help wanted: nc24 vfr400r

**VF AAR** · 19th September 2007, 09:41

Originally Posted by HenryDorsetCase

I think i had a similar problem with mine recently (not enough vacuum to open the fuel tap, no fuel = no run). then when I fixed that I flooded the thing senseless... I did the HRC fuel tap mod to mine.... you have to be careful after doing the mod that the only diaphram left in the tap doesnt leak but other than that it takes about five minutes. dont forget to crimp or blank off the now un needed vacuum line...

i only had one pipe comming off the gas tank and thats the main one. it looks like there is ment to be more but there isnt.

i did that hrc fuel tap mod, its a good idea and makes sense but doesn't solve me problem

is there some sort of secret way the carbs come off or?
cos ive been yanking at mine for ages and it wont budge and ive undone everything that even looks remotely connected with the carb.

**Ocean1** · 19th September 2007, 10:21

Can't help with the carb thing dude. But did you get new plugs?
Just because you can see a spark when it's out of the cylinder it doesn't mean it's good enough to work properly under pressure.

**Paul in NZ** · 19th September 2007, 10:42

Originally Posted by VF AAR

is there some sort of secret way the carbs come off or?.

Are they in the middle of the V? If so they could be joined on a pivot type arrangement that needs loosening off. Down load a manual if you can.

Originally Posted by VF AAR

cos ive been yanking at mine for ages and it wont budge .

Yikes - that must be frustrating...

**mogiman** · 21st September 2007, 16:48

how it going still having trouble ????

**kiwi cowboy** · 21st September 2007, 21:58

The spark its generating wot colour is it.
I ask because i once tryed to help my boss get his v4 500 racecar going [pushed-towed thing for ages when we tested the plugs for spark against the engine there was plenty but we found out aftre taking it to a shop the spark was the wrong colour the spark was blue i think but neede to be orange to fire up new plugs and thing fired up fine hope this helps.
PS this wasnt on tardme was it

**kiwi cowboy** · 21st September 2007, 22:07

Originally Posted by mogiman

Diaphram is important it stops the fuel just flowing other wise it just runs straight through ya carbs to the top of the cyclinder runs past your rings and into your oil they are pretty cheap if i rem correct and the vac is important too made that mistake runs like crap otherwise
my ph# is 0211830405 if ya really stuck got no credit at mo so cant replt to text or text

i have had the tank off my nc21 ive just got and the diaphram in mine is in so it gravity feeds strait to the carbs is this sposed to be in towards the tap and the carbs suck it past? i wondered bout this when i had it apart but didnt want to screw round with it.i do no it floods easly starting it will this be the problem cheers and sorry to highjack the threed

**VF AAR** · 9th October 2007, 08:18

Took the bike to Mt. Eden motorcycles on crner of boston and mt.eden rd
It was beyond me
$200 later the diagnostic
FLOAT NEEDLE VALVES need replacing and adjustig
i thought $200 for that was STEEP
they didn't even fix it, they only told me what was wrong and said they didn't wanna fix it.
So droppd carbs off to red baron(big ups to these guys)
they said no problem.
hopefully picking them up sometime this week.

Lame thing is they told me even when they replace the valves and adjust them to hondas specs the bike still might not go if the needles holes have wear. and ill have to source some 2nd hand vfr400 carbs.

so lets just hope i havn't wasted close to $500 getting these shitty carbs going haha.