Looking for help from the Evo gurus here please..
Seasoned HDF Member
Joined: Sep 2012
Posts: 6,570
Likes: 590
From: almost there
Plugs don't look that bad. Can only be 2 things. Spark or gas. could have coil going bad, and drain the float bowl, let a a 1/4 pint out to clear the lines.
.
.
Last edited by aces&8s; Sep 26, 2014 at 07:41 PM.
Road Warrior
Joined: Mar 2009
Posts: 1,471
Likes: 9
From: Toledo, Ohio
I added about 2/3 of a bottle of STP full fuel system cleaner to a tank of gas. That was about 2 months ago when my bike would sputter so bad, it just wouldn't go. Although pessimistic that it would produce any results, it sure did! I have not had one single issue since. It's a cheap first step to give a shot.
Trending Topics
Seasoned HDF Member
Joined: Nov 2010
Posts: 17,548
Likes: 7,197
From: Oxford, Nc
How old are your spark plug wires? (I replaced mine at 10 years old and 70,000 miles just on principle.)
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Seasoned HDF Member
Joined: Apr 2011
Posts: 6,185
Likes: 2,134
From: W. Texas
If the sputter presents itself during a high load I'd be looking for a cracked spark plug, coil wire or bad coil itself.
If while going say 50 mph and you have a need to slowly speed up or maintain speed while going up an incline. This is when the ignition system is loaded the most. Opps say using 4th gear, 5th would be lugging the motor. This needs to be done just short of lugging the motor
Just a thought WP
Not a guru, just a half *** redneck mechanic BG
If while going say 50 mph and you have a need to slowly speed up or maintain speed while going up an incline. This is when the ignition system is loaded the most. Opps say using 4th gear, 5th would be lugging the motor. This needs to be done just short of lugging the motor
Just a thought WP
Not a guru, just a half *** redneck mechanic BG
Last edited by WP50; Sep 27, 2014 at 10:33 AM. Reason: add