June 5th, 2011, 06:18 AM | #121 |
Ridin Dirty
Name: Ed
Location: Delaware
Join Date: Jun 2011 Motorcycle(s): 2011 white se 250r , 2008 zx6R Posts: 921
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im about to try this on mine.. so if im understanding this correctly, to do the shims just pull the black cap off the carb and the needle just pulls right out of the carb? then just slide 2 washers on and reinstall, repeat for other one? im at sea level with stock exhaust, so 2 shims would be about right for my setup with snorkel removed?
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June 5th, 2011, 09:30 AM | #122 | |
ninjette.org sage
Name: Jason
Location: Mississauga
Join Date: Mar 2011 Motorcycle(s): 09 Ninja 250r Posts: 634
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June 5th, 2011, 01:54 PM | #123 |
Ridin Dirty
Name: Ed
Location: Delaware
Join Date: Jun 2011 Motorcycle(s): 2011 white se 250r , 2008 zx6R Posts: 921
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yeah i got it.. went to radioshack and picked up the washers and tore it all apart.. makes a noticeable difference , nice mod!
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June 20th, 2011, 09:16 PM | #124 |
ninjette.org member
Name: Tim
Location: philly
Join Date: Mar 2011 Motorcycle(s): 2010 ex250 (Blue) Posts: 63
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Hey Kkim, would you be able to upload the pictures again? I'm looking to do this mod in a few days and while I'm sure I could manage without them, I love to get a look at things before doing it.
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June 20th, 2011, 09:22 PM | #125 | |
Join Date: Nov 2008 Posts: Too much.
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June 20th, 2011, 09:25 PM | #126 | |
ninjette.org member
Name: Tim
Location: philly
Join Date: Mar 2011 Motorcycle(s): 2010 ex250 (Blue) Posts: 63
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June 20th, 2011, 09:32 PM | #127 |
Join Date: Nov 2008 Posts: Too much.
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have you/are you going to shim your needles or install a jet kit?
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June 21st, 2011, 09:46 AM | #128 |
ninjette.org member
Name: Tim
Location: philly
Join Date: Mar 2011 Motorcycle(s): 2010 ex250 (Blue) Posts: 63
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The plan is to shim my needles with two washers each.
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July 14th, 2011, 02:44 PM | #129 |
ninjette.org certified postwhore
Name: Eric
Location: Murfreesboro, TN
Join Date: Jun 2011 Motorcycle(s): '13 300 Posts: A lot.
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reviving this thread, instead of making a whole new topic.. as my question pertains to this exact topic.
After removing snorkel (no, I did not shim (yet)... if it even needs it?) I am feeling a lot more heat on my inner thigh coming directly from that area. Is that normal? Also how exactly do I tell if I need to shim my needles? I see no signs of it running rich or lean now (seemed a bit rich to begin with). http://www.ninja250forum.com/forum/i...p?topic=3784.0 Bike seems to run great now, power kicks in about 4-4.5k rpm and pulls harder throughout all gears. Idle to warm up now is smoother, needs 0 choke and ready to take off in >2 mins. The snorkel only seems to restrict a minimal amount of air from the 3" hole (there's only a small thin piece of rubber seperating it in to 2 'ports'). It's seems more of it's purpose then would be to direct where the air comes in from.?. |
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November 1st, 2011, 07:57 AM | #130 |
ninjette.org member
Name: Ugur
Location: Turkey
Join Date: Oct 2011 Motorcycle(s): Ninja 250R 2011 Posts: 32
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How About FI Bikes?
I also have a Fuel Injected 2011 Ninja250R. What will happen if I remove the snorkel?
As long as I know it won't have a negative effect, because ECU controls the amount of air needed. It may only help to get the needed amount easier when needed. Right? And removing the snorkel would result in water to get into the box? It may be dangerous.. Thanks |
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November 1st, 2011, 11:41 AM | #131 |
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As for water, general consensus is no, it won't get in.
