Question about 1996 Honda RVF 400 NC35
RVF 400 NC35, cough's and splutters 5000-7000rpm i have recently purchased a nc35 first registered in 2001, done less than 5000km goes really well but the last couple of weeks bike seems to be choking between 5000-7000rpm then runs fine from there on, it first started when it was cold but now does it all the time.the bike was serviced when I bought it a month ago from a dealer (importer) and has no noises and is really smooth, the engine has plenty of retardation when throttling off and seems fine apart from this problem. If you slowly throttle through the rev range its fine but if you open the throttle than the problem occurs. any help would be great as I live in a small country town and the nearest service center is 450km's away. I would take it to the dealer but they are in Melbourne which is around 2000km from where I am and hoping that it might be something simple otherwise it will take about a month to get it there and back as its still under warranty. @
Hi, Waynecollins and the usual suspects are:
1. Severely discharged or a damaged battery should have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a cursory reading of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries fail in this scenario more so than lead-acid batteries.
2. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
3. Spark plugs in bad condition or partially fouled.
4. Spark plug cables in bad condition and leaking check for spark leakage in the dark
5. Spark plug gap too close or too wide.
6. Faulty ignition coil, module, and or sensor.
7. Loose, dirty, or corroded ignition module connector at crankcase.
8. Faulty CKP or CMP, MAP, ETS, ATS, TPS, O2 sensor.
9. Dirty air filter.
10. Intake air leak.
11. Water, dirt, or rust in the fuel system.
12. Carburetor contaminated, sticky float, plugged jets.
13. Carburetor has oil in the bowl due to excessive oil in pre-mix.
14. Carburetor vacuum diaphragm torn, cracked, not seated or installed improperly.
15. Multiple carburetors out of sync.
16. Fuel filter clogged.
17. Old or contaminated fuel.
18. Fuel tank vent system plugged or carb vent line closed off.
19. Gas cap diaphragm valve faulty.
20. Vacuum line from intake manifold to fuel valve is broken, cracked, pinched, or missing.
21. Carburetor controls misadjusted.
22. Incorrect valve timing.
23. Valve springs floating, weak, or broken.
24. Damaged intake or exhaust valve.
25. Incompatible performance parts.
26. Control module may be in "LIMP" mode
27. Check for engine trouble codes.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
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Honda VFR400R Service Manual
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Posted on Jan 02, 2017
My 'wing won't run unless it has been warmed up some. I would suggest that you r&r your carbs to make sure the jets in the bottom are working correctly. They tend to get plugged up, especially after sitting & the aluminum flaking off inside... Rick
Posted on Apr 14, 2009
Either take the carbs off and clean them or add some fuel additive to clean the system. Sounds like you have a clogged jet.
Posted on Aug 14, 2009
Testimonial: "will try this later"
check fuel level, u may need to check the flow of petrol to it,,Also if that does not solve you may need to service the carb and check fuel filter,air filter etc...
Posted on Aug 31, 2009
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