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  1. #1
    Avi8tor's Avatar
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    Found my problem for torched #3 cylinder on ported GPR. New jug?

    I had smoked #3 cylinder on my ported 1300 pv motor. Leaktest was perfect, injectors spraying normally, was really scratching head but think I've found the problem.
    When I was cleaning the cylinder I found little crack between exhaust port and intake port right where piston was damaged. I can even feel it with my nail.

    Is sleeving it an option or look for a new jug or ? How would you fix it? The cylinder was ported and re-nikasiled less than 20 hrs ago

    Click image for larger version. 

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  2. #2
    Moderator OsideBill's Avatar
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    You can get these repaired. Millenium Technolgies strips the plating welds the crack and replates the cylinders. It is best to go through someone like Lowell or Woody to have this done as there is some port cleaning and detail work to be done after the weld repair and prior to plating.

    I do believe this is a result and not a cause of the failure.

  3. #3
    Avi8tor's Avatar
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    Quote Originally Posted by OsideBill View Post
    I do believe this is a result and not a cause of the failure.
    Im sending injectors off today, cheers, heres to hoping they find the cause.

    Compression good, leakdown solid holding pressure for hours, no leaks, makes me think it almost has to be fuel injector related.

  4. #4
    Avi8tor's Avatar
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    Sending out for repair unless find a used virgin one

  5. #5
    Every adventure comes to an end........ Not Today! wreckingball's Avatar
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    I had a crack very close to where yours is. Mine was just about 3/8" further into the exhaust port and was allowing the cooling water to mist into my exaust. The mist developed into a spray and locked my motor when the RPM's were low (water was also washing the piston and gauled the cyl wall and piston was ruined).
    I sent my cyl to PowerSeal USA in PA. Total bill for welding/nicasil/shipping was $251.00. Total down time has been 2 weeks. I paid for 2 day shipping from CA to PA. I just got it back on Friday.

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