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  1. #1
    JKR1300's Avatar
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    Blocking oil injection ports

    Was wondering how guys running pre-mix blocked off their oil injection ports. I just found a leak on mine while doing a pressure check. I have rubber caps with zip ties. I'm thinking of filling the openings with JB weld. BTW always pressure check your engine after rebuild. It will save you $ in the long run. Lowell sells a nice kit for the 1300 efi.


  2. #2
    Mike xsockguyx's Avatar
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    Quote Originally Posted by JKR1300 View Post
    Was wondering how guys running pre-mix blocked off their oil injection ports. I just found a leak on mine while doing a pressure check. I have rubber caps with zip ties. I'm thinking of filling the openings with JB weld. BTW always pressure check your engine after rebuild. It will save you $ in the long run. Lowell sells a nice kit for the 1300 efi.
    I wouldn't fill those injection holes with jb weld. But use those rubber caps with zip ties thats what majority of everyone uses

  3. #3
    Its better to burn out than fade away christian79's Avatar
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    I think that is what he is using now. You can fill the holes if you want. I used 5 minute multi-metal Epoxy. I used a syringe to push it through the hole. It sets in five minutes so you have to be quick. Once it drys just sand it down 99% of the way with a rotary tool and let it go. You could take the last 1% off with paper but then you are left with the question..... Do I want to polish the bore??????? I don't know if there is any gain and it IS alot of work. You can also just wipe the excess off while it is still wet and then clean off the residue with lacquer thinner. Either way you should be fine.

    Good Luck

    Quote Originally Posted by xsockguyx View Post
    I wouldn't fill those injection holes with jb weld. But use those rubber caps with zip ties thats what majority of everyone uses

  4. #4
    You can use the rubber caps and zip ties, but fill the rubber cap with 1211/1194/YamaBond then zip tie them. I've never had one leak doing it that way

  5. #5
    All hail the Chief! fullboogie's Avatar
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    How could you have a pressure leak at the oil injection barbs? That doesn't make sense - aren't the barbs before the throttle blades?

  6. #6
    krispaintballz's Avatar
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    Quote Originally Posted by fullboogie View Post
    How could you have a pressure leak at the oil injection barbs? That doesn't make sense - aren't the barbs before the throttle blades?

    I was thinking the same thing.

  7. #7
    JKR1300's Avatar
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    Quote Originally Posted by fullboogie View Post
    How could you have a pressure leak at the oil injection barbs? That doesn't make sense - aren't the barbs before the throttle blades?
    The barbs are in the rubber 'boots' where the throttle bodies attach. To do pressure check, you put plugs where the throttle bodies attach. This leak checks all the intake gaskets including the oil injection barbs.
    http://www.2-stroke-porting.com/EFI%...t/album/1.html

  8. #8
    Its better to burn out than fade away christian79's Avatar
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    He must be doing a leak-down test with the plates on the top of the carb body. I would imagine that the throttle blades are not 100% air tight.

    Quote Originally Posted by fullboogie View Post
    How could you have a pressure leak at the oil injection barbs? That doesn't make sense - aren't the barbs before the throttle blades?

  9. #9
    JKR1300's Avatar
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    Quote Originally Posted by christian79 View Post
    He must be doing a leak-down test with the plates on the top of the carb body. I would imagine that the throttle blades are not 100% air tight.
    Throttle bodies are removed for pressure check

  10. #10
    Its better to burn out than fade away christian79's Avatar
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    Oh you have a 1300R sorry about that. Where are the oil ports on the 1300R?


    Quote Originally Posted by JKR1300 View Post
    Throttle bodies are removed for pressure check

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