nc30 performance& handling???

Post by **ChowderV4** » Tue Apr 05, 2011 3:48 pm

aww but that ruins all the fun....then where's your sense of achievement

The Dark Prince · Post by **The Dark Prince** » Tue Apr 05, 2011 3:57 pm

Hi
Having spent many hours over winter in the garage working on my track bike after last weeks balst at Oulton the three stand out mods that really made a difference are:
Gearing 14/43.. the acceleration is as good as my 749
Tyres, Diablos are awesome even in the wet
and something not to everyones taste bit fitted a quick action throttle - might be a bit twitchy for some on the road but on the track it's essential.

phil x · Post by **phil x** » Tue Apr 05, 2011 4:51 pm

Cheers for the replies all.
After buying the bike, I certainly ain't got money to burn.....
I certainly don't have 1/2 day spare at the mo, if I get chance, I may have a go sooner.

Cheers, Phil

phil x · Post by **phil x** » Wed Apr 06, 2011 10:15 pm

Has anyone posted dyno results from before and after carb mods (showing fuelling ratio) on an otherwise stock bike. Had a quick search but couldn't find anything.

Had another run out today, definately a bit lame up to 6k (from about 4 1/2), worse when it's hot which, as mentioned, indicates lean. Also bike starts & runs wonderfully when cold but is a little more reluctant when warm (after being hot & stood a while) - a bit rich on the pilots???

Phil

alexwitham · Post by **alexwitham** » Wed Apr 06, 2011 10:20 pm

Have a read of this:

viewtopic.php?f=24&t=11503

phil x · Post by **phil x** » Wed Apr 06, 2011 11:14 pm

Nice bike (in the best colours too

)

Do you have a dyno run with the stock jets?

I must admit, it looks to be running quite rich with the 120 jets & the aftermarket exhaust.

Phil

alexwitham · Post by **alexwitham** » Wed Apr 06, 2011 11:17 pm

Unfortunately I don't have graphs with stock jets. Sorry.
Do you mean mine looks like it's running rich?

phil x · Post by **phil x** » Wed Apr 06, 2011 11:23 pm

alexwitham wrote:Unfortunately I don't have graphs with stock jets. Sorry.
Do you mean mine looks like it's running rich?

Yeah, fuel curve is spending a lot of time below 13:1 which means a bike that stinks to follow & wastes fuel, I bet your exhaust is sooty too!
Best to keep between 13 & 14.5:1 - to the lower end of this for power & upper end of this for economy.

Phil

alexwitham · Post by **alexwitham** » Wed Apr 06, 2011 11:28 pm

I'm now running modified induction on the same carb setting and it runs great. It used to pop and fart a touch before I done some fettling with the airbox/filter/snorkel etc.
It pulls very strong now.

phil x · Post by **phil x** » Mon Apr 25, 2011 11:14 pm

UPDATE;
I had the carbs off, all stock (110) mains & 35 pilots allround, stock needles & a single .5mm washer under each. Pilot screws were between 2.1 & 2.6 turns out (two were 2.5/2.6 turns out). Emulsion tubes 2 were correct, 2 had been fitted in the wrong carbs......
Float heights - all were .5 to 1mm too high (smaller measurement).

With carbs set to correct stock standard, except the 115/117.5 mains from RO, the bike feels good - stronger at 9k+ not as boggy at 5-7 k rpm but still feels a bit feeble - again, more so when warm.

I'll leave it a while, might try & get to the dyno day on 16/7

Phil

nc30 performance& handling???

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