Differences

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--- tecnica:motori:honda_ntv650_carburetor [2024/09/23 10:15] – [The air cut off valve] niccolo
+++ tecnica:motori:honda_ntv650_carburetor [2024/09/24 10:31] (current) – [Replacing the diaphragms at 100.000 and 200.000 km] niccolo
@@ Line 1: / Line 1: @@
 ====== Honda NTV650 Revere - Carburetor ======
-The Honda NTV650 Revere mounts two **Keihin** vacuum piston carburetors. Each carburetor has also an **air cut-off valve** driven by a small membrane.
+The Honda NTV650 Revere mounts two **Keihin** vacuum piston carburetors. When servicing the carburetors, it must be kept in mind that in addition to the **vacuum piston diaphragm**, there is also a small diaphragm that operates the **air cut-off valve**.
 Here it is my experience in **replacing the diaphragms** and some information on the little-known **air cut-off valve**.
@@ Line 27: / Line 27: @@
 In the following picture you can see the mounting position of the diaphragm, seen from below:
-{{.:honda_ntv650:diaphragm-position.jpg?200|Diaphragm original position}}
+{{.:honda_ntv650:carburetor-diaphragm-alignment.png?240|Diaphragm alignment}}
+{{.:honda_ntv650:diaphragm-position.jpg?240|Diaphragm original position}}
 ===== Jets and pilot screw =====
@@ Line 43: / Line 44: @@
 The **factory settings** are likely to be for a **very lean mixture** at idle, which is also why the cut-off valve is needed. This setup is required to meet stringent pollution regulations. It may be that the best idle performance is achieved with a richer mixture (pilot screw turned out more than two turns). A richer idle also reduces the possibility of afterburn (exhaust popping) when the throttle is released.
-===== Hoses position =====
+===== Fuel and breather pipes placement =====
-In the following photos you can see how the fuel line and the breather tube are positioned around the carburetors. This is how I found them in my 1991 Revere, but I found other models having the breather tube going to the right side, in a mirror-like way.
+In the following photos you can see how the fuel line and the breather tube are positioned around the carburetors (the lower end of the breather pipe should be inserted into the binder, together with the fuel pipe). This is how I found them in my 1991 Revere, but I found other models having the breather tube going to the right side, in a mirror-like way.
 {{.:honda_ntv650:ntv650-revere-carburetor-front-bottom.jpg?200|}}