Shimming same with Jetkit Needles?

vmax · July 31st, 2013, 08:13 PM

Hi all,

I just want to know is Shimming needles same with replace jetkit needles, cause from what I read both action to raise a needles.
I want to make sure this cause I want to buy FP for my 2012 ninja. And how about gas mile?.
For your info my bike running stock with slip on muffler, bike running great, smooth when I rev from low, but seems very light when I twist or roll on throtle from bottom. There is why I want to buy FP jetkit or shimming to make power on low end.

subxero · August 1st, 2013, 05:46 AM

Shimming with washers and adjusting the clip on the FP needles is basically the same thing. The FP needles will give you a little more range of adjustment as well as slightly finer adjustment. Plus you get the FP needle which has a different taper to it which makes getting the jetting right a little easier IMO.

not sure what you mean by "light" if you bike is rich it will bog down

vmax · August 1st, 2013, 08:16 AM

Quote:

Originally Posted by subxero

Shimming with washers and adjusting the clip on the FP needles is basically the same thing. The FP needles will give you a little more range of adjustment as well as slightly finer adjustment. Plus you get the FP needle which has a different taper to it which makes getting the jetting right a little easier IMO.

not sure what you mean by "light" if you bike is rich it will bog down

HiSubxero,

Thanks for your info, but how about mpg?. light mean when you roll on thortle not heavy.

DaBlue1 · August 1st, 2013, 08:22 AM

Raising the needle height mainly affects 1/4-3/4 throttle range (starts about 3k as the slides start to rise). Gas mileage decrease is tiny in this range. However keep in mind any time you add more fuel into combustion or twist the throttle more, MPG drops off.

http://www.motorcyclecarbs.com/carbs101.pdf

vmax · August 1st, 2013, 11:49 PM

Quote:

Originally Posted by DaBlue1

Raising the needle height mainly affects 1/4-3/4 throttle range (starts about 3k as the slides start to rise). Gas mileage decrease is tiny in this range. However keep in mind any time you add more fuel into combustion or twist the throttle more, MPG drops off.

http://www.motorcyclecarbs.com/carbs101.pdf

Thanks DaBlue, so I will try to raise my needles to see improvement

July 31st, 2013, 08:13 PM	#1
vmax ninjette.org member Name: max Location: bali Join Date: Nov 2012 Motorcycle(s): ninja 250 Posts: 60	Shimming same with Jetkit Needles? Hi all, I just want to know is Shimming needles same with replace jetkit needles, cause from what I read both action to raise a needles. I want to make sure this cause I want to buy FP for my 2012 ninja. And how about gas mile?. For your info my bike running stock with slip on muffler, bike running great, smooth when I rev from low, but seems very light when I twist or roll on throtle from bottom. There is why I want to buy FP jetkit or shimming to make power on low end.

August 1st, 2013, 05:46 AM	#2
subxero dirty boy Name: Joe Location: Johnstown, PA Join Date: Sep 2012 Motorcycle(s): I don't even know anymore?? Posts: A lot. MOTM - Apr '14	Shimming with washers and adjusting the clip on the FP needles is basically the same thing. The FP needles will give you a little more range of adjustment as well as slightly finer adjustment. Plus you get the FP needle which has a different taper to it which makes getting the jetting right a little easier IMO. not sure what you mean by "light" if you bike is rich it will bog down __________________________________________________ I love the smell of burning pre-mix in the morning I don't think I'm a lot dumber than you thought that I think that I thought I was once.

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August 1st, 2013, 08:22 AM	#4
DaBlue1 Long Time Rider Name: Blue Location: Charlotte, NC Join Date: Sep 2010 Motorcycle(s): 2009 Kawasaki Ninja 250R Posts: A lot.	Raising the needle height mainly affects 1/4-3/4 throttle range (starts about 3k as the slides start to rise). Gas mileage decrease is tiny in this range. However keep in mind any time you add more fuel into combustion or twist the throttle more, MPG drops off. http://www.motorcyclecarbs.com/carbs101.pdf