I'm pretty sure the ECU controls the amount of fuel going into the cylinders, not the air at all. It just measures the temp of the air. As for actually removing the snorkel, someone did it. I believe it's earlier in the thread, but i might be wrong. let me search a little for it here... *edit* so apparently I was thinking about the Kleen Air system removal. Someone did a DIY on how to do that with an EFI 250R. If you want to do it to your EFI ninja, do it. The mix might be rich enough that the snorkel removal will lean it out. The mix might be so spot on that taking off the snorkel makes it too lean. I really don't know. Try it. The worst thing that happens is you would have to put the snorkel back on, or get a powercommander. Only way you'll know if it works is if someone tries and posts up with results. */edit* |
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November 3rd, 2011, 04:14 AM | #132 | |
ninjette.org member
Name: Ugur
Location: Turkey
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February 1st, 2012, 10:02 PM | #133 |
ninjette.org member
Name: Roman
Location: London, UK
Join Date: Aug 2010 Motorcycle(s): Ninja 250r (2009) Posts: 67
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February 2nd, 2012, 09:17 AM | #134 |
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July 16th, 2012, 05:00 PM | #135 |
ninjette.org member
Name: Canada
Location: Duncan, B.C. Canada
Join Date: Jul 2011 Motorcycle(s): 2010 Ninja 250r Posts: 80
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I removed my snorkel today. When snapping the throttle from around 4000 RPM it seems like its bogging and will pick up slightly as I roll off the throttle. Noticed most in fifth and sixth. I don't remember it doing this before. I have a dan moto slip on and two washers under the needles. I am thinking I need to add a third? I tried putting the snorkel back in but that was a PITA. My air filter is pretty dirty too so I will be cleaning that tomorrow. I will measure the thickness of the washers tomorrow, I need to bring my micrometer home. I was also thinking about drilling my slides while I am adding another washer. Would you say that I need to add another washer? And should I do my slides while I am in there? Thanks
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2010 Ninja 250 Danmoto Carbon Slip On,Factory Pro Jet Kit,K&N R-0990 Air Filter,10000K HID's,Carbon Fiber Shogun No Cut Frame Sliders & Swingarm Spools,SSR Lowering Links and more.... |
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July 16th, 2012, 05:07 PM | #136 | |
ninjette.org certified postwhore
Name: Sean
Location: Middle TN
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July 22nd, 2012, 09:57 PM | #137 |
ninjette.org member
Name: Armin
Location: St. Louis
Join Date: Jul 2012 Motorcycle(s): 2011 Ninja 250R Posts: 82
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Hmmm. so is their a place i can learn about shimming needles or whatever needs to be done so it doesnt run lean. im interested in doing this mod in the future is why im asking. I learned about carburetors but it was about a year ago and i thought it was pointless cuz FI... (stupid stupid stupid me. look at me now.)
Nvm! I found the link in the DIY section a out shimming. Ima read up on it! Last futzed with by aShifty; July 22nd, 2012 at 10:58 PM. |
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November 23rd, 2012, 03:57 PM | #138 |
ninjette.org member
Name: derek
Location: columbus, oh
Join Date: Nov 2012 Motorcycle(s): 09 250r ninja Posts: 67
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so i was wondering if you install a K&n high flow air filter should you remove the snorkel since the filter already increases air flow? thinking about shimming the needles i have a mpg growler slip on muffler with a k&n air filter and wanted to shimm to make sure im not running to lean. So my next question is how many washers should i start off with to see where i need to be
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November 26th, 2012, 12:28 PM | #139 |
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@kawaninja09
Remove snorkel or else that K&N won't do squat. Try 2 washers, see how it feels and go from there. If I were you, I would first test a pair of Keihin 100 main jets to see if the top end improves or not. No reason to not double check that you have the right size main jets when the main jets are cheap. |
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November 27th, 2012, 03:30 PM | #140 |
ninjette.org member
Name: derek
Location: columbus, oh
Join Date: Nov 2012 Motorcycle(s): 09 250r ninja Posts: 67
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thank you so much for the info i found a mech. thats gonna jet the carbs for me and make sure it set up with the right ratios. but ill probally remove the snorkel when i put the filter in.
