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Message: [QUOTE="MXP1MP, post: 1042807, member: 20581"] I ended up jetting mine alittle leaner over stock actually one leaner on the pilot to a 37.5 and the clip pos to #2 mine was running alittle rich stock. Def get the Vforce for it that helped get ride of that bog it sometimes get. The stock reed block looks alittle more restrictive than it should be more like yamaha was alittle conservative when it came to the stuffer piece. I just put the factory fatty on mine with the shorty ran the stocker for a good while since aug and the FMF is not a oem copy different bends and cone shapes. It really helped out my 144 the stocker felt like it was choking it off up top only minus is the bigger cones blocks oil filler hole access some. Glad I got it and if you think it's fun stock should try my EG 144 :) you won't ride it stock again. [/QUOTE]