Question about 1996 Suzuki VS 1400 Intruder

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Front cylinder was running hot, rear cylinder running cool, bike stalled out, now won't start. Spark plugs won't fire.

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Could be a problem in you sparkplug boot, carbourator, or a stretched throttle cable.

Posted on Aug 27, 2010


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I have a 93 sportster 1200 thats kinda hard to start dosent want to idll

On pretty much ALL Harley's (and all other air cooled V-Twins), the rear cylinder runs hotter because the front cylinder tends to semi-block the airflow coming to it.

You have only one carb, so if it was jetted right for one cylinder, the other cylinder wouldn't be too far off.

Most likely from your description (rear cylinder quits how ever at above 1700 rpms, sputters from time to time on rear cylinder, rear plug is a lot cleaner than front one), I would look at an air leak (common on Harley's) where the intake manifold joins the rear cylinder head, and/or an exhaust leak at the rear pipe.

Feb 11, 2014 | Harley Davidson Motorcycles

1 Answer

Oil pressure stalls

not sure maybe the cylinders

Jun 25, 2013 | kawasaki VN 1500 Vulcan Classic...

1 Answer

2000 VZ800 marauder runs mostly on one cylinder

It seems there is too much of fuel going into the non firing cylinder thus the blackish spark plug, recheck the float level to that carburater and also check the valve clearance.

May 01, 2013 | 2000 Suzuki VZ 800 Marauder

1 Answer

2002 Suzuki Marauder VZ800 Front cylinder does not fire till bike warms up a bit?

Definately try a spark plug first. What does the old spark plug look like? ( white, oil fouled, melted, metallic?). Usually a fuel issue will make the inoperable cylinder very hot. Might have a loose valve guide in the head, or a bent valve.

Oct 18, 2012 | 2004 Suzuki VZ 800 Marauder

1 Answer

Rear cylinder is cool to the touch, the front one is hot

The spark plug on the rear cylinder isn't firing. Check the plug for fouling and make sure the spark plug wire is good and connected to the coil and plug properly. Also check the spark plug gap (0.040)

Jun 26, 2012 | 2001 Harley Davidson FXDL Dyna Low Rider

3 Answers

No spark to rear cylinders runs good and then runs on one cylinder 1986 honda shadow 1100

try switching the position of the two coils, the plug wires will unscrew off of the coils and that way you dont have to pull the spark plug wires too,(be sure and change the 2 wire couplers too) if your front cylinder stops firing you know its the coil, if the back cylinder still doesn't fire then your coil is good and you either have a bad #2 spark unit or a bad crank pulse generator.

Aug 05, 2011 | 1998 Honda VT 1100 C Shadow Spirit

1 Answer

The spark plug is only firing on the rear cylinder, I have replaced both plugs, both plug wires, and coil. all parts came from HD dealership and all parts are OEM replacement parts and still only fires on...

Swap the spark plug wires and see it the moves from the front cylinder to the rear cylinder. Your Sportster should have what is known as a "dual fire" ignition system. This means that both spark plugs fire every time the piston comes to top dead center whether the cylinder is on the compression stroke or the exhaust stroke. This causes what is known as a "wasted spark", the spark plug fires on the exhaust stroke. I don't have any experience with bikes made after year model 2000. Most of these bikes are equipped with electronic engine controls that I don't care to learn about. I work on bikes made in 1999 or earlier. I feel pretty confident that Harley still uses the "dual fire" ignition but I'm not sure if they have any other sensors on the bike that would cause the problem you have. Try what I suggested and it may give you a clue as to the problem. Other than that, I have no other suggestions. Sorry I couldn't do more.

Good luck

Jun 11, 2011 | 2006 Harley Davidson XL 1200 C Sportster...

1 Answer

After getting bike ready for season.the rear jug wasnt getting i replaced coild thinking it went bad.nope?.although after kepping it running for a period of cleared up and ran on both...

I'd replace the plug first.
If that isn't the issue, I'd go over the entire ignition system from top to bottom.
When yu changed the coil, did you also change the plug wire? sometimes they can crack, and they will arc to ground, so that the plug gets no spark....until the wire warms up and the crack in it closes enough that it doesn't arc anymore.

Mar 17, 2011 | Harley Davidson FXD Dyna Super Glide...

1 Answer

Still performance problems. ISOLATED cylinder(s)

Since you are getting sparks to all the plugs thn the problem could be tht of fuel to those two cylinders 2 & 3.
What was the condition of the spark plugs in those two cylinders? ( 2 & 3 ), were they wet or dry?
Try te following,
Swap the spark plugs form the firing cylinders and fit them to the cylinder 2 & 3.
Try to block up the air intake side of those two cylinder carburator and start the bike's engine see if they would fire, if they do fire thn theres a problem to those two carburators, fuel is not going into the combustion chamber, the problem could be float level , or the jets may need to be blown with compressed air.
Hope this helps!

Nov 21, 2009 | 1987 kawasaki ZL 1000 A1 Eliminator

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