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Have a 05 yz250 never really grasp the full knowledge on jetting but I want some opinions on what I am currently running and if anyone has suggestions.

 

50 pilot

178 main

N3ew 2nd clip position

Running a 32:1 mix yamalube 2r or castor 927

No ethanol fuel

About 750ft above seal level and 85 to 95 degrees outside ga weather lol

Have stock exhaust on currently wanted to try it out. Have a fmf fatty and powercore 2 and a shorty don't really know which way to jet appropriately for the aftermarket set up. Thanks to all who have advice

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Yz250 jetting thread has some good info

imo and many will agree 

50 pilot is rich

N3ew is lean at 3/8 throttle and not very smooth 

178 main is very rich

 

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