06' Bog at WOT

[Exrider434]

Alright///y buddy has a 06 YFZ and he claims it has done this since new...but i know it didnt..Well anyways when you first punch it like to hit a jump it has a huge bog and will stall occasionally.. What might cause this? He does have the baffle out of the stock pipe with no rejet...If thats the problem, then what would the best jet size be?

[leveldrummer]

the bog is a common thing among yfz's, rejetting it will help a ton. it should have been jetted when it was stock, make sure he replaces the leak jet too, thats a big part of it. most people prefer a 35.