they say www.atvoutfitters.com has good deels on hmf pipes and power kits. if you buy their power kit you get jet and a filter. for the needle as you ask about you have to get a dynojet kit. it has jets and a new adjustable needle.
the needle allows you to fine tune the fuel delivery system. the hmf, jetted with an aftermarket filter like a uni or k&n will give you more power on the low end. definately a good investment.
the needle allows you to fine tune the fuel delivery system. the hmf, jetted with an aftermarket filter like a uni or k&n will give you more power on the low end. definately a good investment.