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November 28th, 2012, 10:57 PM | #141 |
Razor's Edge
Name: Richard
Location: El Paso, San Antonio, Ennis...Texas
Join Date: Nov 2012 Motorcycle(s): 2007 Sportster XL1200C Posts: 196
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Pleanty of information on this forum...I am glad I joined.
I will also be doing some mods this weekend. At 3800 ft altitude with dry dusty conditions, 30-40s mornings and 60-70s afternoons, the bike has a slight hiccup on takeoff and great top end when cold. Once at operating temperature, the bottom end smooths out and the top end seems to be a little more limited than when cold. Starting with a shim, and maybe later with the snorkel. |
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November 29th, 2012, 12:38 AM | #142 |
Freedom for Germany
Location: This World
Join Date: May 2011 Motorcycle(s): Ninja 250R-FI Posts: A lot.
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as an information about the 250R-EFI some guys in Germany removed their snorkel and had to put it back on because the bikes were running like s**t.
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November 29th, 2012, 08:58 AM | #143 |
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Did they change their fuel maps? If not, it's not surprising they ran like crap.
Leo Vince suggests modifying the air box on the EFI bikes with a pair of 50mm diameter holes, along with using their exhaust system and piggyback ECU. I know my bike runs well with a K&N pod filter and longer runners from the pod to the TB's |
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November 29th, 2012, 05:52 PM | #144 |
Razor's Edge
Name: Richard
Location: El Paso, San Antonio, Ennis...Texas
Join Date: Nov 2012 Motorcycle(s): 2007 Sportster XL1200C Posts: 196
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So I took off my snorkel at lunch today and tested it out. At 65 degrees and virtually zero humidity, the top end seemed like heaven...though the bottom end seemed to hesitate a little more than usual, kind of like a turbo spooling up. I'll be shimming this weekend. Love the throaty sound now.
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December 1st, 2012, 05:58 PM | #145 |
Razor's Edge
Name: Richard
Location: El Paso, San Antonio, Ennis...Texas
Join Date: Nov 2012 Motorcycle(s): 2007 Sportster XL1200C Posts: 196
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Snorkel off really leaned out the lower end all the way up to about 6k rpm. I could hear the engine really struggling below 6k rpm at any speed. Once I would get to highway speeds, everything was great, just getting there felt like I was hauling a trailer behind.
Today I installed two washers under each needle. Started it up and it needed a little choke, but not much and definitely not as long. I'll be getting on it soon to see where I am at on tuning. |
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December 3rd, 2012, 08:53 PM | #146 |
Razor's Edge
Name: Richard
Location: El Paso, San Antonio, Ennis...Texas
Join Date: Nov 2012 Motorcycle(s): 2007 Sportster XL1200C Posts: 196
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The past two days since the shimming and snorkel removal have been amazing. Response is smoother and virtually immediate with throttle opening. Power lasts all the way to the top of the rev range. I am gonna ride these mods for a while until I decide where I want to go next with it.
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May 9th, 2013, 10:32 AM | #147 |
Shenron
Name: Robert
Location: Corpus christi
Join Date: May 2013 Motorcycle(s): 2012 Ninja 250 Posts: 3
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Thank you so much for this! I had the needles shimmed and with the slip on its running and idling PERFECT now with the snorkel gone. It was running good before, but now the air/fuel ratio is perfect! Got a nice little extra pull after about 4-5 grand too! Thanks a bunch!
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May 10th, 2013, 09:01 AM | #149 |
Bass Master General
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I loved the clean air filter, the bike idled better, had better throttle response, more pull from the low end, it jus ran better, moreover how it should run.
