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Henniebrandweer
Familiar Member
South Africa
215 Posts |
 Posted - 07/09/2007 : 05:47:30
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quote:
Originally posted by Cammo
Once you've adjusted the floats, your carbs should be in the best condition they've been for ages.
so should i set the float levels to 6.8? no need to use special specifications with these mods done???
Thanx Cammo, |
I put Wet stuff on the Red stuff!!! |
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Cammo
Forum Veteran
Australia
3023 Posts |
Posted - 07/09/2007 : 05:48:39
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| Nope, always the same level. |
I DUG the underground! |
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Henniebrandweer
Familiar Member
South Africa
215 Posts |
Posted - 07/09/2007 : 05:51:21
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| Thanx Cammo, last question for today, did Aleev4 mean air screw or pilot jets?? what do u think? |
I put Wet stuff on the Red stuff!!! |
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Cammo
Forum Veteran
Australia
3023 Posts |
Posted - 07/09/2007 : 06:09:29
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He meant pilot screws, which you've already done.
He should read the entire post more often!  |
I DUG the underground! |
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Henniebrandweer
Familiar Member
South Africa
215 Posts |
Posted - 07/09/2007 : 06:11:31
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| Thanx guys, will let u know what happens today, im off home now, enjoy ure day, |
I put Wet stuff on the Red stuff!!! |
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nakes
Regular Member
South Africa
563 Posts |
Posted - 07/09/2007 : 10:39:32
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quote:
Originally posted by Henniebrandweer
quote:
Originally posted by nakes
Ja, drill those holes bigger with a 2.5mm bit turned by hand... don't use a machine.
why do u say not with a machine Nakes?
Only read this now.. I said not with a machine because you want the hole to be no bigger than 2.5mm and if your bit isn't in the machine chuck absolutely straight your hole will be bigger than 2.5mm... or if your chuck is not 100% straight (some have a slight wobble) then it'll also affect the size of the hole.. I just found that turning the bit through by hand was a safer way to do it..
Not sure if the NC30 slides are made of the same material as the NC35.. it was easy enough to turn the bit through by hand... |
http://www.hondarvf.com - A community driven workshop guide... |
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Henniebrandweer
Familiar Member
South Africa
215 Posts |
Posted - 07/09/2007 : 21:19:08
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ok guys,
So i did all the fun stuff, i took all apart again, drilled the slides, balanced again, replaced the waterpump seal, and cleaned a bit here and there, here's a couple of pics:
Before:
After:
Now, no oil leaks, no funny idling, no missing on high speeds, Revs great!!
BUT!!!.... dont know why, but it seems she pulls great up to 9000rpm, then from there to about 13000-14000rpm, pulls really not so great, then after that she pulls again??
what could that be? |
I put Wet stuff on the Red stuff!!! |
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Cammo
Forum Veteran
Australia
3023 Posts |
Posted - 07/09/2007 : 22:49:56
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It's running lean for your foam filter hennie!!
If you put a standard filter in it will cure it. |
I DUG the underground! |
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nakes
Regular Member
South Africa
563 Posts |
Posted - 07/09/2007 : 22:59:51
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| Well done Hennie... nice work.. You've been busy hey... |
http://www.hondarvf.com - A community driven workshop guide... |
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JonRA23
Familiar Member
Australia
382 Posts |
Posted - 07/09/2007 : 23:25:11
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Good stuff Hennie.
Below is a pic of which carburetor componenets effect fueling at different slide openings, with a vacuum slide carburetor as on the VFRs this is more relative to engine revs than how far you have the thottle twisted open, you can be at wide open throttle on the butterflies but the slide will only open up as far as the engine requires.
The different componenets all overlap but the taller the greyed out section the greater the effect.
From your description and the chart would be tempted to say needle taper.
An O2 senesor run on a dyno will help you sort it further now that you have it running decent.
Rick Oliver does replica HRC Needles with different taper if you are looking for some.
regards
jon
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Mockery
Settled In Member
Australia
102 Posts |
Posted - 08/09/2007 : 02:30:49
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Cammo, i'm noticing you seem pretty down on using the foam filter mod.
