I see, i would have though doing a scaled profile of one side of the needle would be enough, we can always double the values with a calculator, saves you work ?

Old Painless wrote: we can always double the values with a calculator, saves you work ?

If you have the values.........

You can make a scaled profile of the graph easily. Just make the scale of the axis 1:2 (y:x).

I don't see the point personally, it's more useful in the current scale to see differences between the needles (scaled profile would make differences very hard to see).

To dig up an old thread, does anyone have any of the 8ZG or 8ZH or 8ZJ or 8ZK NC30 needles that they could measure and post up on a graph like has been done with the 8ZF needles

Yakama wrote:To dig up an old thread, does anyone have any of the 8ZG or 8ZH or 8ZJ or 8ZK NC30 needles that they could measure and post up on a graph like has been done with the 8ZF needles

and rick oliver road needles :D

in the middle of trying to sort my mis firing in the midrange after suspecting my needled were worn, have tried alex withams and still no difference

so measurements would be great :D

Bump.

CRM wrote:lol i am gonna keep a beady on this. i have some needles i dont mind sharing
i will go have a rummage see what i have

As do I Paul, if you want I'll send them all to you and you can use the same method to measure and catalogue all the info.

Off the top of my head I've;
Nc30
FI international x2
Factory pro needles
Stock J51A/B's
8ZF
8ZG
8ZC

Plus I have
Cbr400r nc29
J80B

I have the 8ZH, J and K needles from the F3 kit if anyone wants measurements.

superlite wrote:

Correct me if I am being dense... if you shimmed the standard nc30 needle up by 1mm (there's a 0.5mm shim as standard and it's mostly accepted as A Good Idea to add another one) then wouldn't the profiles and overall lengths be actually very similar? Perhaps you could plot a new graph to show this idea?

amorti wrote:f you shimmed the standard nc30 needle up by 1mm then wouldn't the profiles and overall lengths be actually very similar?

Sort of, but the needle profiles are very slightly different which has a big impact on fuelling.