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Project Stu's 1990 EX250F

Discussion in 'Your 250cc Projects' started by Stubanger, Jul 14, 2019.

  1. Stubanger

    Stubanger Well-Known Member Premium Member

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    South Australia
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    My Bike:
    1981 Yamaha SR250 + many more
    1990 Kawasaki EX250F Ninja:
    20190714_130853-800x600.jpg
    70,000kms, has been sitting for 5+ years. Brakes are all seized, tanks full of crud along with the carbs. I've been looking to add a ninjette to the fleet for a while so we'll see how this one goes.
    20190714_161937-800x600.jpg
    I didn't have much time today but I got the carbs disassembled and into the ultrasonic cleaner. Luckily the diaphragms are ok. Looks like it needs the works,chain,sprockets,front and rear brake master cylinders rebuilt,tyres,oil,coolant,fuel lines and my favourite.....fork seals! I got the carbs reassembled and back on the bike,flushed the tank and attempted to start her up. Note I did pour some oil down the bores prior to this and wound her over a few times hours before pulling the carbs. I also gave the plugs a clean up with the wire brush but all I got was a few backfires. Pulled the plugs again,soaked, dried them off and tried again. Another backfire and a flat jump pack. That's all for today.
     
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  2. Murdo

    Murdo The Good Doctor Staff Member Premium Member Ride and Events Crew Contributing Member

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    My Bike:
    Maico 250, Royal Enfield 250, CF 250 V5 and 650TK, XL250, CBR250, ZZR250 plus a few others.
    "We'll see how this one goes."
    When tuned correctly they go very well and ride nice on the road.
     
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  3. Stubanger

    Stubanger Well-Known Member Premium Member

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    My Bike:
    1981 Yamaha SR250 + many more
    Bought some new plugs this morning and cranked the idle up on the carbs and she started first pop. Wont idle under 4-5k rpm though as the fuel tap needs a rebuild kit(fuel still flows when the not under vacume). Gonna take a couple weeks to get that one in. Stoked that she runs well and revs cleanly to redline, got it up to temperature and everything seems to be ok.

    In the mean time I'll strip the front and rear brakes into the ultrasonic cleaner and wait for the rebuild kits to arrive. It's a shame the previous owner let the brake fluid run down from the master cylinder all over the fairing :( I'll also do coolant flush and oil change.
     
  4. Stubanger

    Stubanger Well-Known Member Premium Member

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    1981 Yamaha SR250 + many more
    Dont worry @Murdo my other projects are still here, patiently waiting their turn.
     

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