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Project Linkin's 1989 GSXR-250R GJ73A

Discussion in 'Your 250cc Projects' started by Linkin, Jan 12, 2020.

  1. Jethalter

    Jethalter Active Member Premium Member

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    wanna swap cams ;););)
     
  2. kiffsta

    kiffsta Administrator Staff Member Dirty Wheel Club Contributing Member

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    If you need parts.... mine is stripped down and in a box On the mezz floor , I don’t see myself getting to it anytime soon and have plenty of bikes to keep me busy
     
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  3. Jethalter

    Jethalter Active Member Premium Member

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    if i recall the GSX-R 250 was a good cam upgrade for the across
     
  4. Linkin

    Linkin The Apprentice Premium Member Dirty Wheel Club Contributing Member

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    Thanks I'll send you a PM later with a shopping list :D
     
  5. Jethalter

    Jethalter Active Member Premium Member

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    i wonder if the carb spacing from the gsxr is the same as the across
     
  6. Linkin

    Linkin The Apprentice Premium Member Dirty Wheel Club Contributing Member

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    I still have a spare set of carbs coming from the seller, I can measure up the distance between each carb throat and let you know.

    Never seen an across cylinder head, do they have provisions for an inlet manifold per cylinder? I seem to recall that they are dual twin throat carbs with only two inlet manifolds.
     
  7. Jethalter

    Jethalter Active Member Premium Member

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    yeah inlet side they are one per, airbox side they are dual.
    i know the gsxr has different angles to the across, so you cant head swap. but i'm wondering if they the same spacing and port od. would be cool to ditch the across carbs for something that doesn't have bakalite slides.
     
  8. Linkin

    Linkin The Apprentice Premium Member Dirty Wheel Club Contributing Member

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    Today I went poking around the cooling system on the GSXR, as the thermostat housing was dripping. The coolant swelled the spark cap seals on #3 so I'll have to replace those.

    Thermostat housing was pretty rough inside with corrosion, scale and coolant crystals, so I spent some time cleaning it up on the wirewheel (inside and out) and finished the mating surfaces on a belt sander. Need a new thermostat o ring to stop the leak.

    Moved on the water pump, same story but not as bad as the thermostat. Impeller is good.

    Refilled with fluids and sprayed threebond down the ports and cranked it over, repeat x3 and let it sit.

    Litetek kit ordered last week, need to order some new emulsion tubes and replace all the jets, can't find keyster kits so might have to go genuine, I also have one cracked slide housing, second set of carbs coming from the seller of the bike. Have to order new manifolds and air box boots, as well as clamps (discontinued) and it would be a runner.

    Fuel tap was messy with rust but cleaned up enough to be serviceable.

    Once I have it running I will decide how far I will go with restoration, to be rideable it needs fork seals, tyres, brakes, final drive and some correct length shock dog bones.

    Wondering whether to order bits and pieces as I need them or do a big order and have it all in one hit and one postage cost.

    As usual all the parts websites have the wrong bits listed, even down to tyres... it has an 18" rear and runs the same sizes as the zxr's - 110/70/17 and 140/60/18. Have to check what the steering geometry is in comparison, zxr's are sporty but uncomfortable, hope the GSXR is better in that regard.
     
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  9. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Check the needles and emulsion tubes first. They might be okay. Same with the jets, if they clean up okay no need for new ones.
     
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  10. Linkin

    Linkin The Apprentice Premium Member Dirty Wheel Club Contributing Member

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    Needles are ok, tubes are ovalled out and all the jets are blocked solid and mangled, believe me if I could get it going right now I would have, I want to ride it!
     
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  11. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    How about the spare set of carbs that was supposed to be coming?
     
  12. Linkin

    Linkin The Apprentice Premium Member Dirty Wheel Club Contributing Member

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    Transport company doesn't take loose parts, the seller is going to send them in the mail along with the receipt of sale for the bike which he forgot before.
     

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