my 1 yr old motor have worked perfectly up to a couple of days ago. first sign of prob occured when i was returning back home and all of a sudden the engine dropped revs. i stopped, topped up the oil coz it was giving me a signal, started and go with no probs. Then the day after i went out again, when i revved up to 4000 revs the motor was acting erratically. i stopped and checked the filters. they both had dirt in them so i cleaned them and off i went in again slowly 2000 revs. yesterday i attatched my clean spare tank and i clean fuel line to the engine and cleaned the engine filter again but to my dismay the same happened. To make it worse i couldn't even start the engine but found a nice guy and towed me in. anyone had similar experiences? iam waiting for the authorized mechanic but in the meantime im confused on what could have happened. could the injectors be dirty? and is it normal that the manual fuel pump tightens up like a vacuum?