Help!!!
Thread Starter
|
Intermediate
Joined: Nov 2012
Posts: 31
Likes: 0
From: Cantonment
Help!!!
Hey guys I need some help fast. I have a motorcycle safety course on Thursday and my 91 FXLR will only fire on the front cylinder for about 15sec after start, then it only fires on the rear alone. I have spark, and fuel. Rear cylinder is fine. Ive swapped Coils with a buddy, switched the wires around, and changed wires and plug. Im lost please help.
Dirt don't hurt
Joined: Jan 2011
Posts: 21,065
Likes: 4,561
From: Haslet Texas
Hey guys I need some help fast. I have a motorcycle safety course on Thursday and my 91 FXLR will only fire on the front cylinder for about 15sec after start, then it only fires on the rear alone. I have spark, and fuel. Rear cylinder is fine. Ive swapped Coils with a buddy, switched the wires around, and changed wires and plug. Im lost please help.
Thread Starter
|
Intermediate
Joined: Nov 2012
Posts: 31
Likes: 0
From: Cantonment
Stock HD ignition.
It still wouldn't fire on the front cylinder. Id keep the bike running and disconnect the front plug wire and idle would not change. disconnect the rear and obviously the bike would die.
Carb
It still wouldn't fire on the front cylinder. Id keep the bike running and disconnect the front plug wire and idle would not change. disconnect the rear and obviously the bike would die.
Carb
Trending Topics
Dirt don't hurt
Joined: Jan 2011
Posts: 21,065
Likes: 4,561
From: Haslet Texas
(on the coil switch the wire positions)
This is a dual fire coil right?
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
Ultimate HDF Member
Joined: Aug 2012
Posts: 6,470
Likes: 4
From: on the road
kind of odd it only runs 15 seconds,It might make you think of a intake leak but not quite the right feel for that with the long range description.When it does run does it run strong or is it weak????
you dont have stainless wrapped plug wires do you??
next thing is a leak down test might be a good idea------------just to rule out issues and to work backwards.When you are short on fuel you can sometimes get enough air and fuel to mist one cyl but not 2 .my old shovel would only run on the back cyl when it ran out of fuel but it would run 5 miles like that.No one could explain that and lots gave theories
you dont have stainless wrapped plug wires do you??
next thing is a leak down test might be a good idea------------just to rule out issues and to work backwards.When you are short on fuel you can sometimes get enough air and fuel to mist one cyl but not 2 .my old shovel would only run on the back cyl when it ran out of fuel but it would run 5 miles like that.No one could explain that and lots gave theories
Last edited by 3408pete; Apr 16, 2013 at 08:58 PM.