Is it actually a bad thing, or just that it's not being catered for in Hennie's re-jetting? (as jon said, it's probably not jets which would fix that issue)
But if you were to do it and then get a dyno-tune w/needles etc, it would all be sweet, right? |
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Cammo
Forum Veteran
Australia
3023 Posts |
Posted - 08/09/2007 : 03:22:16
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I'm not against it, it just makes tuning the bike harder, for no extra gains really.
The jets Hennie's using aren't big enough for the foam filter, you would need what Rick suggested, or even slightly bigger, depending on what sort of foam is used. In my mind it's easier to just use the standard filter, for which jet sizes are well known (it will also filter far better if that's any concern to you).
When using a free flowing foam filter (such as HRC foam), even when the main jet size is correct (which let's face it, is fairly easy to get right), there will still be a slight hesitation of the fuelling between the transition from the jet needle to the main jet (this is around 10-11k rpm).
This can't be gotten around by using standard needles. Edit: Jon is correct in his diagram that the needle taper is to blame for this hesitation/stutter during the transition, hence you'll never fix this by using standard parts.
So you could buy new needles/jet kit, try and get it right, or just put a standard filter back in for virtually the same result, it's a no-brainer to me.
After this carb work, the bike will go like a good 'un if hennie puts a standard filter in. This is the setup that the majority of owners on here perform when the bike is rejetted (tried and proven), it just makes more sense to steer clear of introducing unknowns.
The vfr/rvf's require drastic jetting changes when the induction system is changed (even minor changes!), as has happened here.
Jetting, raising the needles, and drilling the slides gives good gains for just 1 or 2 hours work.
I only know this because I've hacked at airboxes, used different filters etc in the past, and come to the conclusion that Honda got it spot on, and that the vfr is stubborn beast in its air requirements!! |
I DUG the underground! |
Edited by - Cammo on 08/09/2007 03:30:43 |
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Henniebrandweer
Familiar Member
South Africa
215 Posts |
Posted - 08/09/2007 : 12:37:31
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| Damm, ill just have 2 wait till the end of the month, to get a standard filter then! lol, but i willdefinately let u guys know what happens, thanx cammo.. oh and cammo, do u think putting in even bigger jets would make a difference? coz by the sound of this, the foam lets thru too much air?? |
I put Wet stuff on the Red stuff!!! |
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Mockery
Settled In Member
Australia
102 Posts |
Posted - 08/09/2007 : 15:55:14
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Fair enough cammo, thanks for the info.
I just understood that the filter mod wasn't necessarily for performance, but for re-usability. I know that Honda airboxes & filters are damn well tuned to start with, so I guess I'll just suck it up and pay the price for single-use paper elements.
Cheers! |
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Henniebrandweer
Familiar Member
South Africa
215 Posts |
Posted - 09/09/2007 : 19:07:32
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Geewiss guys, is it normal to only get 150km on a tank of fuel? well not a full tank but when I reached 150km the bike started jurking and I had to put it over to reserve? I'm sure it was allot lighter be4? Cammo? what do u think? please let me know? even if one rides hard could this be normal?
thanx |
I put Wet stuff on the Red stuff!!! |
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Henniebrandweer
Familiar Member
South Africa
215 Posts |
Posted - 12/09/2007 : 10:55:54
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A Couple of Photos of the Final Product
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I put Wet stuff on the Red stuff!!! |
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Monkey
Regular Member
United Kingdom
855 Posts |
Posted - 12/09/2007 : 13:48:22
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| lovely!! |
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CMSMJ1
Forum Veteran
United Kingdom
3623 Posts |
Posted - 12/09/2007 : 14:08:04
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that looks wicked man..well done!
on the foam front - I agree with Cammo, I had HRC foam wit no airbox lid and race pipes etc with 135 jets - was good up top but nasty in the midrange. now using std filter and no airbox lid and all is good in the 'hood. was also paranoid of all the small animals being eaten by the motor... |
89 NC30 my mate Number 9
IMPERATOR REX ANGLORUM |
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Henniebrandweer
Familiar Member
South Africa
215 Posts |
Posted - 12/09/2007 : 17:55:36
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| Why u not using the airbox lid? does it give a bit more performance? and why 135 jets? not heavy on fuel? |
I put Wet stuff on the Red stuff!!! |
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Topic |
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NC30 MISSING AND LOSING SPEED? Not anymore!!!!!
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