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Mai-Mai is a B!TCH!!!!

Discussion in 'Sub-forum for these Rice Burner 660 builds' started by traffic903, Jan 6, 2018.

  1. traffic903

    traffic903 Super OPE Member

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    Alright, so here is my Chinese 660 build thread that I promised. I am going to call her Mai-Mai, because I think I "may" need some Valium after dealing with some of the problems I encountered!!
     
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  2. traffic903

    traffic903 Super OPE Member

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    Case halves looked very good. Bearings were silky smooth. Aligning pins..........just picture teenage boy and brothel!!
    20180103_110357.jpg
     
  3. traffic903

    traffic903 Super OPE Member

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    Heated flywheel side half and crank dropped straight in. Didn't even need to remove the pre-installed seal, but I did have spares ready if it got damaged.
    20180103_114953.jpg
     
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  4. traffic903

    traffic903 Super OPE Member

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    Next came the PTO side installation using my home-made tool. I do still use just a small amount of heat on the bearing and it slides in just nice.
    20180103_120251.jpg
     
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  5. traffic903

    traffic903 Super OPE Member

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    Nearly there! 20180103_120701.jpg
     
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  6. traffic903

    traffic903 Super OPE Member

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    So with the case together I thought now would be a great time to install the chain adjuster. What a f&*%ing piece of s#@t! The kit version feels like it is full of river sand. It is notchy as hell, and the range of travel is roughly half that of the OEM versions. I "played" with it for a while and added some spray grease, working it back and forward til it freed up some. It is better, but not great!
    20180103_123123.jpg
     
  7. traffic903

    traffic903 Super OPE Member

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    Bar studs in next. Some thread locker for good measure. 20180103_123350.jpg
     
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  8. traffic903

    traffic903 Super OPE Member

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    Oil pickup in the hole. 20180103_124616.jpg
     
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  9. Wonkydonkey

    Wonkydonkey Super OPE Member

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    What's your homemade tool look like on the other end ?

    Cheers
     
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  10. traffic903

    traffic903 Super OPE Member

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    I wanted some timing advance. Stock woodruf key was 0.072".
    20180103_130513.jpg
    So I clamped it in the vise, filed some off and now have 0.052". The key material felt very soft to me.
    20180103_130635.jpg
     
    Last edited: Jan 6, 2018
  11. Wonkydonkey

    Wonkydonkey Super OPE Member

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    I hope that thread lock an't the hard stuff you need heat to remove,

    Just sayin if the chain tensioner give you pain later on, and the plate needs to be removed ;)
     
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  12. traffic903

    traffic903 Super OPE Member

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    It's medium, and plate slips on over top anyway.
     
  13. traffic903

    traffic903 Super OPE Member

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    Flywheel on. I made sure I torqued the nut down good and proper as I was concerned about shearing the key. 20180103_131242.jpg
    Time for the oil pump now. No problems here.
    20180103_132730.jpg
    "Grease me up woman"!!! I did just take a bee's dick of length off the end of the worm gear because it was rubbing slightly on the case.
    20180103_132942.jpg
     
  14. traffic903

    traffic903 Super OPE Member

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    Cover washer and then clutch on. 20180103_133921.jpg
     
  15. traffic903

    traffic903 Super OPE Member

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    So it came time for the cylinder. Some of you may have seen my earlier post regarding the Cross MMWS top end. Randy hooked me up and posted a kit over to Australia for me. It got here in super quick time. I just want to again thank Randy for going to the trouble. You're a top fella mate and if you take a vacation down under some time then get in touch so I can buy you some beer and take ya fishing!!
     
  16. Wonkydonkey

    Wonkydonkey Super OPE Member

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    Cool, I was sweating for a bit, I used the hard stuff by mistake before. I was in pain getting it out with a blowtorch, lucky it was an exshust bolt on a trimmer. :oops:


    Cheers
     
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  17. traffic903

    traffic903 Super OPE Member

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    The Cross cylinder looked pretty decent, but it did have a few slag balls in the inlet and the bevelling on the exhaust port floor was non existant. BUT, the biggest concern for me was the exhaust roof. It looked flatter than a piss on a plate!! I just couldn't leave it like that and feel any sort of confidence in the longevity of this build. 20180103_135800.jpg 20180103_142846.jpg 20180103_141526.jpg
     
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  18. traffic903

    traffic903 Super OPE Member

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    So I ground it a touch and then put in a bevel top and bottom. I can sleep better now! 20180103_162155.jpg 20180103_162232.jpg
     
  19. traffic903

    traffic903 Super OPE Member

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    Squish measurement was with the metal gasket supplied in the kit.
    20180103_150645.jpg
    Good number. Definitely not going any lower for a Chinese saw!!
    20180103_161439.jpg
     
  20. traffic903

    traffic903 Super OPE Member

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    Time for some timing numbers.
    20180103_171302.jpg
    Exhaust - 99.
    20180103_171335.jpg
    Transfers - 117.
    20180103_171359.jpg
     
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