engine dies when hot Please Help

mastershake

Ok here is what happens After starting the bike fine I can run it for about 5 min. then when it is hot it first will just die going down the road like the fuel shut off it boggs down and dies. I can start it back up and maybe make it couple hundered feet before same thing again. And just gets progressively worse until it is stalling as soon as you put it in gear with the clutch still pulled in. I have gone through the clutch and replace the throw out gear and lubed cable I am happy with the clutch the bike rolls freely when in gear with clutch pulled in that tells me this is not a clutch dragging issue. The wierd thing is when this happens it will idle in neutral all day long but stalls / dies as soon as you kick it into 1st gear. Everything is fine before the bike gets hot. I have checked the coil it is fine 2.5 to 2.9 ohms cold and hot this was my first guess. Voltage is 13.9v at battery. It will run with ground off battery. I was going to check the TCI unit but was looking for some educated guesses first before I start in the wrong direction. Thanks A lot let me know if you need any more info.

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Yamaha xs650