Question about 1994 Ducati 400 SS
Check the plug, the gap in the points. Or better still change it. Check if the other cylinder is enough current to produce blue spark. The HT cable may be loose.
Posted on Sep 09, 2010
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Posted on Jan 02, 2017
Check to see if you have an exhaust leak at the rear cylinder. A slightly leaking exhaust gasket can cause this.
Posted on Oct 22, 2009
Testimonial: "we have already replaced both gaskets"
I'm trying to think away the possibility of a burt vave. Have you run the valve adjustment? Carb adjustment is very critical, Too lean will cause backfiring or stumbling and too rich will cause deccel popping at the exhaust. One other thing, Vacuum leaks screw everything up so it wouldn't hurt to ck all the vacuum lines make sure of no cracks or loose fits. Safly, you may need to just run it out and hope for it to clear up.Make sure the plug wires are not laying on anything. Take some electrical spray cleaner and rinse og the top of the coilnd the plug wire. I'll keep thinking on this and if I stumble on anything I'll you know. Ned
Posted on Nov 14, 2009
How good did you clean the carbs? The idle jets usually have small holes along the side, and if they are blocked with dirt or bad fuel, it won't idle. Make sure ALL of the passages are clear, and all jets are clear, through the center and holes in the sides of the pilot jets.
Posted on Aug 03, 2010
SOURCE: Front cylinder of my 1982
If you are sure it is getting a spark; you have pulled the wire and verified spark to plug when plug is grounded to the frame.... Then you should check the carb to be sure it is getting fuel to the bowl. There should be a screw near the bottom of the float bowl; loosen it and watch for fuel to flow out the drain hole. If no fuel flows you can tap lightly on the bowl with handle end of a screwdriver to try and loosen the float shutoff to allow it to fill with gas. If the bike was put up wet or got dirty gas you may have to rebuild/clean the carbs very well to correct the problem. Do be sure to clean up any gas off of engine before letting the engine warm up to keep from having a fire hazard. If gas flows and you have spark it may actually be bad gas or water in gas. For water in gas the easiest thing to do is add a bottle of rubbing alcohol; as close to 100% pure you can get. The alcohol will mix with the water and you will get less sputtering and missing while you run the tank thru.
Posted on May 11, 2011
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