For some applications, our upgraded carburetor/manifold
combination cannot be installed due to clearance issues.
On race karts the carb or air filter may hit the right rear
tire. On barstool racers the carb may hit the foot rest
on the barstool. We offer this solution for the do-it-yourselfer. |
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You will need:
- One of our manifolds. You may choose a manifold with
or without a pulse fitting.
- A radiator hose which contains the desired angle.
For our race kart we went with a 45 degree bend. The
radiator hose needs a 1 1/4" ID.
- Two hose clamps.
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Cut the manifold in half. A band saw or hack
saw works great for this. Cut out the section of radiator
hose you plan to use. |
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First bolt on the head side of the manifold.
Slide the hose onto the head flange and clamp in place.
Slide the carburetor side of the manifold into the hose and
clamp securely. |
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We install a support brace from one of the carburetor
bolts, down to a shroud bolt to reduce vibration. |
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Complete setup installed. |
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Performance information for your Honda
GX160, GX200, GX340, GX390, Blue OHV clone provided by AGK. |
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AGK customer Tim Armstrong built an excellent version of
the DIY curved manifold. The following information was provided by
Tim. |
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Cut in half AGK
carburetor adaptor with pulse fitting. Purchased Car Quest
radiator hose part number 20661. Cut out tight 45 degree section
of hose. |
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Used 1/8" x 1/2" flat steel for support bracket.
One bracket is secured at the carb bolt on one end and at a fan shroud
bolt at the other end. |
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The second bracket secures the first bracket to the
cylinder head for extra rigidity. |
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Allen bolts were used to secure the flanges to the
cylinder head and carburetor. Notice there is plenty of clearance
between the carb and right rear tire. |
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Keeping the curved hose as short as possible helps
prevent vibration and keeps the hose from collapsing due to vacuum from
the piston. |
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The completed curved manifold has the carburetor
pointing straight back behind the engine. |
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Started 1st pull ran and idled very nice.
Left 22 mm Mikuni stock for a few laps to see what it felt like. Plug
showed it was lean, almost white. Placed the needle jet in the
middle slot and went to a 120 main jet. This adjustment made the kart
come to life. Checked plug after running and still a little lean so went
to a 125 main and that is where it is now and runs great. Air mixture at
2 turns out. I am very happy with the performance, thank you Tim
Armstrong... |
