I have a 2003 suzuki intruder sv1400 GLP. Owner had it sitting for over 2 years. When he went to sell it he tried to start it and it wouldnt start. It only has 9k miles.. I bought it and immediately drained gas tank and lines . Pulled both carbs and thoroughly cleaned both put new battery on and changed the spark plugs knowing that it has been sitting and he tried to start it without draining fuel system. still wouldnt start. . I tested fuel pump and if engine had spark at both cylinders. Good. I took apart both petlocks the on/off/reserve one and the bottom of the tank one that was my starting problem fuel wasnt getting to carb cause the tank pet lock was clogged. Checked that both carbs are getting fuel . so now i got it running and its sounding rough. i tuned the idle in and then i start to give it some gas. (choke all the way off) and it's back firing at a little over 1/3 throttle Anything under that it doesnt back fire but anything after that is all back fire and sputter. and once it warms up the front cylinder where the front plug is on the right side of bike starts smoking WHITE smoke. its smells like burning but not rubber n not sweet like coolant. when I pull that plug there isnt any coolant or oil on bottom and bottom is Carmel color. back spark plug is still shiny. Also the front cylinder where smoke or steam is coming from is much hotter than other cylinder 8 think it is over heating but there is not smoke coming from exhaugst.