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300EX dount run good
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Posted by: big bad beny

towerd the end of middle and top end the motor cutts out.

eny help would be great
thanks

Posted by: jay's 300

Have you rejetted your carb and if so what size main jet are you running?

Posted by: Cody_300ex

Sounds like your a lil rich. You might wanna do a plug check.

Posted by: big bad beny

Its not my jeting done put every jet i got in it no change.
I put my jeting back to were it was to begin with.

118 main jet

its got a dynojet kit in it
its been in there for almost a year

Posted by: hardkoratvmxr

118 seems way to low i run a 125 with just the hmf slip on and k&n and closed airbox

Posted by: gratzracing24

check your ignition coil mine was doin the same thing i re jetted it and it worked fine for about a week and started to do it again put a new coil on it and its been working fine

Posted by: ethanp87

118 is way to lean they are 122 stock what have you got done to it pipe ext...or have you had it apart lately.

Posted by: big bad beny

mine came with a 120 main jet stock.

Port and polish 40 over 11:1 comp HMF slip and white bros header

Posted by: ethanp87

i would go to a 130 or 132.

Posted by: hardkoratvmxr

i would get these jets 130 132 135 and 138

Posted by: hondardr4life

Dang, that is really lean to run with that setup!!! Richin it up to around a 130 or so.