to jet or not to jet...that is the questi.....

eddiekay · February 16th, 2011, 07:42 AM

Jetting gets a lot of attention on this forum.
So...I have to wonder if I should give it a try.
Really...I spend most of my time @ 75-80 on highways getting to the 30 minutes worth of twisties i can find.
Does my bike run rich or lean ?
I dunno and i dont care because it does exactly what I want it to do all the time...but am I missing better performance simply because I'm used to what it does. I came down to a 250 not expecting much and I've been amazed at how much these bikes can do. Pipes, removed snorkels, jetting...I mean...as a fully noob mechanic these things all sound like fun but...what will I get for my trouble ?
So far..I've washered the forks ( thanks KKIM) love it.
Swapped the sprockets ( thanks to a bunch of guys) I love it
so...both ninjette.org mods have been excellent and now I'm thinking about trying what everybody else seems to be doing...so what might I expect..again, given that I'm 101% happy with how she performs.
What do you think ?

almost40 · February 16th, 2011, 08:27 AM

If it aint broke, dont fix it. ENJOY

V2Neal · February 16th, 2011, 08:50 AM

Unless you've added a pipe or something else, I wouldn't bother with it.
Spend more time riding.

kkim · February 16th, 2011, 11:00 AM

Quote:

Originally Posted by eddiekay

I'm 101% happy with how she performs.
What do you think ?

I think you should get out and ride it more... leave bike as is until you find something that needs attention.

HKr1 · February 16th, 2011, 11:34 AM

Jetting makes the bike feel and ride better, thats stock pipe or aftermarket. But, its a little harder than putting a rear caliper on

eddiekay · February 16th, 2011, 10:03 PM

Naw...like i said...this bike does everything I ask but still, with all the chatter goin' on here about jetting...I was wondering if I might be missing something. Thanks for the opinions.... besides, I'm planning a major mod sometime the spring...I'm gonna clean AND wax it !

Jinx250 · February 18th, 2011, 09:21 AM

A loooot of people think the bikes need to be rejetted right out of the box. In actuality, all that needs to be done IMO is to adjust the idle mixture screws. Once those are set properly, you should be good to go if you haven't modified the intake or exhaust.

setasai · February 18th, 2011, 11:51 AM

Sounds like you love the way it rides as is. If that's the case, leave it be and ride more. Rejetting for no reason wont make it "more" fun to ride if riding is what you want to do. I only did small mods while stuck in the house because of rain season but I've planned it nicely so that when the rain stops, the bike is still ready to go. Btw, wash and wax! super pretty.

kamikaze · February 18th, 2011, 10:04 PM

my only complaint is the hard starting. if shimming needles or a re-jet will fix this, then I think that's what I'm going to do.

kkim · February 18th, 2011, 10:07 PM

shimming will help the hard starting... so will adjusting the mixture screws, but that's a lot more work than shimming.

peachdiddy · February 19th, 2011, 08:41 PM

I honestly do NOT want to work on my Ninj. Would a dealer be willing to shim the needles and adjust the mixture screws? I'd just hate to wreck my first motorcycle

setasai · February 19th, 2011, 11:18 PM

Quote:

Originally Posted by peachdiddy

I honestly do NOT want to work on my Ninj. Would a dealer be willing to shim the needles and adjust the mixture screws? I'd just hate to wreck my first motorcycle

If you follow the DIY closely, there is a very small chance you'll mess it up. Shimming was the first thing i did and I had under 200miles on my ninja when I did it. Thanks to the DIY, it was the easy. Do take it slow and keep everything together. I'm not sure dealers know about shimming. They can most likely rejet for you but it'll cost quite a bit.

Working on your bike is one of the best things about owning one IMHO. Mainly because it's like working on your own car but simpler. Everything is easier to get to and there are so many people here to help. Think about it.

KawiRider · February 20th, 2011, 01:17 AM

My Ninjette is jetted with a full Yoshi TRC. My girl's is not jetted, with a Two Bros slip on (how we bought hers).. My bike runs much smoother all through the RPM range and definitely has better acceleration. I have ridden both bikes on the highway and mine feels smoother.. Jetting also helps when starting the bike... I notice my bike tends to fire up and stabilize much faster than hers. Usually within ten to 15 seconds, I can thump the throttle. Starting her bike is like waking up a drunk friend.. It's awake, but isn't liking it until warmed up. You can't touch the throttle until it runs for a minute or it will choke on the fuel and die, everytime.

coondog · February 20th, 2011, 08:27 AM

leave well enough alone, you have a great bike great deal don't muck it up throwing good money after bad. they love running 80 @ 11k and and can do it all day long plus your twisty route hasn't put up a fight, you're in fine shape as is.

Jinx250 · February 21st, 2011, 07:44 AM

Quote:

Originally Posted by kamikaze

my only complaint is the hard starting. if shimming needles or a re-jet will fix this, then I think that's what I'm going to do.

Fixing the idle mixture screws is the only proper way to address this. People use the shimming as a secondary method to avoid messing with the idle mixture screws, becuase you have to pull the carbs to do them.

insightt47 · March 4th, 2011, 02:56 AM

theres a good tutorial on jetting on the forum

February 16th, 2011, 07:42 AM	#1
eddiekay ninjette.org certified postwhore Name: eddie Location: Lawnguylind Join Date: Nov 2009 Motorcycle(s): 300, WeeStrom Posts: A lot.	to jet or not to jet...that is the questi..... Jetting gets a lot of attention on this forum. So...I have to wonder if I should give it a try. Really...I spend most of my time @ 75-80 on highways getting to the 30 minutes worth of twisties i can find. Does my bike run rich or lean ? I dunno and i dont care because it does exactly what I want it to do all the time...but am I missing better performance simply because I'm used to what it does. I came down to a 250 not expecting much and I've been amazed at how much these bikes can do. Pipes, removed snorkels, jetting...I mean...as a fully noob mechanic these things all sound like fun but...what will I get for my trouble ? So far..I've washered the forks ( thanks KKIM) love it. Swapped the sprockets ( thanks to a bunch of guys) I love it so...both ninjette.org mods have been excellent and now I'm thinking about trying what everybody else seems to be doing...so what might I expect..again, given that I'm 101% happy with how she performs. What do you think ?

