First plug change - requesting comments please
Road Warrior
Joined: Dec 2012
Posts: 1,539
Likes: 692
From: magnolia tx
The pipes don't look too bad, if the bike just sat round and idled, on those plugs I wouldn't worry about it yet, run the bike on your new plugs then check it, excessive idling isn't good for an air cooled engine
Seasoned HDF Member
Joined: May 2008
Posts: 21,031
Likes: 12,555
From: South Carolina
As Mike131 said, I wouldn`t worry too much about the plugs, put some miles on the bike.
Plugs are hard to read with todays fuel and ignition systems, my bike (89 Evo Softail CV carb) was running rich (33MPG) because of an issue with the enrichener, but the plugs looked perfect...
Plugs are hard to read with todays fuel and ignition systems, my bike (89 Evo Softail CV carb) was running rich (33MPG) because of an issue with the enrichener, but the plugs looked perfect...
HDF Community Team
Joined: Dec 2005
Posts: 5,375
Likes: 2,572
From: NC USA
I agree. Don't start chasing a problem that may not exist. Plugs will always smoke up on a cold start, especially the rear. It takes some miles under load for them to get hot enough to "self clean" which they are designed to do. With these modern ignition systems, actually fouling a plug to the point of misfire is basically non-existent, absent of a major issue.
But from the looks of those plugs... if you put new ones in, ran them several hundred miles and they look the same, I'd wager someone put a shim under the needle. All that does for a normal road bike is ruin your fuel mileage and turn your plugs reddish orange.
But from the looks of those plugs... if you put new ones in, ran them several hundred miles and they look the same, I'd wager someone put a shim under the needle. All that does for a normal road bike is ruin your fuel mileage and turn your plugs reddish orange.
Grand HDF Member
Joined: Oct 2006
Posts: 3,651
Likes: 705
From: DFW
I would pull the carb and go through it so you can see what's in it and figure out if you have a problem or can rule it out as an issue.
CV carb parts: https://cv-performance.com/
CV carb parts: https://cv-performance.com/
Seasoned HDF Member
Joined: Oct 2007
Posts: 8,852
Likes: 2,493
From: Decatur, Alabama
Those plugs look oil fouled to me. You say you oiled your plug threads before you put them in? How much oil did you use? I wouldn't touch the carb for now. Put a new set of plugs in it (no oil on the threads) and put some miles on that thing. Pull the plugs after 5k miles and then see what they look like.
For what it's worth (probably nothing in an EVO thread) I've had to replace a bad plug or two on my ironhead in the past. ALWAYS carried one on a two stroke dirt bike. It won't hurt to carry a spare.
carl
For what it's worth (probably nothing in an EVO thread) I've had to replace a bad plug or two on my ironhead in the past. ALWAYS carried one on a two stroke dirt bike. It won't hurt to carry a spare.
carl
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