Ninja 250

Discussion in 'Road Warriors' started by 100mpg, May 29, 2006.

  1. MotoSailorDC

    MotoSailorDC Gnarly Adventurer

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    Can't emphasize this enough. Boil them for like 10-15 minutes and they should be fairly malleable. However - lose the boot springs. They're more of a PITA than they're worth. Swap them out for some hose clamps. It will make your life a little easier.
  2. Domiken

    Domiken Been here awhile

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    Sep 30, 2011
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    Thanks guys, the boots fit fine (they are touching the lips) but just need a few more millimeters to get them on. Ill be getting some hose clamps. The bike has a horrible hesitation in 1st gear when accelerating (it makes that tick tick tick noise cars make when you drop the clutch in first gear too fast and dont give it enough gas).
  3. facetjoint

    facetjoint TONKA

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    Phx. AZ. The land of shake and bake
    Although I do not have a NINJA yet. I have fought the carb. to air box boots on other bikes. I've used and had excellent luck with a light coating of dielectric grease on the mating surfaces. Plus the dielectric is friendly to the rubber components and does not leave a big mess to clean up.
  4. Domiken

    Domiken Been here awhile

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    Thanks for the tip
  5. RussellH

    RussellH Been here awhile

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    Nov 19, 2008
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    Cali
    [​IMG]

    My quick 400 mile report on the 2003 Ninja 250.

    It's supposed to be my gf's bike but she's not ridden it much- that's her in the pic. However, I've been busy with it :wink: Upgrades wise, I've changed the brake pads to the EBC HH Sintered pads all around, installed Pirelli M75s, .70kg Sonic fork springs are here as well as the 15T front sprocket, all of which I felt were required upgrades after spending some time on the bike and reading Ninja250.org. Next on the list is the rear EX500 shock if I can find one in decent shape. Three things I wish it had: 3" more leg room, 15-20mm fatter tires so it doesn't look like a bicycle from the back, a bit more torque/power to get ahead of the the darn cages starting at the lights - these would make it just about the perfect little bike- for me. I guess that would be the EX500 huh? :1drink

    Everytime I take it to the local canyon roads I'm grinning ear to ear, I feel like I'm going at a higher rate of speeds compared to the big ST1300, yet when I look down at the speedometer it's not that fast at all which I like. I don't need to be riding at excessive speeds to get the same grin factor as the bigger bikes. I hate to admit it but I'm having so much fun with the little Ninja that I'm actually thinking of selling the ST1300 and buying a mid-weight bike like the VFR 800, a VStrom or...call me nuts even a ZX6R/GSXR.

    For what you can buy the 250s for, the gas mileage, the low cost of parts, insurance, the ease of manueverability etc they're probably the best bang-for-the-buck bikes out there. Someone used the Miata as a refrence and I think that's spot on (having raced the Spec-Miata series for several years).

    To me the Ninja 250 is the underdog, grassroots, open-source equivalent of the bike world :lol3
  6. Jimmy the Heater

    Jimmy the Heater Tilting the Horizon

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    Amen to that! I have a Miata and a Lil'Ninja and can agree totally.
  7. LuciferMutt

    LuciferMutt Rides slow bike slow

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    Me too. And a 4th gen VFR.

    They really are fantastic little bikes!

    BTW regarding the fatter rear tire to avoid the bicycle look -- you can fit a 140 tire back there without mods I think (assuming you can find a 140 in a 16" -- I think there are some) -- but the handling suffers. I have a 120 on mine and it changes direction like a housefly!
  8. ddennis669

    ddennis669 Adventurer

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    Carrizo Plains, California
    Welcome to the Asylum. :freaky
  9. Whereabouts

    Whereabouts Been here awhile

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    Jun 29, 2009
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    Hey everyone,

    I have a quick question; I've searched all over the internet so I figured it's time to come to the definitive source. Can anyone tell we what the shock stroke is on the pre-08' EX250? If it's easier, it would be just as good to find out the eye-to-eye measurement of the shock when fully compressed or the leverage ratio between the shock and the rear wheel. Any anecdotal information in this domain would at least be a start.

    Thanks so much!
  10. gfloyd2002

    gfloyd2002 Title Free Since '12

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    Dec 11, 2011
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    If it helps, part number is Uni-Trak 45014-0234-23J. Rear travel is 5.1 in (129.5 mm).
  11. Whereabouts

    Whereabouts Been here awhile

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    I did already know the wheel travel, but thank you. Here's what I've found so far (and please correct any errors as the internet has been known to spread inaccuracies once or twice before):

    shock eye-to-eye length (extended)- 12.6"
    shock eye-to-eye length (fully compressed)- ?
    shock stroke- ?
    spring rate- 440 in/lbs
    rear wheel travel- 5.1"

    The reason I want to know is that I'm investigating suitable donors for a fairly easy shock swap to go along with a dual sport front end swap on an ex250. I would definitely want more ride height but more travel would be desirable as well since the front would probably end up with about 9" of travel.

    I know enough to know that just looking at the curb weight and wheel travel numbers of other bikes won't help me but I think that comparing the above parameters to those of the stock 250 shock should tell me something meaningful.
  12. doogiepooch

    doogiepooch Been here awhile

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    Keep us updated on the progress of this swap. I know several guys throw some agressive tires on the 250's and bomb down forest service roads but a full conversion would be very intersting.


