Starts just fine but bogs and never comes out of it. Has some kind of keihin pj carb on it. Idle jet is 60 and main is 150 i beleive. Ran perfect last time i rode it now just bogs. Cleaned carb and still does same thing. I mix my gas about 40:1. The last owner said this lt250r has been ported and bored .80 over. Need help to get running