom mod'ed seat(Spencers), Hyper light-rear running/brake light, custom radiator/fan protector, Techspec tank pads, Grip Puppies, Yamaha rear rack with custom aluminum flat rack.

  8. #16
    Member MIJ_FZ6's Avatar
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    Re: I want to replace my spark plugs

    Im going to stick to what the manual recommends. My bike is a 2009 with ~5K miles. Mileage is no where near needing to replace the plugs but should I consider replacing them just due to their age?

  9. #17
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    Re: I want to replace my spark plugs

    Quote Originally Posted by MIJ_FZ6 View Post
    Im going to stick to what the manual recommends. My bike is a 2009 with ~5K miles. Mileage is no where near needing to replace the plugs but should I consider replacing them just due to their age?
    I personally wouldn't change them before they're due. Waste of money, unless of course you're experiencing issues.

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  11. #18
    2007 FZ6 TownsendsFJR1300's Avatar
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    Re: I want to replace my spark plugs

    Quote Originally Posted by MIJ_FZ6 View Post
    Im going to stick to what the manual recommends. My bike is a 2009 with ~5K miles. Mileage is no where near needing to replace the plugs but should I consider replacing them just due to their age?
    No reason to change them.. Their not worn and they don't break down sitting there...
    Scott
    2007 Yamaha FZ6- BD43 headlight mod, PIAA bulbs, Stebal air horn, Scorpion SS pipes-(no DB killers), Speedohealer, HEL SS brake lines, Fenda Extenda, K&P SS re-usable oil filter, custom mounted BMW style electrical outlet(L.S.), Techmount GPS mount with handlebar bar risers/set backs, additional helmet lock, custom mod'ed seat(Spencers), Hyper light-rear running/brake light, custom radiator/fan protector, Techspec tank pads, Grip Puppies, Yamaha rear rack with custom aluminum flat rack.

  12. #19
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    Re: I want to replace my spark plugs

    Just did my plugs last weekend. A little over 10k on the original NGK's. They don't look bad other than out of spec, coming in at 0.825mm. I thought the bike sounded different after installing iridiums but I don't ride if full time, son does. I did note the boots didn't go back down as far are the iridiums a couple mm longer?
    Last edited by Heywood; 02-21-2019 at 09:02 AM.

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  14. #20
    2007 FZ6 TownsendsFJR1300's Avatar
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    Re: I want to replace my spark plugs

    ^^^

    Good info (same as what I found way back, exactly) but your boots should go all the way down...

    If you put some dielectric grease (very light coat) where the rubber boots meet the valve cover and a little inside the boot, they'll go on much easier and FULLY.

    You'll actually hear the caps snap on. Their very likely NOT on fully and may cause issues.. Grease em up!!
    Scott
    2007 Yamaha FZ6- BD43 headlight mod, PIAA bulbs, Stebal air horn, Scorpion SS pipes-(no DB killers), Speedohealer, HEL SS brake lines, Fenda Extenda, K&P SS re-usable oil filter, custom mounted BMW style electrical outlet(L.S.), Techmount GPS mount with handlebar bar risers/set backs, additional helmet lock, custom mod'ed seat(Spencers), Hyper light-rear running/brake light, custom radiator/fan protector, Techspec tank pads, Grip Puppies, Yamaha rear rack with custom aluminum flat rack.

 

 
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