Spark Plug Gap
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Cruiser
Joined: Aug 2011
Posts: 103
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From: Phoenix, Arizona
Spark Plug Gap
Hello All,
Recently have had a problem and have not had much luck finding the answer with countless google searches! I have recently changed the factory plugs on my 13 street glide for new factory plugs. I gapped them using a round gapper from autozone and put the electrode in the middle of the line at .40. When I went to start the bike it started real rough... I then checked the gap on the old plugs and one had the electrode right in the middle of the .40 line and the other was at .45. The bike seems to run fine going down the road, but doesnt fire up as nicely as she used to. I would appreciate any help from this amazing site full of experienced folks!
Thanks!!
Recently have had a problem and have not had much luck finding the answer with countless google searches! I have recently changed the factory plugs on my 13 street glide for new factory plugs. I gapped them using a round gapper from autozone and put the electrode in the middle of the line at .40. When I went to start the bike it started real rough... I then checked the gap on the old plugs and one had the electrode right in the middle of the .40 line and the other was at .45. The bike seems to run fine going down the road, but doesnt fire up as nicely as she used to. I would appreciate any help from this amazing site full of experienced folks!
Thanks!!
HDF Community Team
Joined: Nov 2012
Posts: 6,189
Likes: 2,419
From: USA
Put the old plugs back in, test the bike. Does it now start easily and run smoothly? If so, at least one of those new plugs is bad.
Replace one of the old plugs with one of the new plugs. Test the bike. Does it now start easily and run smoothly? That new plug is good. If it starts hard and runs poorly, the new plug is bad. Replace it.
Replace the 2nd old plug with the remaining new plug. Test the bike. Does it now start and run easily and smoothly? If so, both plugs are good and you've a different problem to chase down and correct. If it starts hard and runs poorly, this 2nd new plug is bad. Replace it.
Replace one of the old plugs with one of the new plugs. Test the bike. Does it now start easily and run smoothly? That new plug is good. If it starts hard and runs poorly, the new plug is bad. Replace it.
Replace the 2nd old plug with the remaining new plug. Test the bike. Does it now start and run easily and smoothly? If so, both plugs are good and you've a different problem to chase down and correct. If it starts hard and runs poorly, this 2nd new plug is bad. Replace it.
Thread Starter
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Cruiser
Joined: Aug 2011
Posts: 103
Likes: 0
From: Phoenix, Arizona
Thanks for the help guys! I figured i would just widen the gap just a little before trying the old plug trick and it seems to be starting better now. I will keep the old plugs just in case. Cant express enough how great this site is!!
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