@ GCD - not heard of anyone getting any results with a factory pro kit..

IMO they are not required. Get it dyno'd and see what is what. The go from there.

Are you racing it?

CMSMJ1 wrote:@ GCD - not heard of anyone getting any results with a factory pro kit..

IMO they are not required. Get it dyno'd and see what is what. The go from there.

Are you racing it?

Not racing, a few track days and weekend road rides. No speed restrictions here in Thailand, so we tend to go pretty quick. Do you suggest putting it back to standard?

400_Rider wrote:Well the reason I am changing the needles and main jet is because there is clearly something wrong with the bike as it tops out at 109mph

And this is a cause for concern? Just remember NSL is 70mph and anything over 100mph is an instant license loser Don't worry about top speed, at least you have more chance to enjoy the scenery

400_Rider wrote: there is a huge flat spot in the mid range and the power seams hesitant.

Easily solved by fitting the extra washers mentioned previously

GCD wrote:I have just put a factory pro jet kit in mt NC30. It is not running right yet, to rich I think according to the info on the Factory Pro website. Woundering if I shrould have stayed with the stock set up.

Has anyone used the Factory Pro Kit? What jet size and needle settings did you use? Did they improve performance?

I think you should have probably started your own thread.

Here is my 2c worth.

They can improve performance but don't expect to buy something off the shelf and fit it in and it work 100% straight away, a generic kit is never going to be optimised for your bike.

Jetting varies a lot on these bikes depending on air-filter, exhaust system and general state of tune of the engine.

The standard kit you brought was designed to work with a specific configuration of bike (does it say stock or modded?) i.e. the zxr dynojet kit is designed to be used in conjuction with the micron exhaust system.

You'll still need some dyno time with the bike, if anything just to check it is running ok, you don't want it running mega lean anywhere, this can be really bad for the engine (not so likely though if you have put bigger jets in)

Take a few configurations from here, work out where you approximate jetting should be and then take it to the dyno and go from there.. should be able to get a pretty sweet setup.

Most configurations of NC30 have been well documented here, normal jets are cheap 2 / 3 pounds each. Unless your kit comes with adjustable needles / different throttle slide springs etc (which aren't really necessary on and NC30 anyway) I'd just goto the dyno and get it setup there...

As for your 'should I leave i standard' have you not noticed an improvement? Sureley if it runs better you should leave it like that...?