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Title: '00 M750 Carbed/ Bad spark? Post by: J-Cee on September 28, 2013, 09:40:27 AM I've been having rough running issues with wet plugs. I shot a quick video. Weak spark?
http://youtu.be/PKzCHga1wD8 (http://youtu.be/PKzCHga1wD8) Title: Re: '00 M750 Carbed/ Bad spark? Post by: Howie on September 28, 2013, 01:18:08 PM Spark looks OK. Check the needle jets for wear. If they look oval (use a magnifying glass if needed) replace the needles and jets.
Title: Re: '00 M750 Carbed/ Bad spark? Post by: J-Cee on September 28, 2013, 01:37:08 PM Factory pro jet kit and emulsion tubes on the way. If this doesn't fix it what else could it be?
Title: Re: '00 M750 Carbed/ Bad spark? Post by: koko64 on September 28, 2013, 04:01:18 PM 1. Leaking vacuum fuel tap (usually one cylinder)
2. Float needles not seating very well due to crud or ethanol eroding the rubber tips 3. Fouling due to using hi octane fuel in a low comp motor Howie is correct however (an elder statesman around here) with replacing the oem needle jets, etc, they wear very quickly (sometimes in 5000 miles). If there are other issues you have lost nothing and gained smoother running, better response and improved fuel economy. Worn needle jets are at least part of the problem and the first item to service with these symptoms. Title: Re: '00 M750 Carbed/ Bad spark? Post by: J-Cee on September 28, 2013, 05:16:53 PM Thanks guys! I'll let you know how it turns out.
Title: Re: '00 M750 Carbed/ Bad spark? Post by: memper on September 28, 2013, 08:05:30 PM Factory Pro supplies titanium emulsion tubes.
Title: Re: '00 M750 Carbed/ Bad spark? Post by: J-Cee on September 30, 2013, 06:27:38 PM Just realized that the ground strap from the engine to the frame was disconnected from the frame. This could definitely cause weak spark. Where does this bolt to the frame? It's on the right side behind the rear brake fluid reservoir.
Title: Re: '00 M750 Carbed/ Bad spark? Post by: ducpainter on September 30, 2013, 06:33:50 PM Just realized that the ground strap from the engine to the frame was disconnected from the frame. This could definitely cause weak spark. Where does this bolt to the frame? It's on the right side behind the rear brake fluid reservoir. It attaches to one of the rear set bolts via a nut on the back side of the bracket.Title: Re: '00 M750 Carbed/ Bad spark? Post by: J-Cee on September 30, 2013, 06:42:29 PM Okay. I may just run a new ground straight to the battery ground.
Title: Re: '00 M750 Carbed/ Bad spark? Post by: J-Cee on October 04, 2013, 04:52:18 PM Jet kit installed. Runs awesome!!
Title: Re: '00 M750 Carbed/ Bad spark? Post by: koko64 on October 04, 2013, 07:28:36 PM [thumbsup]
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