Help with jetting/ too lean!

[EXDUNER127]

Does anyone know if there are any benifits of running the dyno jet kit needle with the regular keihn jets because after i got my head ported my bike was running way lean and i was running the the dyno jet 160, so i went back to the stock needle and put it on the 4th clip position and 75 main jet and i was still running a liitle lean, what should i do to richin up, should i go up to a 178 or 180 main. it ruined my riding time at the dunes??

[cals400ex]

thats weird. i have been told with a ported head your jetting should become richer, thus your carb is getting a better signal. my jetting became richer on the mainjet by a few sizes, so i had to go down on the mainjet. how do you know it is lean? i assume you meant to say a 175 mainjet not a 75?

[EXDUNER127]

yah i meant a 175 main, i know it was lean because it would back fire not loud but it did and out of the carb as well, but then at night it ran good. BUt when i would dune that next day to vendors row, i would have it full throttle and my bike would stall like it was out of gas and i wasnt?

[cals400ex]

i would take the carb off and clean it really well. also, make sure your intake boots don't have any cracks and make sure the boots are on really tight.

[EXDUNER127]

yah maybe i will try and clean it really well, but do you think the jet kit is usefull or no? or should i stick with the stock needle and jets?

[cals400ex]

i haven't used dynojets so i can't tell you. i hear the keihin jets seem to be easier to tune in, but i have no idea why.

[LazeR]

Personally, i would use keihin! Although i do have dynojets they are kind of a pain, they skip a lot of #'ers and its hard to fine tune! I'm still thinking about going back to keihin jets! and try to sell my dynojet kit on ebay or something

[EXDUNER127]

i have a new jet kit and was wondering wether or not i should use it? because it says it helps but others say it is a pain in the arse?

[EXDUNER127]

would it benifit to just use the dyno jet needle and keihn jets, because it has an extra grrove or is it made for the dyno jets only?