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Thread: Oil pump removal

  1. #1
    Join Date
    Oct 2004
    Location
    Northern Western Washington
    Posts
    599

    Oil pump removal

    How are most of you doing this? It sounds like everyone is also going leaner on the main jet after this. Any thoughts?
    Charlie Don't Trike

    85' ATC 350X
    85' YTM 225DR
    85' ATC 250SX
    85' ATC 200X
    84' ATC 200 autoX
    85' ATC 70
    85' YT 60
    83' ALT 50

  2. #2
    Join Date
    Oct 2003
    Location
    southwest Kansas
    Posts
    496
    When I removed it from both of my LT80's I just removed the tank and lines. Pulled the side cover and removed the drive so the pump wouldnt turn. Plugged the fitting going into the carb. I never removed the upper portion of the pump. I suppose a block off plate would make it look nicer. I know one had a 92 main jet and the engine was stock. Well it had been bored and awiseco installed.
    1989 trx250r-few mods
    1998 500 scrambler-wifes
    2007 Kymco 250 Mongoose-mydaughter
    2007 250ex-my boys
    1986 ATC250r Project

  3. #3
    Join Date
    Mar 2004
    Location
    East Springfield Pa.
    Posts
    2,370
    They can go leaner (87.5 or 90) with or w/o the oil injection.
    2000 GNC 5N\
    2001 GNC 9N \ 40+ class
    2004 GNC 9N /
    2014 rock crusher "GO tortoise GO!"
    2016 Byrd Rooster
    Father of the "11" time National champion,and worlds fastest woman ATV racer
    A few fast LT80's
    250R~300cc's
    300ex
    350 Rancher
    Kymco Mongoose
    Survivor of the 12 Hours of ATV America 04 and 05

  4. #4
    Join Date
    Oct 2004
    Location
    Northern Western Washington
    Posts
    599
    That is what I thought. Sean told me he was running an 87.5.


    I'm gonna run 40:1, that sound right to you LT80?
    Charlie Don't Trike

    85' ATC 350X
    85' YTM 225DR
    85' ATC 250SX
    85' ATC 200X
    84' ATC 200 autoX
    85' ATC 70
    85' YT 60
    83' ALT 50

  5. #5
    Join Date
    Mar 2004
    Location
    East Springfield Pa.
    Posts
    2,370
    I recommend that you mix at the oil company's recommended mix ratio (some are 50:1)
    Most run good at 32:1 but that's not sayiong that 40:1 isn't just fine. Oil type means alot in this area. Let the plug color guide you. Try at 32:1 and 40:1 and see which ratio gives a better color.

    My favorite oil is Torco GP-7 synthetic.
    Torcousa.com
    2000 GNC 5N\
    2001 GNC 9N \ 40+ class
    2004 GNC 9N /
    2014 rock crusher "GO tortoise GO!"
    2016 Byrd Rooster
    Father of the "11" time National champion,and worlds fastest woman ATV racer
    A few fast LT80's
    250R~300cc's
    300ex
    350 Rancher
    Kymco Mongoose
    Survivor of the 12 Hours of ATV America 04 and 05

  6. #6
    Join Date
    Oct 2004
    Location
    Northern Western Washington
    Posts
    599
    Our 50's run Motul 800, so I'm gonna give that a shot, to try to keep things simple for Mom
    Charlie Don't Trike

    85' ATC 350X
    85' YTM 225DR
    85' ATC 250SX
    85' ATC 200X
    84' ATC 200 autoX
    85' ATC 70
    85' YT 60
    83' ALT 50

  7. #7
    Join Date
    Oct 2004
    Location
    Allentown
    Posts
    257
    i was wondering if someone could tell me how to remove the oil injector on a LT 50? Thanx.
    2006 LT-R450

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