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Thread: Disable oil injector and pre-mix ratio for lt80

  1. #1
    Join Date
    Jan 2007
    Location
    San Diego
    Posts
    6

    Disable oil injector and pre-mix ratio for lt80

    Hello. I have an lt80 (2001) that had low compression. I have removed the piston and cylinder and itís in the shop being reworked. The piston was heavily worn, with deep gouges thru out. The shop could not say it was lack of oil (the injector could have run dry at one point and it overheated-I was not the original owner). They recommend disabling the injector pump (kit runs $35.00) and running pre-mix. This certainly guarantees no oil problems in the future. My question is; they recommend a ratio of 32:1 (5oz of oil to 1.25 gallons of gas). Does this seem reasonable for this bike? There are no specs for this on the bike that I am aware of. The last thing I want to do is damage a new top end rebuild. Thanks in advance.
    ..Matt

  2. #2
    Join Date
    Jul 2006
    Location
    Fredonia, KY.
    Posts
    138
    Yes that is good.... we sometimes run 50-1 at races....so 32-1 should be fine..............

  3. #3
    Join Date
    Mar 2004
    Location
    East Springfield Pa.
    Posts
    2,370
    32:1 is corect by my thinking. Some oils are made for 50:1.
    $35 seems high for the kit. All they have to do is pull off the lil plastic thing that drives the pump on the end of the crank.
    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 2006
    Location
    Ambler, PA
    Posts
    35
    I am going to change my son's lt80 to pre-mix also. Do you need to pull the oil injector pump out also and put in a block off plate, or just disconnect the "plastic thing"?
    Thanks,
    Michael

  5. #5
    Join Date
    Mar 2004
    Location
    East Springfield Pa.
    Posts
    2,370
    The plastic drive is the only "have to". The rest is bling.
    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
    Sep 2005
    Location
    TN
    Posts
    170
    Any pics of the injector while you had if off? If so I would like to see.

  7. #7
    Join Date
    Mar 2004
    Location
    East Springfield Pa.
    Posts
    2,370
    Mark, We don't take the injector pump off. We remove the lil plastic t[iece that drives the pump. It's on the end of the crank shaft.
    After that, you can use a piece of toothpick in the line or byuy a rubber piece to block off at the carb.
    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

  8. #8
    Join Date
    Sep 2005
    Location
    TN
    Posts
    170
    Thanks Jack.

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