February 16th, 2011, 08:27 AM	#2
almost40 ninjette.org Monkey Spank Name: Kevin Location: Illinois Join Date: Apr 2009 Motorcycle(s): 2008 250R Track-Bike Woodcraft clip-ons and rearsets FZ-6 track bike Posts: A lot.	If it aint broke, dont fix it. ENJOY __________________________________________________ Black 250R Full Area P QC Dyno Jet Kit 100 main 41T Rear Sprocket

February 16th, 2011, 08:50 AM	#3
V2Neal Bad-ass 250 racer Name: Neal Location: Minnesnowta Join Date: Nov 2010 Motorcycle(s): Ninja 250r, ATK 605, Honda CR250R Posts: 91	Unless you've added a pipe or something else, I wouldn't bother with it. Spend more time riding. __________________________________________________ CRA #28. Just wave as you go by!

February 19th, 2011, 08:41 PM	#11
peachdiddy Former ninjette rider Name: Andy Location: Hibbing, MN Join Date: May 2010 Motorcycle(s): 2011 Honda CB1000R Posts: 121	I honestly do NOT want to work on my Ninj. Would a dealer be willing to shim the needles and adjust the mixture screws? I'd just hate to wreck my first motorcycle __________________________________________________ We've witnessed your human capacity for war. It would absolutely bring more harm than good.

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February 16th, 2011, 11:34 AM	#5
HKr1 IC2(SW) Name: Kerry Location: Pensacola Join Date: Nov 2008 Motorcycle(s): . Posts: A lot.	Jetting makes the bike feel and ride better, thats stock pipe or aftermarket. But, its a little harder than putting a rear caliper on

February 16th, 2011, 10:03 PM	#6
eddiekay ninjette.org certified postwhore Name: eddie Location: Lawnguylind Join Date: Nov 2009 Motorcycle(s): 300, WeeStrom Posts: A lot.	Naw...like i said...this bike does everything I ask but still, with all the chatter goin' on here about jetting...I was wondering if I might be missing something. Thanks for the opinions.... besides, I'm planning a major mod sometime the spring...I'm gonna clean AND wax it !

February 18th, 2011, 09:21 AM	#7
Jinx250 Smoker Name: Bob Location: SoCal Join Date: Dec 2010 Motorcycle(s): Guess.... Posts: 556	A loooot of people think the bikes need to be rejetted right out of the box. In actuality, all that needs to be done IMO is to adjust the idle mixture screws. Once those are set properly, you should be good to go if you haven't modified the intake or exhaust.

February 18th, 2011, 11:51 AM	#8
setasai ninjette.org certified postwhore Name: Brian Location: Detroit, MI Join Date: Jun 2010 Motorcycle(s): 2009 Ninja 250R Green Posts: A lot.	Sounds like you love the way it rides as is. If that's the case, leave it be and ride more. Rejetting for no reason wont make it "more" fun to ride if riding is what you want to do. I only did small mods while stuck in the house because of rain season but I've planned it nicely so that when the rain stops, the bike is still ready to go. Btw, wash and wax! super pretty.

February 18th, 2011, 10:04 PM	#9
kamikaze ex-ninjette.org guru :o Name: Trevor Location: Barrie, Ontario Join Date: Jun 2010 Motorcycle(s): 2003 SV1000 S Posts: 475	my only complaint is the hard starting. if shimming needles or a re-jet will fix this, then I think that's what I'm going to do.

February 18th, 2011, 10:07 PM	#10
kkim Join Date: Nov 2008 Posts: Too much.	shimming will help the hard starting... so will adjusting the mixture screws, but that's a lot more work than shimming.

February 20th, 2011, 01:17 AM	#13
KawiRider ninjette.org member Name: Derek Location: Lexington, Ky Join Date: Oct 2010 Motorcycle(s): '08 and 09 Ninja 250R Posts: 74	My Ninjette is jetted with a full Yoshi TRC. My girl's is not jetted, with a Two Bros slip on (how we bought hers).. My bike runs much smoother all through the RPM range and definitely has better acceleration. I have ridden both bikes on the highway and mine feels smoother.. Jetting also helps when starting the bike... I notice my bike tends to fire up and stabilize much faster than hers. Usually within ten to 15 seconds, I can thump the throttle. Starting her bike is like waking up a drunk friend.. It's awake, but isn't liking it until warmed up. You can't touch the throttle until it runs for a minute or it will choke on the fuel and die, everytime.

February 20th, 2011, 08:27 AM	#14
coondog ninjette.org sage Name: john Location: Palm Beach County, Fl Sligo County, Eire Join Date: Dec 2010 Motorcycle(s): 2005 ninja 250 street fighter, 2008 street fighter ninja 500, 2001 nsr 125 Posts: 812	leave well enough alone, you have a great bike great deal don't muck it up throwing good money after bad. they love running 80 @ 11k and and can do it all day long plus your twisty route hasn't put up a fight, you're in fine shape as is.

March 4th, 2011, 02:56 AM	#16
insightt47 ninjette.org member Name: Jacob Location: Perth Join Date: Sep 2010 Motorcycle(s): Ninja 250r 2010 Posts: 18	theres a good tutorial on jetting on the forum