We had fun with this one. Our customer just purchased this killer used WR250X and wanted a list of preseason work do be done. Some new chassis bearings, full tuneup, chain and sprockets, billet platform pegs, along with some air box modifications, @fmf73
header to complement the FMF muffler, and a @dynojetresearch
PCV with ignition control. After tuning she really woke up with a significant increase in both power and torque. This bike is a riot to ride.