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The definitive Katana EFI swap thread

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  • jamesbm1001
    replied
    just a question...

    If someone was wanting to do this but in a slightly easier way, and was willing to pay extra (without buying a gsxr), could they use a gsxr ECU and wiring harness and have it remapped? Also, this was probably already covered, but does the Mega squirt you're using controll timing?(i.e. does it deliver the spark?) I'm by no means an electrical expert and would definately opt for the easiest way possible to do this...again without buying a different bike.

    Leave a comment:


  • TRUEBLUE
    replied
    Excellent write up!!!!
    I'm doing the same just on a RF600. Great Information!!!!

    Leave a comment:


  • ericej2344
    replied
    Thanks for the quick response. I hate to dig deeper in my pockets, but at least I know what I'm looking for.

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  • TheSteve
    replied
    Mine actually came with the subharness for the throttles that had all the plugs for the injectors, tps, etc. Ill look around the garage to see if it shares plugs with any common cars. I do remember the tps being a strange looking one so you may be best off trying to find the subharness off a gsxr

    Heres one: http://cgi.ebay.com/ebaymotors/01-03...Q5fAccessories

    And a cheaper one: http://cgi.ebay.com/ebaymotors/01-03...Q5fAccessories
    Last edited by TheSteve; 05-03-2009, 06:20 PM. Reason: Automerged Doublepost

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  • il_ragazzo
    replied
    Originally posted by TheSteve View Post
    Well i think the hot start issues are now officially a thing of the past. A few days ago a buddy and I went on a ride up south mountain. He was on his cruiser (and hasnt been riding as long) so I was going a good bit faster than he was, so at the end of each lap I shut off the bike and waited for him. Clearly having just raced up and around a mountain the engine was probably as hot as itll ever normally get, but it was still happy to fire up on the first crank after every time I let it sit. For those who havent been following, it used to be impossible for me to run errands on the bike because after sitting in traffic then parking it would never start again till it either got jumped or cooled off. So now only one thing remains.....finding a 750, 1100, or 1200 engine for the beast and swapping it in.
    yes!!!

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  • ericej2344
    replied
    I just won a set of GSXR throttle bodies. Just wondering where did you get connectors for the injectors.

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  • TheSteve
    replied
    Well i think the hot start issues are now officially a thing of the past. A few days ago a buddy and I went on a ride up south mountain. He was on his cruiser (and hasnt been riding as long) so I was going a good bit faster than he was, so at the end of each lap I shut off the bike and waited for him. Clearly having just raced up and around a mountain the engine was probably as hot as itll ever normally get, but it was still happy to fire up on the first crank after every time I let it sit. For those who havent been following, it used to be impossible for me to run errands on the bike because after sitting in traffic then parking it would never start again till it either got jumped or cooled off. So now only one thing remains.....finding a 750, 1100, or 1200 engine for the beast and swapping it in.

    Leave a comment:


  • il_ragazzo
    replied
    well just the lack of a choke is reason enough for me to do it...and no air fuel mix to adjust when i go to Yosemite.

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  • TheSteve
    replied
    When I got my bike it wasn't running, so I've never ridden a carbed katana. So I have no idea how much improvement there is over stock.

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  • airforceranger49
    replied
    quick question for you bro... how much did this really wake the bike up... i mean is it like a whole new bike, or is it just a subtle difference?

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  • il_ragazzo
    replied
    me too

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  • Kreylyn
    replied
    Originally posted by Black_peter View Post
    Too bad you can't show it off... With the fairings on it looks stock.

    Sometimes those are the best... I love a good sleeper.

    Krey

    Leave a comment:


  • Black_peter
    replied
    Too bad you can't show it off... With the fairings on it looks stock.

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  • TheSteve
    replied
    Here are the pics of how the fairings came out:





    I'm pretty satisfied with how they came out. The only issue is it makes it more difficult to work on if and when it needs it. I can still get to the idle screw so thats ok, but it doesnt have clearance to plug in the laptop without taking off the left side tail fairing. Oh well.

    Leave a comment:


  • TheSteve
    replied
    Its been a good week for the katana. I adjusted the resistance values in the megasquirt to aid in hot starts and it seems to have helped quite a bit. I have not had the chance to try it in an overheat-start but I'm hopeful that it'll work based on how well its been doing lately. I also finally repaired, sanded, and painted the kat so its no longer quite as big of an eyesore. Ill post pics once I get home.

    Anyway, I set the resistance curve for the existing temp sensor so that at -40f it still should read around -40, but now the max temp it'll read is about 300. Of course I had to retune crank pulsewidths, warmup enrich, and afterstart enrich to match the new table but it seems to work pretty well. Now at 40f it reads somewhere around -7f so there's plenty of resolution in the upper end. Swapping to an MS2 would help this further but it seems unnecessary at this point.

    So now with the bike starting more reliably and being less sinfully ugly it seems the project is coming to an end until I again find something stupid to do to it.

    Leave a comment:

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