October 12th, 2013, 11:15 AM | #1 |
Wannabe Reborn
Name: Unregistered
Location: Cincy Ohio
Join Date: Mar 2009 Motorcycle(s): Blue 2008 Ninja 250 Posts: 302
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Got another 250...Need a little help with jetting
Got another 08 250 after selling my first 08 250 4 years ago. Bought this one used with 8k miles on it for a steal. Going to want to do some modifications over the winter to get it back to where I was moving with my first one, before kids ruined that dream...
Bike already has a Jardine RT5 slip on/possibly full, havent pulled fenders off yet. Want to: -remove airbox, add K&N pods -swap out front sprocket for a 15T -jet carbs Need help with jetting. Anyone running something similar and can give me a starting point as far as jet size? In Ohio, don't do any extreme altitude riding. Any help appreciated. ~Thanks
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October 12th, 2013, 12:06 PM | #2 |
ninjette.org guru
Name: Kevin
Location: Madison
Join Date: Apr 2013 Motorcycle(s): 2004 Ninja 250 Posts: 465
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110 mains probably. And screws 2.5 turns out. 2 shims under each needle. Honestly I would keep the airbox and remove the snorkel and call it good. Especially if you dont feel like messing with jetting alot. Granted you may need to rejet even if you only did that airbox mod, as the pipe will change things too
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October 12th, 2013, 12:37 PM | #3 |
ninjette.org member
Name: Jeremiah
Location: Jacksonville, Arkansas
Join Date: Sep 2013 Motorcycle(s): '06 Kawasaki Ninja 500 Posts: 71
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There are a lot of videos on YouTube that may help you on jetting the carbs.
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October 12th, 2013, 04:32 PM | #4 |
RIP Alex
Name: Cuong
Location: Houston, TX
Join Date: Apr 2011 Motorcycle(s): '10 250r, '09 265r Posts: A lot.
Blog Entries: 2
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http://www.ninjette.org/forums/showthread.php?t=10208
Jetting database. Check out the DIY section in the tech section for more info about tuning.
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October 12th, 2013, 05:48 PM | #5 |
Wannabe Reborn
Name: Unregistered
Location: Cincy Ohio
Join Date: Mar 2009 Motorcycle(s): Blue 2008 Ninja 250 Posts: 302
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Thanks all.
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" If you're here to show off and prove that your crotch rocket is faster than my Harley, you can leave now. " |
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October 13th, 2013, 08:54 AM | #6 |
ninjette.org member
Name: oswaldo
Location: Clarksville,Tn
Join Date: Jun 2013 Motorcycle(s): 2010 Kawasaki Ninja 250R (Passion Red, Ca Model) Posts: 107
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I have a full exhaust and Uni Pods. I'm running DJ 108 mains, needle in the 3rd position two washers on top. The screws I don't know I lost track of the turns after a long day of messing around. The pods are very loud, you can hear alot of intake noise btw.
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I would be rich by now if I had a dollar for every person that has told me "You need to upgrade, You need a bigger bike, You need more power..." |
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October 13th, 2013, 09:57 AM | #7 |
Wannabe Reborn
Name: Unregistered
Location: Cincy Ohio
Join Date: Mar 2009 Motorcycle(s): Blue 2008 Ninja 250 Posts: 302
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Yeah everything I've read said they're loud. I'm not concerned, this Jardine is pretty loud. I'm looking to give the bike a little boost to compensate me changing the sprockets to ride better for highway. I have a 30 min commute to work all highway, so that's 90% of all my riding.
I ordered Factory Pro Stage 3 kit, with K&N filters. So I'm pretty sure with that, I can achieve what I need.
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" If you're here to show off and prove that your crotch rocket is faster than my Harley, you can leave now. " |
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October 21st, 2013, 04:12 AM | #8 |
Wannabe Reborn
Name: Unregistered
Location: Cincy Ohio
Join Date: Mar 2009 Motorcycle(s): Blue 2008 Ninja 250 Posts: 302
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So, pulled airbox, added Factory Pro stage 3 jet kit. I installed 112 mains, left stock 38 pilot jet in, set mixture screws to 2.5 out, and added 3 washers to needle at 3rd clip. Couple quick questions:
-I placed e-clip in 3rd position as instructed by Factory Pro. They recommended 3 washers also to start. I placed these washers on top of e-clip, closest to the blunt end of needle. Is that correct? I recall reading on Factory Pro document this prevents needle bounce? -having a slight hesitation between idle and 4k rpm, at 4k it grabs and takes off rather well thru redline. Would this be an indicator of needing to go higher on needle position, or idle mix screws? Thanks!
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" If you're here to show off and prove that your crotch rocket is faster than my Harley, you can leave now. " |
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October 27th, 2013, 05:31 PM | #9 |
Wannabe Reborn
Name: Unregistered
Location: Cincy Ohio
Join Date: Mar 2009 Motorcycle(s): Blue 2008 Ninja 250 Posts: 302
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Put a few miles on bike with previous setup and wasn't happy with it. Pulled fairings and tank, pulled needless out and placed 2 washers under e-clip, left 3 on top. Actually put an e-clip on top of 3 washers to secure them as 2 washers were laying in the diaphragm area when I disassembled.
After a brief ride less than 5 miles, found much better than previous setup. Dead zone around 4k (1/4 OT?) went away, less or no popping on decel. I'll leave it here for now until next spring when I can get longer rides. Thanks for the help.
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" If you're here to show off and prove that your crotch rocket is faster than my Harley, you can leave now. " |
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October 27th, 2013, 06:59 PM | #10 |
ninjette.org member
Name: oswaldo
Location: Clarksville,Tn
Join Date: Jun 2013 Motorcycle(s): 2010 Kawasaki Ninja 250R (Passion Red, Ca Model) Posts: 107
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Glad it worked out for you Them darn carbs can be real finicky and annoying!
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I would be rich by now if I had a dollar for every person that has told me "You need to upgrade, You need a bigger bike, You need more power..." |
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October 28th, 2013, 09:55 PM | #11 |
ninjette.org member
Name: David
Location: Minglanilla, Cebu, Philippines
Join Date: Jun 2013 Motorcycle(s): 2012 ninja 250R Posts: 28
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put stage 3 on my 2012, dynojet, yoshi slip on, K&n slip ons, got rid of air box, wow, a 250 that has balls. went exactly as dyno jet stage 3 said in directions, almost perfect, turned in air fuel 1/5 turn from that recommendation and it made a big diff, to me, no more whoof, big gas burp when shut off fast then open again, which occurred seldom, but did, now thats gone and i am glad I did all the upgrades. totally different little bike, not sure if I will go to 15 tooth front cuz no real long straights here in the islands, and I like the turns anyway
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