running lean?
Posted: 09:32 am Feb 05 2010
my 03 220 appears to be running a tad lean just off throttle & sometimes bogs down just when when you want to start a gnarley climb, a few blips of the throttle seems to cure this but it has caught me out a few times.
mid range pull is strong as is the top end but on over run e.g throttle off going down a climb the bike sounds like its running out of gas.
ive stripped & cleaned the carb,measured the float height (which was fine).standard jetting,needle clip 2nd from the top, air screw 1.15 turns out instead of 1.30 (but bog still there)..im running fmf gnarly pipe with power core2 silencer also boysen rad valve with dual stage reeds,i also have the air box lid removed & the jetting is all standard & plug colour is a nice tan (irridium plug)...have tried 3rd clip from the top (needle) but bike ran too rich so put it back on the 2nd clip...im currently running the factory standard 32.1 mix & wonderd if i ran 40.1 perhaps the little bit extra gas & less oil mix would help cure my slight bog by richening the fuel delivery slightly..ive checked for air leaks etc & found none even fitted my standard reed valve etc but bog was still there & it didnt have the pull or mid range kick that the rad valve has..appart from this slight bog the bike runs fine & hauls ass .i havent owned the bike long & my last steed was a 525exc ktm...perhaps it just a 2 smoke kinda thing..what do you chaps think??
mid range pull is strong as is the top end but on over run e.g throttle off going down a climb the bike sounds like its running out of gas.
ive stripped & cleaned the carb,measured the float height (which was fine).standard jetting,needle clip 2nd from the top, air screw 1.15 turns out instead of 1.30 (but bog still there)..im running fmf gnarly pipe with power core2 silencer also boysen rad valve with dual stage reeds,i also have the air box lid removed & the jetting is all standard & plug colour is a nice tan (irridium plug)...have tried 3rd clip from the top (needle) but bike ran too rich so put it back on the 2nd clip...im currently running the factory standard 32.1 mix & wonderd if i ran 40.1 perhaps the little bit extra gas & less oil mix would help cure my slight bog by richening the fuel delivery slightly..ive checked for air leaks etc & found none even fitted my standard reed valve etc but bog was still there & it didnt have the pull or mid range kick that the rad valve has..appart from this slight bog the bike runs fine & hauls ass .i havent owned the bike long & my last steed was a 525exc ktm...perhaps it just a 2 smoke kinda thing..what do you chaps think??