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17.5 to #20 pilot jet, can someone explain a bit?

Posted: Sun Aug 25, 2013 10:21 am
by hahadumball
browsing the forums on xj mods as i was looking to give mine a little kick up the ass as its a little lacking (i got beaten by a mercedes off the lights)

its a 1997 xj 600s diversion.

was reading up on changing the pilot jet from the 17.5's to 20's, could someone explain why i would need to do this and what benefits if any will i get.

ive never really messed with jets other than on my ex girlfriends chinese 125 moped.

Possibly tomorrow if the weathers good i will be removing the carbs and giving them a big overhaul as they probably need it by now.