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167.5 or 170 main jet?

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  • 167.5 or 170 main jet?

    2003 roadstar 1600 I have a barons needle jet set on fourth clip, 37.5 pilot jet, the grizzly fuel valve and needle, cobra pipes that appear to have baffles removed, and a bak. I have cleaned carb throughly and put in all these new parts to go pump less. I have the pms set at 2.5 turns out. Everything on this site says 167.5 main but baron says 170 or even a172.5. I am not a mechanic just mechanically inclined. My thoughts are either should work it will just need to be tweaked based on which one I use, Please provide thoughts. I bought both the 167.5 and 170 from jetsrus. I am waiting on a new emulsion tube from partzilla so I have a few days. Thanks for your time.

  • #2
    167.5 for 1600
    "I'm Ricky Bobby. If you don't chew Big Red.....then Fuck You"

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    • #3
      the 167.5 is for a bike with baffles. I know the Barons instruction calls for a step up in main jet size for bikes without baffles. I think I would use the 170 if I was gonna run without baffles. The 170 will even work for a bike with baffles but will be a little heavy at WOT

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