hello all, I have recently purchased a 1999 kx250. The previous owner had it since new and pulled the motor out to run in his go kart. IF hes telling the truth, the motors done only 40-50 hours and the frame 10-ish. It has a FMF Fatty chamber and FMF Muffler, weighted flywheel, VForce 3 Reeds, 52 tooth rear sprocket, new piston and rings and new clutch. i took it for a first run last weekend and when the throttle is open, it goes hard but when on a hill descent with no throttle, the engine feels like it wants to still push me forward in a 'pulsing' type fashion like its getting drips of fuel. When its hot its idle is also very pulsed, not a smooth purr like i thought it should be. also the bottom end feels alot less than i remember when ive previously ridden an 07 kx250 and also a 05 cr250. can anyone help with any ideas or solutions?