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Which spark plug?

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Old Mar 14, 2012 | 09:59 AM
  #1  
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Default Which spark plug?

I finally got a chance to ride my bike for the first time this year and it's running like $hit! Gonna drain the gas and run some fresh with some fuel injecter cleaner through. While I'm at it may as well throw on a fresh set of plugs. I hope thus is all it is. Kinds weird though, it ran fine when I stored it. Filled the tank full with gas with sta bill and it sat in a heated garage all winter. Pulled it out twice and let it run for 20 min. Hopefully this isn't a bigger problem than fuel.

So what plug are you guys using? Don't think it matters but it's a 10 SG 96" w 555s, fat cats and a pc5.
 
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Old Mar 14, 2012 | 10:04 AM
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I run the standard 6R12 they're about $2 each at the dealer.
 
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Old Mar 14, 2012 | 10:32 AM
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If you used StaBil I seriously doubt it's a gas problem. Stock plugs are probably the best.
 
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Old Mar 14, 2012 | 10:38 AM
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It's not good to allow an air cooled engine to run for "20" minutes sitting still. Bad things can happen. Not saying that is your problem, but it is a well documented no-no.
 
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Old Mar 14, 2012 | 10:42 AM
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Use the stock H-D plug. Little anti-sieze, torque to specs, and might as well get
SE wires.
 
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Old Mar 14, 2012 | 11:30 AM
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A common mistake that many make is cranking it up during winter & let it idle for a little time. Idling for 20 mins doesn't allow the motor to get off the "rich" setting used for cold cranking. That can lead to a fouled plug. If youre gonna crank it, go ride it.

It may not apply to your circumstance but it does apply to many.

I like NGK or Autolites but have used Champions in the past. Normally I run 1 range cooler than stock.
I find that HD plugs are a bit too hot for my tune.

Buy what makes ya happy.

.
 

Last edited by Fast Aire; Mar 14, 2012 at 11:33 AM. Reason: opps
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Old Mar 14, 2012 | 11:32 AM
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Sta-Bil worked great on the earlier fuel blends. Todays fuels have alcohol in them, as much as 12-15%, sometimes even more, regardless of what the pump says.(10% max ethanol, etc.)
They have a new one made for fuel/alcohol blends like we use currently and it works MUCH better for storing anything over 90 days.
 
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Old Mar 14, 2012 | 01:42 PM
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Autolite and NGK work fine.
 
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Old Mar 14, 2012 | 01:47 PM
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Thanks for the tips guys. I just ran to the dealer and got a new set of plugs. I'm gonna syphon out the old gas (120 days) put in some fresh 96 and put those new plugs in tonight. I'll report back later.
 
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Old Mar 14, 2012 | 05:30 PM
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Originally Posted by monumaker
Thanks for the tips guys. I just ran to the dealer and got a new set of plugs. I'm gonna syphon out the old gas (120 days) put in some fresh 96 and put those new plugs in tonight. I'll report back later.
If I read this right you should be using premium fuel.
 
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