Strange Problem With My Gasgas Ec300 Am Ready To Burn It,

[GasGas.ec300.Andy]

HI,
Guys now this is a strange problem i am having with my GasGas ec300 and wanted to see if anyone had some answers to it , I would like as many answers and ideas to try from diffrent people to run through before i burn it.
Right the problem i am having is that i can go out for about a hour or so with the lads and my bike will just cut out and wont start again not even with a tow off another bike ,I can get it back home into the shed put another plug in and it will start again.
I have had this bike for 2 years and never had a problem till now and its not a easy problem to pin point , I have used about 12 spark plugs upto now just to get out over a couple of weeks why has it started with such a wiered bloody issue.

 

[jostby]

If you have never had previous problems I suggest removing and cleaning the carb. If you are not comfortable doing this it would be a good idea to have help. It sounds like something is causing a slightly rich fuel condition... dirt in a passage or jet (which blocks the AIR needed to mix with the fuel). Only use compressed air to blow out passages after soaking in a cleaner or degreaser. Never use small wires or similar, they can actually cause the debris to plug the passage as you can't make the turns to push the debris out fully. Good luck!

 

[GasGas.ec300.Andy]

I might get the carb cleaned and setup again and see if that rules it out , Ive got to try everything one by one to get to the bottom of it.
I was think carb but with never having it off before thought i can not be that but dirt does get in.

 

[eff]

BTW, what year?

I had a problem this last summer where my bike started running poorly and then at one point just crapped out. My bike had never done this before and I had just changed the jetting, but I had only moved the clip. It seems in the process I got some dirt in it. All I did to fix it was pull the carb and clean everything real well and returned the clip.

I second the clean the carb suggestion.

 

[Hamish]

does it run ok for the first 1/2 hr?
If so, forget the carby.
Sounds like either a stator or a cdi failing when it gets hot.
Get a can or freezer spray and spray the cdi when it does it next and see if it will go

 

[d2w]

I second an electrical problem; running fine then dying then firing-up fine after a (cool down) time smacks of something electical. A connection is opening due to heat, and then closing when cooled. A dirty carb won't clean itself.

 

[jostby]

easy enough to isolate the problem,,, change the plug right when it happens. Save the old plug and check it for spark when you get home and the bike cools off. Got spark? Electrical issue. No spark? Fouling plugs. When it dies don't be towing it to try to start it if you are going to check the plug later as you will foul the plug no matter what by doing that. Good luck.

 

[Nick]

Had the exact thing happen on a KX and it was the CDI.

 

[crem55]

I had my 2000 gg 200 crap out on me in line for tech then after the gas stop and it was as simple as the new vent I put on my gas cap vent hose that was faulty

 

[GasGas.ec300.Andy]

Does any of you guys have a cdi unit for a 2001 ec300 or no if any other bikes carry the same one and will i need the sensor on the fly wheel to match the new cdi.
Cheers for all the advice upto now.

 

[Brian VT]

I had my 2000 gg 200 crap out on me in line for tech then after the gas stop and it was as simple as the new vent I put on my gas cap vent hose that was faulty

I'll 2nd that one, but my vent was stock and had gunk in it.
Free fixes are the ones to try 1st.

 

[GMP]

I'd put $$ on the gas cap, it has happened to me on my '07 and cost me a good finnish at an enduro. This has also happened to Fred Hoess a couple years back, talking to his mechanic at an enduro. The plug has nothing to do with it, just the time it takes to vent, then it starts again. Remove the rubber cap gasket and enlarge the pin holes or just cut the rubber away from the center. Next enlarge the holes in the plastic cap that retains the ball bearing valve. Clean, verify operation, and reassemble. I have also had the rubber gasket swell and deform from something in the fuel, so check this as well. Also, you don't need an external one-way vent valve, it just adds restriction and potential problems.

If that doesn't fix it, check the HV coil wire for solid connection at the cap and coil, then look at a faulty coil, stator, or CDI. The freeze spray technique is good for isolating a thermal problem.

 

[Malcolm]

Hi there I had exactly the same problem with my 2001 EC300. In the end I got this sorted out after having 20 or more brand new sparkplugs that didnt work in the GasGas. The strange thing is that once the plug dies in the GasGas, I put it into my sons KX65 and first Kick it starts. Here is what I did and it worked.

1) Replaced the needle -middle setting (Dont have needle number but can get it if needed.The needle was from KTM on recomendation from our national sponsored GasGas rider)
2) Set float level
2) Changed jet size ,I am at sea level so the jeting is 175 main 38 pilot
3) Rewound stator coil ( but I think this was not necessary)

I have purchased a 2007 EC300 and its done the same thing twice and the only thing diffrent is that I am running a 42 pilot jet not 38. Its not as bad as the 2001 which happend every ride, and the 2001 GasGas has never done it again> I hope this helps

 

[Boomhauer]

Andy,

Last weekend we had a club race and about half way thru the race my bike would not restart. I changed the plug whick looked perfect and it was still not fixed. When we got back to the camp/pit area I started looking at my fuel line & filter. There was a piece of trash stuck in the line right after the petcock. When I would rev the engine the trash would move and starve the fuel filter. I took the fule line off and put on a brand new line (I keep some in my fanny pack) and the problem was fixed. This was a first for me!

Maybe tank your tank off and flush the petcock and clean the carb really well. I will be doing this as soon as I can use my hands again.

 

[GMP]

A rule of thumb: On any new bike, flush and dump the tank (from the filler neck) a few times before riding it. You will be surprised at the amount of plastic shards left from the mfg. process.