When you start the quad, it idles fine, accelerates fine, then bogs, like it's running out of fuel, will idle fine, if you shut it off and restart it it does the same all over, cleaned lines, drained and refilled fuel, cleaned carb, was thinkin it was the diaphragm on the slide, does this sound famliar to anyone? Thanks

 

Did you try to clean the float bowl? I know on my 01' if I put my on/off for th fuel on on it runs like crap.. I have to keep it on Res. for it to run ok... May not be your issue but worth a try .. you never know ...

 

I actually thought of that, it runs the same either way, and I did clean the float bowl, removed all the jets, sprayed with carb clean and blew with air, thats why I'm thinking it's the diaphragm, there's nothing left that I can think of.