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spark plugs

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  #81  
Old 18th August 2016
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I've always heard Champion made plugs for Harley and I've always used Champion H8C's or H10C's 10's being a lil hotter.
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  #82  
Old 19th August 2016
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any recommendations for 12 mm second plug
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  #83  
Old 14th June 2017
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Depends on the reach, and whether you want an extended tip and if you are running electronics you should be using resistor plugs.

Other than that I would look for a NGK 6 or 5 that fits those specs.

And then buy a box or 2 of them so you don't have to look for them when you need one.
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  #84  
Old 5th April 2020
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Looking through this topic I see many errors.

Like the Autolite 4316, this is a POINTS ignition plug. And has a heat range of 2! So may not be well suited for points even.

You should be using a Autolite 4123 or NGK BPR6HS or Champion RL82YC

EVERY (nearly) electronic ignition should be using resistor plugs to prevent interference with the electronics. Check your ignition manual......
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  #85  
Old 6th April 2020
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Denso Iridiums always seem to get a good review and even in here many like them....well, doesn't seem like my bike cares for them.....tried them twice, 50 miles each time....each time they came out very clean, but the bike just didn't seem to run as well as it does with NGK standard copper plugs. Maybe I am using the wrong ones....IXU22 5308 gapped at .035 .,,,Anyone else have a similar experience?
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  #86  
Old 6th April 2020
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Exotic plugs only advantage is to lighten your wallet.
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  #87  
Old 7th April 2020
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Quote:
Originally Posted by ryder rick View Post
Exotic plugs only advantage is to lighten your wallet.
But on the good side the lighter the load on the cycle that faster the acceleration, yes?
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  #88  
Old 7th April 2020
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Quote:
Originally Posted by glbsportster View Post
But on the good side the lighter the load on the cycle that faster the acceleration, yes?
What year bike are you putting these in, your ‘09??
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  #89  
Old 8th April 2020
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Quote:
Originally Posted by doodah man View Post
What year bike are you putting these in, your ‘09??
Yes, 1200C 2009 Tried the same ones twice (once about 6 months ago and now once 4 days ago), 50 miles each time,,,they came out nice and clean, but bike didn't run as smooth as before with the NGK standard stock ones for my bike and that is what is in the engine now and it is back to running fine now....maybe one of the plugs is bad, if that is possible.
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  #90  
Old 8th April 2020
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I been runnin ngk's for years and been playin with heat ranges for around 3 years.bpr5 hs in the front and bpr 4 hs rear.a little hotter in rear and for me this combo works great
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