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Cam shaft question for the gurus

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  • #16
    We got the head back on, cams in, and the chain back on. What a PITA that was. The darn thing was stretched almost to it's limits and wouldn't grab the lower sprocket until I put the tensioner back on. I kept thinking it was off to one side of the lower sprocket, but I finally just looked down there with my boroscope and the problem became instantly clear - man I love that tool . I checked the clearances, and only the #4 exhaust was in spec. Most of them had to be adjusted by 2 shim sizes. That just blew my mind - QRFan spent $2400 bucks with this cork soaker, and he didn't even adjust the valves! Anyway, I ran a compression test on a stone cold motor - no carbs, no exhaust - and here's the numbers - #1 - 120, #2 - 120, #3 - 115, #4 - 120. This thing just had a ring job, and the hatch marks are still visible, so the numbers should go up when they're fully seated. I'll run the compression test again when I get the exhaust and carbs mounted, and get it running, so I can do the warm dry and wet tests.
    I think I have a loose screw behind the handlebars.

    '79 XS11 Standard, Jardine 4/1, Dyna DC1-1 Coils, 145 mains, 45 pilots, plastic floats - 25.7mm, XV920 fuel valves, inline fuel filters, speed bleeders, Mikes XS pods, spade-type fuse block, fork brace, progressive fork springs/shocks, manual petcocks, 750 FD, Venture cam chain tensioner, SS brake lines

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    • #17
      How do you like my solution to keep the buckets and shims in place for the gas test (which it passed with flying colors)?

      I think I have a loose screw behind the handlebars.

      '79 XS11 Standard, Jardine 4/1, Dyna DC1-1 Coils, 145 mains, 45 pilots, plastic floats - 25.7mm, XV920 fuel valves, inline fuel filters, speed bleeders, Mikes XS pods, spade-type fuse block, fork brace, progressive fork springs/shocks, manual petcocks, 750 FD, Venture cam chain tensioner, SS brake lines

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