Spark plugs??
#1
10-26-2010, 04:57 PM
Join Date: Sep 2010
Location: Lancaster PA
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#2
10-26-2010, 05:11 PM
#3
10-26-2010, 07:24 PM
#4
10-26-2010, 07:42 PM
I put in the double platinum tipped H-D plugs on my bike simply to not have to change them for many miles as the platinum should last considerably longer. Otherwise there is not a whole bunch of difference in performance from one spark plug to another as long as the heat range is the same.
A trick I was taught years ago on standard plugs was to use a side cutter and clip the ground back to uncover half the electrode. It helps uncover the spark somewhat and one thing I noticed on my car at the time was easier starting. I have seen plugs on the market similar to these.
A trick I was taught years ago on standard plugs was to use a side cutter and clip the ground back to uncover half the electrode. It helps uncover the spark somewhat and one thing I noticed on my car at the time was easier starting. I have seen plugs on the market similar to these.
#7
10-27-2010, 07:51 AM
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#8
10-27-2010, 09:21 AM
Seasoned HDF Member
#9
10-27-2010, 09:46 AM
Road Warrior
I played the normal-cooler-hotter plug game.
Check into the anti-knocj system and how it is dependent on stock plugs.
I was interested in it after I noticed the cooler differnce between the front plug vs the rear plug.
As in the case in all engines, the rear cylinder runs hotter than the front cylinders.
What you will often see is front plugs that are darker colored that the rear plugs. The rear plugs usally look closer to ideal in terms of fouling burn off.
So what did I do. I put hotter plugs in the front, and colder plugs in the back. Ran it for a while and the plugs look very close in color.
Problem. I found out that some bikes have pick anti-knock settings that is tied directly to the impedeance of the spark plug. Apparently in a engine knowck senerio, the spark gap resistance is lower and the engine compensates by doing someting.....not exactly sure what it does.
Anyway, I decided that the color differences between the front and the back was not worth the risk of screwing around with a key componet of the engine anti-knock system. SO the defual plugs went back in.
Check into the anti-knocj system and how it is dependent on stock plugs.
I was interested in it after I noticed the cooler differnce between the front plug vs the rear plug.
As in the case in all engines, the rear cylinder runs hotter than the front cylinders.
What you will often see is front plugs that are darker colored that the rear plugs. The rear plugs usally look closer to ideal in terms of fouling burn off.
So what did I do. I put hotter plugs in the front, and colder plugs in the back. Ran it for a while and the plugs look very close in color.
Problem. I found out that some bikes have pick anti-knock settings that is tied directly to the impedeance of the spark plug. Apparently in a engine knowck senerio, the spark gap resistance is lower and the engine compensates by doing someting.....not exactly sure what it does.
Anyway, I decided that the color differences between the front and the back was not worth the risk of screwing around with a key componet of the engine anti-knock system. SO the defual plugs went back in.
