40mm intakes

Discussion in 'Intake & Exhaust' started by crassius, Oct 5, 2017.

  1. crassius

    crassius Well-Known Member

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    Been using motors with 40mm intakes for a while now. Have them with aluminum intakes, but ordered some steel ones for spares. I'm finding that on a tight frame build, the carb often won't fit in the frame.

    I've found some steel intakes that give about an inch of extra room when needed.

    ON left side in pic below.

    ACMD0016.jpg ACMD0017.jpg ACMD0018.jpg
     
  2. CroMagnum

    CroMagnum Member

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    Where did you get the intakes?
     
  3. crassius

    crassius Well-Known Member

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    got them from BGF, but he looked thru his shelves and has no more of the short ones : (

    may take a while to find someone that still has them
     
  4. CroMagnum

    CroMagnum Member

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    Are these the same?
    http://www.ebay.com/itm/Intake-Mani...cc-W-Racing-Port-Matched-Gasket-/322213580185

    I also found some cast aluminum that appear to be short. Make that rough cast... ;)
    http://www.ebay.com/itm/Alum-Air-Intake-Pipe-40mm-Bicycle-Motors-Bicycle-Engine-Kits-/192211108245


    Of course, you could always go dual carbs.
    http://www.ebay.com/itm/Dual-Air-In...0CC-Engine-Gas-Motorized-Bicycle/252520204306
     
  5. crassius

    crassius Well-Known Member

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    steel onesnot same - says 32mm right on the ad

    aluminum ones appear to be the long ones that come with the motors

    the short, steel 40mm ones have a small round opening at the mounting point
     

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