ok guys and gals, i have been reading the stuttering thread very closely and thought it time to ask for your help with my partners 600. if it was mine then i could just be patient and tinker whenever but its the bosses, so the clocks ticking
ok very quick rundown on prob....bike starts on the button ( even cold ) , ticks over lovely. give it a good handful and it bogs and i mean bogs down so bad until throttle is released. tried a road test, bike will not under any circumstances lift above 4000 rpm giving a top speed at present of 50 mph...........just over scooter territory
. this is even gently easing the throttle open, no hope in hell of whacking it open. there is a definite stutter when throttle is eased open and hand is placed near end pipe. ok enough of symptoms for now quick rundown on what i have checked, replaced ect. bear with me. cheers
fuel system........new clean (?) fuel in tank. petcock filter clean. all fuel lines cleaned and compressed air blown through. new fuel filter. fuel pump tested and working correctly. carbs dismantled and cleaned thoroughly 4,yes,4 times. all spotless and adjusted correctly. ( 2 turns on pilot ) even tried those set at 3 turns out and up to 1 turn out. float heights all set in spec. no difference!!!!!!!!!!!!!
ignition.......tested right from pick up coil to spark plugs with multimeter. ( all resistance readings in coils (primary and secondary) circuits within spec). fitted new plugs. and plug caps. everything in theory is fine. even checked valves in desperation ( well inside spec only 11500 on clock ( 2000 bike ).
finally as last resort, even ran a seperate fuel supply from a bottle directly to carb rail ( bypassing pump and even filter ). still no difference whatsoever !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
so its over to you fellas for input pretty please.all suggestions greatfully received. already got the ak47 and sidewinders ready so dont include those !! thanks chaps. cheers Ade.......will try and get a vid up at some point. ( fingers crossed )