VFR 400 Fuel pump

[bruce_lee_22]

hey does anyone know where i can get a vfr 400 nc30 89 model fuel pump? i think mine's gone, bike wont start up properly at all anymore
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VFR 400 & RVF 400

[st3v3]

Tried Ebay?
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Roger wrote: Women don't get damp for clingy puppies. Get some better happy pills, hit the gym & buy a medallion the size of a dinner plate. Job done

[MaybeGuy]

they dont have one.
its a diaphragm valve. check your vacuum hose isnt perished.
if your thick, its the one that goes from your fuel tank into the cylinder block.

i was sold a non runner nc30 for £400. the vacuum hose had popped off. then fired straight up.
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[bruce_lee_22]

[st3v3]

Checked carbs?
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Roger wrote: Women don't get damp for clingy puppies. Get some better happy pills, hit the gym & buy a medallion the size of a dinner plate. Job done

[MaybeGuy]

You cant find one because they dont exist.
Sounds like the symptoms of a vacuum hose to me. Have you even checked?
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[Frost]

They definatly don't have one. The fuel is in the tank above the engine and gravity sends it to the carb to be mixed. Sounds like you might have old stale fuel in your tank, if the fuel is old, changing it will fix the problem.

If the fuel is fresh then your problems mixture related and might be a problem with the choke/throttle stops/idle speed. These can be fiddled with by getting the tank off. If these are all fine a blocked jet would be the next most likely cause and will require you to remove and dismantle the carbs. dismatling and checking is simple, but getting the carbs back on the V4 engine layout is tricky.

[st3v3]

They are bloody tricky, a mate of mine had one and took them off, took us all day to get them back because they sit unevenly, so when you get the back two fitted, then the front two the back one's move out of position and you go on like this for hours.

Get's most frustrating after half an hour, we were at it for a few...
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Roger wrote: Women don't get damp for clingy puppies. Get some better happy pills, hit the gym & buy a medallion the size of a dinner plate. Job done

[Theoutsider]

I`ve got a nc30.I have a VFR 400 nc30 and it doesn`t have a fuel pump,check the hoses like everybody on here said,if not try new plugs,they can die so easy.

[bruce_lee_22]

cheers guys, already took carbs off now, gonna clean them incase, and my jet's also gonna change the vacuum hose, so basically do everything you all suggested, but my bro thinks its my vacuum hose thanks
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VFR 400 & RVF 400

[bruce_lee_22]

[Frost]

Trick to getting the carbs back on:
Push the carbs into the front rubbers about a centimeter.
Let the carbs rest on the rubbers at the back.
With the aid of a flat screwdriver lever the rear rubbers over the top of the back of the carbs.
Push down firmly and it will all go together.

Essentially your just shoving the carbs down into the rubbers, but making sure that the tops of the rubbers don't get pushed down.

[MaybeGuy]

As above.
Its a 5 minute job to get them back on using that method.
Lol @ everyone else who spent ages doing it.
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[bruce_lee_22]

[serlant]

could be something as simple as the spark plug leads not on the right cylinders? double check them?

[Frost]

If it's backfiring its getting more fuel than it is air and spark. Might be worn out spark plugs or a semi flat battery. Might be a blocked air filter or incorrect mixture settings.

[bruce_lee_22]

[bruce_lee_22]

yo guys managed to get it working, changed spark plugs etc runs fine, also thanks to cleaning my carbs and jets, it doesnt struggle to start up anymore its great thanks a lot for your help much appreciated
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VFR 400 & RVF 400

[Frost]

We expect pictures of wheelies and burnouts by the end of the day.

[bruce_lee_22]

[Theoutsider]

It`s always the plugs

[bruce_lee_22]

yeah thanks for your help

got another small problem as i was putting bike back together noticed my throttle cable was twisted, and looks buggered, and i test rode it, in 1st and 2nd gear its fine can get to 16k revs but in all the other gears it wont go over 8000 rpm and i havent a clue what wrong any ideas?
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VFR 400 & RVF 400

[Frost]

Sounds underpowered, probably fuel related. They naturally have a bit of a flat spot in power delivery around 6k but this gets much worse if the fueling is wrong. Try getting it to 13k in 2nd then changing to 3rd so the revs will be at about 9k and see if it pulls the gear then. If it doesn't you have big fueling problems. If it pulls it you just have a flat spot. Sticking some m3 washers under the needles helps to remove it if its duel to a sports exhaust.

[bruce_lee_22]

[Frost]

If the carbs arn't sealed onto the rubbers properly you can get some running problems. As you've had them off and their a bastard to get back on, they are probably the first thing to check.