V-Twin Forum banner

1 - 5 of 5 Posts

·
Premium Member
Joined
·
2 Posts
Discussion Starter #1
I just put a S&S Super E on my 1984 FLHTC, which I run with open pipes. I have my intermediate jet down to .025 and have followed the S&S instructions for tuning. Still plugs (HD5R6A) are carbon following after about 5 miles. I am going to compression test in the morning, anyone have any other ideas?
 

·
Registered
Joined
·
74 Posts
Open or drag pipes are hard to tune. One reason S&S added an air bleed jet to their new carbs.
Engines tuned for W-O-T usually run too rich at low speeds.

Adding a thunderjet could help the high speed and allow you to tune for low and mid.

Read your plugs after riding at highway speed and shut down without idling.

Pull in the clutch, coast to the side of the road and look at your plugs color.
After you ride back and you let the bike idle you may see blackie carbon again.

You may also have a weak spark. It will cause soot on your plugs too.

Changing to muffler pipes could solve your problem and give you more power to boot.
 

·
Registered
Joined
·
93 Posts
Back off the accelerator pump adjustment. S&S seems to ship their carbs with the acc pump volume way too high. If you tend to goose the throttle alot, you'll soot up the plugs. Other possibility is if you are using the enrichiner, it will soot them up also, but after riding for awhile and everything is up to temp they should clear off.
 
1 - 5 of 5 Posts
Top