2001 yamaha yz250f jetting specs!

i recently rebuilt my 2001 yz250f with the following parts:

-Ported head

-stroker crank

-290cc big bore kit

-stage 2 hots cams

-full fmf pipe (powerbomb header & powercore 4 muffler)


can anybody help me with what jettting specs i will need for this or give me an idea on how to figure it out?

hard to say with no air info!


if you are keeping the ELP needle (stock for 01)


clip 3

168MJ (may go to 165 or 162)

40pj (may need 38)



lots of new parts on the 13yo bike.  at least the carb is easy to get to!

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