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--- tecnica:motori:honda_ntv650_carburetor [2026/04/08 22:21] – [Problem with Keyster valve seat] niccolo
+++ tecnica:motori:honda_ntv650_carburetor [2026/04/08 22:34] (current) – [Problem with the Keyster valve seat] niccolo
@@ Line 101: / Line 101: @@
 It seems that also the Keyster kit **K-976EK** is compatibile with the NTV650 Revere, it contains fewer parts, but it contains the same rubber parts as the **KH-1348** kit, plus the oval O-ring of the air cut-off valve. Another kit from Keyster is the **K139** (also labeled **NTMOR-007G**), which includes only the float chamber gasket.
-===== Problem with Keyster valve seat =====
+===== Problem with the Keyster valve seat =====
-After overhauling the carburetors with the Keyster kit, I had a problem with the float valve seat, even though I had adjusted the float height according to the manual (9.2 mm). After a few kilometers, fuel began dripping from the carburetor vent tube; evidently the valve wasn't closing, and the float bowl was overfilling.
+After overhauling the carburetors with the Keyster kit, I had **a problem with the float valve seat**. Even though I had adjusted the float level according to the manual (9.2 mm), after driving for a few kilometers, the fuel began dripping from the carburetor vent tube. Evidently the valve wasn't closing, and **the float chamber was overfilling**.
-To confirm that the fuel level was the problem, I connected two clear rubber hoses to the carburetor drains. The hose was then bent upward, above the fuel cap. By opening the drain screw, you can see the fuel level in the hose, which will be equal to the level in the float chamber. After a few kilometers of driving, I noticed that the level in one of the two carburetors had risen several centimeters and was now reaching the breather pipe.
+To confirm that the fuel level was the problem, I connected two clear rubber hoses to the carburetor drains. The hoses were then bent upward, above the fuel cap. By loosening the **drain screws** of the carburetors, you can see the fuel level in the hose, which will be equal to the level in the float chamber. After a few kilometers of driving, I confirmed that the level in one of the two carburetors had risen several centimeters and was now reaching the breather pipe.
-When I removed the carburetor, I noticed that the Keyster replacement had different dimensions than the original, both the valve seat and the washer. To be safe, I reassembled the originals, and the problem was solved.
+{{.:honda_ntv650:keihin-carburetor-inspecting-fuel-level-in-float-chamber.jpg?direct&400|Inspecting the fuel level in float chamber}}
+When I removed the carburetor, I noticed that **the Keyster replacement had different dimensions than the original**, both the valve seat and the washer. To be safe, I reassembled the originals, and the problem was solved.
 {{.:honda_ntv650:keihin-carburetor-valve-seat.jpg?direct&400|}}