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Project The Yamaha R4 (Glacially Slow Project)

Discussion in 'Other Projects - Other Bikes (non 250's)' started by maelstrom, Dec 20, 2014.

  1. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Yes, I will ask my regular plater to do that but if they don't I am not concerned. Just waiting on a couple of small things for the head and the top end will be going on and engine in.
     
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  2. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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    It's got no moving contact with metal so won't gall and the anodised surface will be slightly oleophilic which is good for lubrication reducing wear

    I'm not seeing any downside, the proof will be in the pudding
     
  3. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Sump on.
    With a new oil pressure release valve o-ring and gasket of course.
    S__3809282.jpg S__3809284.jpg
    This sump gasket is a piece of junk that I bought off eBay a long time ago. I then bought an OEM one which has a 0.5mm thickness versus this piece of rubbish is almost 1.2mm. Always use the thinnest gasket that works and grease before fitting. The gasket I used is from a YZF 600 (4TV-13414-00) but fits perfectly.
     
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    Last edited: Nov 20, 2020
  4. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    Slow going on the valve job. Quite a few ugly inlet valves. A light polish on the combustion chamber to give the carbon less to stick to. I also ground off the '3TJ' lettering on the valves. Before & after images:
    ComCh_01.jpg


    ComCh_02.jpg
     
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    Last edited: Nov 22, 2020

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