So, I popped out the snorkle, performance wasn't noticably changed, maybe worse, I think for the extra noise my brain can't understand why that doesn't make it faster so it feels slower, but from clock watching it seems to be a tad faster. What I liked, the noise, you slam the throttle wide open from 4krpm, and it BARKS! Took me back the first time I did it, I even made some german tourists just a bloody mile by doing it as I rode past, I guess the extra combustion takes a few seconds to spin the engine to where it wants to be and it creates a pressure in the air box making it woof, but it was nice. What I didn't like was the extra noise, seemed excessive, I would want to wear plugs if I did this, and I don't. What I observed, performance, maybe a little, no more popping of unburnt fuel on deceleration this just didn't happen so I guess it's now fully lean, although it didn't run any hotter from the temp gauge, if anything slightly cooler. As always, YMMV, this is applicable to the fuel injected version, carbed bikes will perform slightly differently. |
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May 23rd, 2013, 05:15 PM | #150 |
ninjette.org newbie
Name: Tad
Location: Grandrapids, MI
Join Date: May 2013 Motorcycle(s): 2009 Kawasaki Ninja 250R Posts: 2
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What is shimming? And where and what are you doing it too? I just got a 2009 ninja 250R with a two brothers exhaust. Id like to remove the snorkel but only if its not going to eff up the bike
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May 23rd, 2013, 05:21 PM | #151 | |
Bass Master General
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May 23rd, 2013, 06:10 PM | #152 |
ninjette.org newbie
Name: Tad
Location: Grandrapids, MI
Join Date: May 2013 Motorcycle(s): 2009 Kawasaki Ninja 250R Posts: 2
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Lol no dont believe that is
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May 23rd, 2013, 08:14 PM | #153 | |
ninjette.org member
Name: Josh
Location: Lake Balboa
Join Date: Apr 2013 Motorcycle(s): 2013 Kawi Ninja 300 Posts: 109
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August 12th, 2013, 09:19 AM | #154 |
ninjette.org member
Name: Chris
Location: NC
Join Date: Mar 2010 Motorcycle(s): 09 Ninja 250 Posts: 11
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Update: it is very easy to remove/install the snorkel with the battery and battery box removed. Running a GIVI case on the rear seat and didn't want to remove it and the mount. Did some investigating and there is enough room with the battery & box removed to have a party in there. 5 min max out or in.
I had everything else removed to do the valve check. |
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August 12th, 2013, 02:37 PM | #155 |
ninjette.org sage
Name: michael
Location: Central Georgia
Join Date: May 2013 Motorcycle(s): 2019 Ninja 400, Sold 2012 Ninja 650, Sold 2009 Ninja 250r, Sold 2007 DRZ400s Posts: 628
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thanks for the write up!! this is on my list to do.
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January 15th, 2015, 07:53 PM | #156 |
ninjette.org newbie
Name: erik
Location: mpls
Join Date: Jan 2015 Motorcycle(s): gsxr 6, ninja 250 Posts: 4
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would removing the snorkel without any other modifications help for high altitude riding? sounds like this might be a quick solution instead of rejetting to ride pikes peak and mt evans
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January 15th, 2015, 09:21 PM | #157 |
ninjette.org sage
Name: -
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It won't help much and might actually be detrimental. Removing the snorkel only gets a little bit more air in and isn't a substitute for proper jetting.
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January 15th, 2015, 09:32 PM | #158 | |
ninjette.org newbie
Name: erik
Location: mpls
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January 15th, 2015, 09:45 PM | #159 |
The Corner Whisperer
Name: Chris (aka Reactor)
Location: Northern KY
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I am not sure what year of 250 you have, but these bikes run pretty lean out of the box. Allowing more air without enriching the mix isn't on the plus side of things. However, many have had good results from a snorkel delete along with needle shims. YMMV due to altitude. Do a search for "jetting database", it should yield some helpful info.
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January 15th, 2015, 11:39 PM | #160 |
Ramen Rider
Name: Gary
Location: Honolulu, Hawaii
Join Date: Jan 2009 Motorcycle(s): 2015 BMW R1200R, 08 Honda VFR800A (sold), 09 Ninja 250R (sold) Posts: A lot.
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I live near sea level, so I don't know. Still, I don't think that just removing the snorkel would be of much help.
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