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  1. #1

    Join Date
    Jun 2015
    Location
    Charleston, SC
    Posts
    22

    gp1200r premix without block off

    I just rebuilt the top end on my millennium edition 1200r and i was wondering if i could drain the oil tank and run premix? I will eventually do the block off plate, probably next week just wanted to have it on the water for the 4th. I took it out to test and it stalled a few times, fired back up after sitting a few minutes, thinking it might have siezed for a second, if I still have good compression I dont want to risk it anymore.


  2. #2
    How are you breaking it in?
    And why the hell would you want to do that? A fresh top end isn't the time to dick around. Run your injection, even add 50 or 60:1 to the gas tank for some extra oiling. Seat the rings properly for a good service life. Gather the parts you need and do it right.

  3. #3

    Join Date
    Jun 2015
    Location
    Charleston, SC
    Posts
    22
    I want to do this because I want to make sure its getting oil and didnt know if i'd be good to run both oil and premix without fouling plugs like crazy. I let it idle on the trailer with the hose for 5-10 minutes, shut it off, drove it to the resevoir, about 10 mins away, put it in the water and didnt go past 1/2 throttle for about 15-20mins, let it sit at the dock to cool for about 20 minutes, put back in went to about 3/4 for about 10mins before the sky fell in. ran good but stalled a few times and when it stalled, if i hit the button right away it acted like it didnt want to spin, wait 30sec to a minute and it would fire up & run fine. I hear ya about taking some time and doing it right but when i got this thing about 6 weeks ago the goal was to have it ready by the 4th and with all the extra stuff going on i cut it a little too close

  4. #4

    Join Date
    Jun 2015
    Location
    Charleston, SC
    Posts
    22
    I appreciate the info on the premix + oil injection though, will add oil to the gas tomorrow.

  5. #5
    Man if you think for sec its not getting oiling I wouldn't run it. May want to go through the carbs and start with fresh baseline settings.

  6. #6

    Join Date
    Jun 2015
    Location
    Charleston, SC
    Posts
    22
    I hear that only reason i even suspect it is because its not smoking as much as it was at idle, the old piston had a ring sideways in the cylinder and smoked like crazy on the trailer at idle. Next step is to go through the carbs, i know it needs it but didnt get the carb kits in the package deal i got with the ski, just havent had ANY extra cash lately.

  7. #7
    If it stalled a couple times and when you hit the start button it acted like it didn't want to turn over, I think you have already scuffed a piston. Did you check compression after that ride??

  8. #8

    Join Date
    Jun 2015
    Location
    Charleston, SC
    Posts
    22
    Just got it in the shop, no compression on the middle cylinder. Dead till next year.

  9. #9

    Join Date
    Jun 2015
    Location
    Charleston, SC
    Posts
    22
    Click image for larger version. 

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ID:	364190Click image for larger version. 

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ID:	364190 Pistons toast

  10. #10
    That stinks.

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