    A question for the masses.....what are you guys connecting your auxilary outlets to? My klr had unused parking light wires up front from the factory and it was a common mod just to plug into that. Anything like that on the Ninja? I need to run a gps or phone carger. I've got the waterproof outlet, Just got to run the wiring and wanted to the easiest, proper, way to do it, I've read going to the battery is ok but would really like it tied into something that turns on and off with the key.
  13. scorch

    scorch Poser

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    man we had a great ride, about 400 miles of riding. and mostly backroads until the ride ended

    Burton at the sheetz
    https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-ash3/s720x720/562432_10151745151825109_536275108_24179566_350717702_n.jpg[IMG]


    [IMG]https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-ash3/s720x720/576678_10151745152990109_1530858705_n.jpg

    not bad for 63k miles
    [​IMG]


    smoke hole rd
    [​IMG]


    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
  14. rat110

    rat110 Has a Zombie House

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    Australia
    Well I have a zzr250. Basically the same bike with different fairings. Mine is a December 03 that I picked up with 4800kms on it. I got it in November 10. It now has 45,000 kms and still running strong. It has developed a good rattle in the engine but uses no oil and still runs well.

    Things I love about this bike are it's cheap! Cheap to run, to insure, to maintain etc. I travel 95kms each day, 5 days a week and it costs me $30 in fuel. I love its wheel stands from traffic lights. It doesn't mind a burnout to finish off it's rear tyres. It quite likes them too. I love taking it out to the street after a wash, dialing in 9,000rpm and popping the clutch, hitting the throttle stop and letting the bike bounce off the rev limiter whilst hanging it's bum out to the left by a good 30 degrees. My neighbors kids think the bike is so powerful! Lol. I'm just getting the wash residue off the tyres. Ha ha ha.

    I've done a 3300km and an1800km trip on it with heaps of camping luggage on it. Hills aren't an issue as you just drop a gear or two and gas it. Top speed on mine is about 145km/h. That's without spending 5 mins trying to get it up there. All in all, a great little bike. Could do with 10hp more, but fun all the same.
  15. bluepoof

    bluepoof insert pithy saying here

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    I just hook everything up to the battery. If I remember correctly, there are aux wires that terminate up near the steering column (at least on my '07) but I've never tried hooking anything up to them.
  16. 100mpg

    100mpg Self Imposed Exile

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    I hope someone has a quick answer for my question. :ear

    My nephews Ninja seems to have gummed up carbs. I volunteered to fix them, thinking he would be helping/doing most of the work under my direction. ha. Well, long story short, I have a ninja that need to be apart and back together running, today. solo.

    I believe it is an '08, so with that in mind can someone recommend a place to find the best way to remove the carbs for cleaning or if you have done this yourself already, clue me in on the steps on what to remove?

    Thanks.
  17. MotoSailorDC

    MotoSailorDC Gnarly Adventurer

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    Correct. There are 2 pairs of Aux wires on the 2nd generation Ninja 250. One set are at the front, and the other set are under the seat. Using the ones up front is great for a quick GPS/phone charging setup, but shouldn't be used in the long term, as there are a few issues with these wires. First off, they're always 'hot' or electrified, even if the bike is turned off with the key out of the ignition, so you have to be sure that you remove the device each and every time, or you will drain the battery. They're also in an obscene place, and are (I believe) 3/8" female spade connections. I use 1/4" male spades to connect my GPS rig to them as I couldn't find the right spade size, but it's not ideal. Right now, I run these to a cigar style plug that I keep in my tankbag. This acts as my hard on-off switch.

    The black and white wire is your positive feed. If you're planning to hook a cigar style plug to these wires, I believe that the wire that leads to the center (as opposed to the walls) of the plug is your positive. You can confirm which wire goes where with a simple multimeter, checking for resistance. Be sure to check and re-check your polarity on this - some devices will blow their feeder fuse if the polarity is switched.

    There's a great article online which details how to install an accessory fuse box, which will allow you to have your farkles on the 250 to be switched, so they turn off when the bike does, and it will also give you some fuses between the battery and your precious, precious farkles. This is one of the better solutions, and shouldn't cost more than 20-30 dollars and a few hours time. I plan to do this in the next few weeks, as time allows.
  18. bluepoof

    bluepoof insert pithy saying here

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  19. 100mpg

    100mpg Self Imposed Exile

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    I am not sure that is the problem. The bike is running so bad I am surprised he can ride it. It does not stall when the choke is full on. If I pin the throttle wide open, it will stall. I have to goose it to 2-3000 then pin it or it will stall. It is 80 degrees outside and was hard to start...stalled a few times unless I played withthe throttle a little.

    I also missread those instructions ! I thought it said half an hour to remove everything ...it actually says and hour AND a half!

    Is there anyway to narrow down the problem here with out ripping the bike apart and finding that is not the problem?

    Standing by...:ear
  20. LuciferMutt

    LuciferMutt Rides slow bike slow

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    It's the carbs. It's always the carbs. Quite problematic on the 250 if it is not ridden very regularly.