Why use NC30 carbs in a 35 race bike?
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- skinnydog0_0
- NWAA Supporter
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- Joined: Tue Apr 20, 2010 9:07 pm
- Bike owned: Penny Farthing
- Location: Pembrokeshire West Wales
Re: Why use NC30 carbs in a 35 race bike?
Cheers Drunkn Munky, good to know i am almost rightDrunkn Munky wrote:For what its worth your current jetting sounds about right for your spec, the previous 35 i had had ported and gasflowed heads, run 120 ish jets, standard airbox, no snorkle or rubber flap with a token guesture piece of foam to stop the bumble bees being swallowed up and a yammoto system. Went really well if a little boggy down low.

I did try to run the bike without the flap and snorkle, but it was suffering from turbulance when it was running hard, so put the flap back. i might try it without the lid tomorrow and just the free flow filter see if that leans it off enough, or too much.

- Drunkn Munky
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- Bike owned: NC30 MC21 TZR FZR GSXR RG MITO
- Location: Kent
Re: Why use NC30 carbs in a 35 race bike?
Yeah this rubber flap business is a strange one, as everyone knows removing it causes no end of problems but mine seemed to run fine.
Saying that tho not long before i sold the bike i replaced the shoddy looking foam filter with some dual density foam, after doing this i did notice the occasional lumpy running but it wasnt enough to bother me. The guy that had the bike off me went further and fitted a K&N and had it jetted down a little, this really buggered up things and the bike suffered the classic turbalance problems of having no rubber flap. The owner has since fitted a rubber flap and snorkle and now runs like a dream.
Thinking about it i think the bike now runs 120 ish jets and was running larger jets when i had the bike with the no snorkle/rubber flap setup, it was a while ago now
If your going for the no airbox at all setup i know CMSJ1 (Mark), runs no airbox, a HRC carb tray and RVF carbs with short stacks, 135 jets, foam filter duct taped on and it runs perfect.
Saying that tho not long before i sold the bike i replaced the shoddy looking foam filter with some dual density foam, after doing this i did notice the occasional lumpy running but it wasnt enough to bother me. The guy that had the bike off me went further and fitted a K&N and had it jetted down a little, this really buggered up things and the bike suffered the classic turbalance problems of having no rubber flap. The owner has since fitted a rubber flap and snorkle and now runs like a dream.
Thinking about it i think the bike now runs 120 ish jets and was running larger jets when i had the bike with the no snorkle/rubber flap setup, it was a while ago now

If your going for the no airbox at all setup i know CMSJ1 (Mark), runs no airbox, a HRC carb tray and RVF carbs with short stacks, 135 jets, foam filter duct taped on and it runs perfect.
- skinnydog0_0
- NWAA Supporter
- Posts: 1213
- Joined: Tue Apr 20, 2010 9:07 pm
- Bike owned: Penny Farthing
- Location: Pembrokeshire West Wales
Re: Why use NC30 carbs in a 35 race bike?
Cheers Drunkn Munky, i will see if Mark has any advice when i get the vfr carbs built and on the bike. i feel that it's going to be a hole bag of trouble at first
Still it will be worth it in the end i am sure

Still it will be worth it in the end i am sure

- Drunkn Munky
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- Posts: 6313
- Joined: Thu May 01, 2008 9:37 am
- Bike owned: NC30 MC21 TZR FZR GSXR RG MITO
- Location: Kent
Re: Why use NC30 carbs in a 35 race bike?
oh yes, bloody big can of worms these NC carbies, good luck with it