Set the spring and large diaphragm (including the aluminum part connected to the large diaphragm) aside. The vacuum hose connects to the outer plate. You will need to remove the vacuum hose and plug the hole on the intake port. Так же у нас есть доступ к программам по подбору запчастей для таких мотоциклов как BMW, Honda.Europe, Suzuki.Europe и прочие источники информации. Push the small rubber diaphragms foot through the plastic piece’s hole such that the flat side of the plastic piece faces away from the diaphragm.
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This model also had a 180° deg crank firing engine as with the nc21, but redline was raised to 14000 rpm. Additionally, it is necessary to remove the vacuum hose from the intake and plug the intake hole with a screw. Act accordingly by being more cautious about how you use the fuel tap. Once the last screw is removed, parts can fall out easily. The bleeder hole may be shorter on some fuel taps. As the engine turns, it creates a vacuum in the intake between the carburetor and the engine. A hose is run from the intake to the vacuum connection. The problem is, the diaphragm does not allow enough fuel to flow during long term wide open operation, as is common for racing. Screw it all together, making sure not to pinch the rubber diaphragm in the wrong way. The pictures show it in two steps for clarity. When the engine is turning (by the starter motor, or because it is running on it’s own), vacuum is generated that sucks the diaphragm out and allows fuel to flow. Regardless, the fuel tap should not be left in the open position when the bike is not in use (close the valve at the end of a race day). Also, initially, monitor the fuel tap to make sure it doesn’t develop a leak soon after making this change.
Leaks may not appear until after riding for a while. Remove the metal part the hose attaches to and plug the hole with an appropriate screw and washer (look at the other intakes for an example of the screw/washer). The vacuum hose cannot be attached to the fuel tap anymore. Since the large diaphragm was removed, attaching the vacuum hose to the fuel tap would allow open air to be sucked into the intake through the vacuum hose, adversely affecting the jetting for that cylinder. На этой странице представлены каталоги запчастей (фиши, микрофиши) для некоторых популярных моделей мотоциклов и скутеров.
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- The pictures and description here should help clarify things.
- Remove the fuel tap from the fuel tank.
- The fuel tap is made up of two plates (a middle plate, and an outer plate) and the actual tap or valve.
- Remove the four Phillips screws holding plates to the valve.
- The picture to the right shows the plates loosely held on by one screw.
- Take it apart slowly so as to note how it goes together in case you have to reverse this procedure.
When the engine is turning, vacuum from the vacuum hose sucks the large rubber diaphragm away from the valve, which opens up the fuel flow. Если Вам требуются какая либо информация по Вашей модели мотоцикла — не стесняйтесь, пишите в контактах! The NC30 reflected the styling of its iconic bigger brother, the VFR750R (RC30), right down to its 18-inch rear wheel. Refer to the HRC diagram above and the pictures for clarification. Upon disassembly, youll have the parts shown here. These pictures show what the HRC diagram was trying to portray. (The spring was used only to prop up the plate and diaphragm while taking pictures. It is not needed.) Re-assemble the fuel tap, but without the spring, the large rubber diaphragm and aluminum metal piece connected to it.
- The large connection to the right is the fuel output.
- The smaller connection on the center, pointing to the right, is the vacuum connection.
- This connects to the vacuum hose coming off the engine intake.
- The third connection, pointing down, is the bleeder hole.
- Inside the fuel tap is a rubber diaphragm that is normally held closed by a spring, preventing fuel flow.
There are two cavities, the vacuum cavity where the spring came from, and the fuel cavity on the other side of the middle plate. Three hose connections can be seen on the tap. A problem often found when racing an NC30 or NC35 is fuel starvation. This model saw the introduction of the 360° crank firing engine, which is also known as the «big bang» engine. The Honda VFR400R NC30 is widely regarded as being a fine handling motorcycle. This is a result of the vacuum valve of the fuel tap not allowing enough fuel to flow to the carburetors.
The engine has a very wide powerband for a 400cc engine, which made it a perfect beginners-superbike. It has a hardcore fanbase, especially in Japan and the UK, where the NC30 is a popular track-day and racing bike. You no longer need a vacuum line from the engine to the fuel tap. These pieces are no longer needed unless you want to convert back to a vacuum fuel tap. Bypassing the vacuum operation of the fuel tap requires removing the spring, modifying the rubber diaphragm and putting it back together such that it doesn’t leak. During re-assembly, make sure the small diaphragm outer edge seats into the groove of the middle plate. If the diaphragm is pinched in the wrong way, leaks will occur.
See the pictures below and duplicate what is shown. It is possible to insert the foot of the diaphragm into the plastic piece through the metal plate in a single step. The NC30 was also officially sold in limited numbers in several European countries. Some models also had power restrictions, this was most commonly a restriction washer in each of the rubber sections between the carbs and cylinder inlet. The procedure is very simple, but often hard to understand until someone shows you exactly how to do it. The large rubber diaphragm (shown underneath the plastic disc) seals the vacuum cavity from the bleeder hole, which prevents vacuum from leaking to the outside air. The outside metal plate goes on the plastic piece side of the middle plate. The spring normally presses on the plastic disc (shown), which presses the small rubber diaphragm (not shown) against the center hole of the fuel valve, preventing fuel from flowing to the outer ring of the valve and out the fuel output tube. The clutch was hydraulically actuated and the front forks featured Hondas TRAC (Torque Reactive Anti-dive Circuit) system.
The NC30 and NC35 HRC manuals recommend a change to the fuel tap that removes the vacuum valve to allow higher fuel flow. Outside Japan, the VFR400R (NC30) was officially imported to the United Kingdom for four years, but with a price tag of £5899 (similar to that of the 1000 cc bikes of the time and actually more than Honda’s own VFR750F), failed to sell well. Remove the plastic part that is attached to the large rubber diaphragm. Thats the purpose of this web page. An NC30 fuel tap is shown to the right (removed from the fuel tank). The NC35 fuel tap is basically the same, and this procedure works for both types. The official UK bikes were only ever available in two colour schemes. Remove the rubber diaphragm assembly from the middle plate by pushing the smaller diaphragm through the center of the plate. Be careful not to damage the diaphragms. Even if you can read Japanese, the text doesn’t really explain it very well.