have a 07 650 v-star custom 17676 on the clock mostly hiway miles. This thing starts good hot or cold and runs great.......for about ten minutes then as you continue usually about 65 it dies pack to 1/4 power.....sometimes it will even die completely ....crank it back up no prob....1/4 power till the bike completely cools then same again.. I have changed the fuel/ filter/coils/cdi box/ fuelpump/had the tps checked/went thru carbs/checked timing three times (valve timing) bypassed the ais.......hellllpp!!!!!!! any ideas ANY IDEAS profuse thanks will b in order.