February 19th, 2013, 11:09 AM | #1 |
ninjette.org member
Name: Nick
Location: Portlandia, OR
Join Date: Jan 2013 Motorcycle(s): Too many Posts: 29
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Jetting on my race bike
I've got a 2009 250r race bike that I'm in the process of tuning and re-jetting. Dyno time is crazy expensive, and since the bike isn't street legal, I'm trying to get everything as close as possible before taking it to the dyno. Can you help me try to skip some trial and error? Believe me, I know no two bikes are alike, but any time you can save me at the dyno (about $200/hr and dealing with the jerk who runs it) will be greatly appreciated.
I've read over the Jetting Database and I think I have a pretty good idea of what I need to do, just looking for some affirmation. Can you help me fill in the blanks? YEAR: 2009 INTAKE MODIFICATIONS: Stock airbox w/ K&N filter EXHAUST MODIFICATIONS: Slip on DanMoto CF w/ stock header JET KIT OR STOCK? Stock for now BRAND OF JET KIT? Probably DynoJet although any experience with the eBay brand 6Sigma? They supposedly build to suit based on your specific info. MAIN JET: XX NEEDLE AND CLIP POSITION: XX MIXTURE SCREW SETTINGS: XX ELEVATION: 0-100ft MISCELLANEOUS INFORMATION ABOUT YOUR BIKE’S JETTING SETUP: Nothing special. Race only. |
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February 19th, 2013, 12:25 PM | #2 |
Jigglin' your Jiglets
Name: Sean
Location: San Jose, Ca
Join Date: Jun 2011 Motorcycle(s): 2009 K1300S, 2013 Ninja 300, 2011 Ninja 250R, Faster than Unregistered's ninjette Posts: Too much.
Blog Entries: 1
MOTM - Apr '13
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Stock airbox and stock headers, shim the needles and your done
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If the Ninja 250 doesn't have enough power for you, then you don't know how to ride it. AFM #676 Supersports are for n00bs |
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February 19th, 2013, 12:34 PM | #4 |
ninjette.org member
Name: Nick
Location: Portlandia, OR
Join Date: Jan 2013 Motorcycle(s): Too many Posts: 29
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Thanks! You guys both have ridiculous avatars.
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February 19th, 2013, 12:39 PM | #5 |
wat
Name: wat
Location: tustin/long beach
Join Date: Sep 2009 Motorcycle(s): wat Posts: Too much.
Blog Entries: 5
MOTM - Oct '12, Feb '14
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it really depends on the atmosphere that you plan on running the bike in. i honestly would just do small changes between rounds at the races if you are able. dyno runs are expensive.
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February 19th, 2013, 12:40 PM | #6 |
Jigglin' your Jiglets
Name: Sean
Location: San Jose, Ca
Join Date: Jun 2011 Motorcycle(s): 2009 K1300S, 2013 Ninja 300, 2011 Ninja 250R, Faster than Unregistered's ninjette Posts: Too much.
Blog Entries: 1
MOTM - Apr '13
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If the Ninja 250 doesn't have enough power for you, then you don't know how to ride it. AFM #676 Supersports are for n00bs |
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February 19th, 2013, 01:07 PM | #8 |
Gear crash test dummy
Name: Max
Location: South Bay (So. Cal)
Join Date: May 2011 Motorcycle(s): 2010 Ninja 250 race bike, 2014 ZX-636r Posts: A lot.
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If you're racing a ninja 250 and only racing it then you should acquire a full exhaust system. Area P is doing a group buy for their race systems right now on this forum. look around the marketplace.
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CVMA #531 |
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February 19th, 2013, 01:46 PM | #9 | |
ninjette.org member
Name: Nick
Location: Portlandia, OR
Join Date: Jan 2013 Motorcycle(s): Too many Posts: 29
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Quote:
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February 19th, 2013, 01:47 PM | #10 |
ninjette.org member
Name: Nick
Location: Portlandia, OR
Join Date: Jan 2013 Motorcycle(s): Too many Posts: 29
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Yeah, I know. I'll pick up a header one of these days, just gotta save some $. I really only did the slip on for weight, the performance gain is marginal.
