Tried to help a friend today who kept stalling her 280 Raga. She thought it was her but when we got back to pits I adjusted her carb and took a putt. All seemed good until I hopped the front end and it died. Hmmm I thought and tried just holding the bike while bouncing the bike with the handlebars. Just like holding the kill switch for a second bog. Pulled the carb and adjusted float level and travel. Same thing. Pulled tank and disconnected kill switch, no change. Tapped and tugged various wires looking for intermittent, no change. I didn't have a flywheel puller so there was no way to get a visual on the stator.

Anybody else seen this kind of behavior? Any suggestions? Bike was apparenly stripped to weld frame over the winter.

 I think you might be on to something with the ground. I rode a Pro awhile back, that if I physically pulled the bike hard left it would die. I did not have the bike long enough to find out why. On my son`s Raga, it would die if it went up and down suddenly. I fixed this by drilling a second vent in the Keihin carb on the left side that looks like a blank. Stopped stalling by over 60%. Good luck.

I get the occasional bog charging up big hills at half throttle on my Gas Gas 2015 250 Racing, Keihin carb, I noticed if it's revved hard in neutral there is a small amount of fuel escapes from carb float bowl breather overflow pipe, my thoughts are that this may be causing a pressure difference in the carb resulting in fuel starvation. This used to happen with my KTM's when riding deep mud/water, the solution was to re-route the hoses and/or cut the hose end to 45 degrees.

Hi not a Gasgas but I had a problem with an old ossa mar stalled when you braked hard or bounced the front end down , took me a while to suss it but was the filter in the tank blocked cleaned it and was fine after that .

I'm leaning more towards electrical because the bog was immediate. She was going to bring it back to the guy who worked on it. I'm sure he'll be able to sort it out.

Learn something new everyday. Plug replaced and problem fixed thanks to Stewie at Jack's Cycles.

Ok problem not fixed. Rode with friend yesterday and she was stalling and blaming herself. I hopped on her bike for test ride and same problem. Still leaning towards electrics.

Sounds like a broken wire, or bad connection somewhere. There are not a lot of wyres, and most of them are not important for running so should be quite easy to test.

 

Without tank, with engine running, fiddle a bit with the wires.

Yeah local dealer did that to no avail. He did note her CDI isn't strapped in properly so I was thinking one or more of the wires might have work hardened from flexing and be intermittent. I also think pulling the flywheel off and checking the coil and trigger module screws/wires would be a good idea.

 There has been an issue with the pins in the connections sucking into the wiring harness and not making a good connection. Also the pins for the CDI. Just a thought. 

What year what carb?

Change the complete carb for one off another bike that runs ok (250/280/300 should be ok) and see if that sorts it.. this will eliminate the carb.... thats where I would start....

Ive had the same thing before and I cleaned the carb numerous times and tried differant float settings and still couldn't find anything wrong with it, fitted a new one and it sorted it...

Sorted with new carb. Waiting to get the old carb from dealer so I can dissect it and find out why.

Hurry up! want to see whats the cause........

Sounds like a leaking jet block gasket, had the same problem with a OKO carb.