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February 19th, 2013, 01:58 PM | #11 | |
Jigglin' your Jiglets
Name: Sean
Location: San Jose, Ca
Join Date: Jun 2011 Motorcycle(s): 2009 K1300S, 2013 Ninja 300, 2011 Ninja 250R, Faster than Unregistered's ninjette Posts: Too much.
Blog Entries: 1
MOTM - Apr '13
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Quote:
I got mine from innovate, I think it was under $200, then you have to get it installed, but it is a permanent solution whereas a dyno is a solution for say February 19th, 12:56pm, 46degrees farenheit, 85 feet elevation, Humidty 99%, etc....
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If the Ninja 250 doesn't have enough power for you, then you don't know how to ride it. AFM #676 Supersports are for n00bs |
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February 19th, 2013, 02:05 PM | #12 | |
ninjette.org member
Name: Nick
Location: Portlandia, OR
Join Date: Jan 2013 Motorcycle(s): Too many Posts: 29
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Quote:
What do you want the reading to be? |
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February 19th, 2013, 02:33 PM | #13 |
Jigglin' your Jiglets
Name: Sean
Location: San Jose, Ca
Join Date: Jun 2011 Motorcycle(s): 2009 K1300S, 2013 Ninja 300, 2011 Ninja 250R, Faster than Unregistered's ninjette Posts: Too much.
Blog Entries: 1
MOTM - Apr '13
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Ideally around 12.6-13.2 but tuning these CV carbs that precisely is really difficult. If you watch my runs my afr goes rich then lean then rich, thats a byproduct of the pod filters I have in there. The stock airbox should be a lot easier to tune
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If the Ninja 250 doesn't have enough power for you, then you don't know how to ride it. AFM #676 Supersports are for n00bs |
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February 19th, 2013, 03:20 PM | #14 |
ninjette.org member
Name: Nick
Location: Portlandia, OR
Join Date: Jan 2013 Motorcycle(s): Too many Posts: 29
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Yeah I've been looking into it a bit more. Is there a rule of thumb, in terms of max/min, or a certain afr to rpm? I.e. never below 9 or above 16, or at X RPM you should have an AFR of Y.
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February 19th, 2013, 03:26 PM | #15 |
Jigglin' your Jiglets
Name: Sean
Location: San Jose, Ca
Join Date: Jun 2011 Motorcycle(s): 2009 K1300S, 2013 Ninja 300, 2011 Ninja 250R, Faster than Unregistered's ninjette Posts: Too much.
Blog Entries: 1
MOTM - Apr '13
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Well no, at WOT you always want an AFR in that range, it kinda depends on the engine as to whats best and I've seen lots of differing opinions, but without EFI its not like you'll be able to tune for 13.0 vs 12.8. If you aren't at WOT its fine if your AFR is higher but you definitely don't want to be WOT in the 14s
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If the Ninja 250 doesn't have enough power for you, then you don't know how to ride it. AFM #676 Supersports are for n00bs |
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February 19th, 2013, 03:39 PM | #16 | |
ninjette.org member
Name: Nick
Location: Portlandia, OR
Join Date: Jan 2013 Motorcycle(s): Too many Posts: 29
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Quote:
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February 19th, 2013, 04:19 PM | #17 |
ninjette.org member
Name: Nick
Location: Portlandia, OR
Join Date: Jan 2013 Motorcycle(s): Too many Posts: 29
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I've still got the issue of experimenting with the AFR gauge with a bike that's not road-legal. Maybe I'll just try to get it close and play with it in between sessions, as mentioned earlier.
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February 20th, 2013, 12:06 AM | #18 |
ninjette.org sage
Name: Abhijit
Location: San Francisco
Join Date: Nov 2011 Motorcycle(s): Many Two Wheels .. Posts: 611
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Hey Jiggles - how do you like the Innovate AFR meter ? I rented the UEGO one and it helped.
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