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R* 1700 2005 Plane bearings

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  • R* 1700 2005 Plane bearings

    Hello
    I need a "little help from my friends"...
    On RonAyers page I see four different options for plane bearings position 8 https://www.ronayers.com/.../50045310f8.../crankshaft-piston
    Could You explain me which one I should choose ? And what is the difference?
    "Different thicknesses I would think to take up machined tolerances" I understand this but I really don't know which one I should use for my engine. How to connect dimensions bearings and crankshaft. I don't see any marks/signs on bearings.
    The front cylinder works much harder than the rear one, after disassembly it turned out that the plane bearings were worn out I need to replace it

    Thanks on advance.
    Reg.
    rds
    Tom

  • #2
    Man I didn't know WHAT a plane bearing was, maybe something for a Cessna?
    Hopefully someone has your answer..
    With enough beer you can do anything...D.Pate

    Comment


    • #3
      from Solon, IA

      You may have to be patient on this one. For the most part these bikes are long running with little beyond standard maintenance. Not many guys go this deep into these motors. So have to wait for a few of our more knowledgeable experts here to see this post.

      I've always simply called these rod bearings. Not sure where Yamaha comes up with plane bearings. Maybe someone will enlighten on that as well.

      Comment


      • DEEPHATE
        DEEPHATE commented
        Editing a comment
        Yes that's more common nomenclature!

      • Bikerron
        Bikerron commented
        Editing a comment
        The operative word is ‘plain’ as in, not fancy, such as a roller or ball bearing.

        These manuals were written by people that don’t use proof readers.

        Planes have wings.

    • #4
      Tom, Looking at the part numbers I would guess blue is standard, black is .010 under and brown is .020 under and so on. Check with a dealer.

      Comment


      • #5
        Tom, I just checked my service manual and it gave a formula for finding the correct big end bearings or plane bearings. It says there should be a number stamped on the web of the crankshaft, there should also be one stamped on the connecting rod at the parting line. Take the number on the rod and subtract the number on the crank and this should give you the number of the bearing needed. blue-1 black-2 brown-3 green-4 yellow-5. If you are into the engine this far and you do not have a service manual you can find downloadable or paper ones online. They give you clearance and torque specs. Good luck

        Comment


        • Tom_WSR
          Tom_WSR commented
          Editing a comment
          thank's for me it's very clear now - regards
          Tom

      • #6
        Just curious how many miles on the bike and were the bearings worn down to a copper color? Also what was the original reason for the engine teardown? It is not at all a common thing needed even in bikes in excess of 100,000 miles

        Comment


        • Tom_WSR
          Tom_WSR commented
          Editing a comment
          it is in fact 100 k miles... thing are broke.. I willl fix and enjoy the ride - thats all

      • #7
        here is a short video on how to use Plastigauge to determine bearing clearance.IMO the best way to determine bearing size is to mic the crank journals and compare your results to the specs in the manual. those results will determine what bearing is needed. If you don't have the proper mics just bring the crank to any machine shop along with the specs from the manual and they will tell you what size bearings to use.
        https://youtu.be/q3pHb-qXZc8

        Comment


        • #8
          davej, I am curious after reading the manual it sounds like there are several crank pin and rod journal dimensions possible. I know you have been through yours with the bore kit . Am I reading the manual correctly and there are multiple sizes of crank pins and rod journals?

          Comment


          • davej
            davej commented
            Editing a comment
            I was unaware of that. No need to split case for the Big Bore

        • #9
          Tom, Are you already torn down to the crank? If so do you see a number stamped on the crank web and the connecting rod? I have never run across an engine that had this type of procedure for bearing selection. The manual shows the crank marked on the side of the throw or web and the rod marked on the parting line by the D stamp used for orientation. You have my curiosity peaked.

          Comment


          • #10
            Originally posted by Tom_WSR View Post
            Hello
            I need a "little help from my friends"...
            On RonAyers page I see four different options for plane bearings position 8 https://www.ronayers.com/.../50045310f8.../crankshaft-piston
            Could You explain me which one I should choose ? And what is the difference?
            "Different thicknesses I would think to take up machined tolerances" I understand this but I really don't know which one I should use for my engine. How to connect dimensions bearings and crankshaft. I don't see any marks/signs on bearings.
            The front cylinder works much harder than the rear one, after disassembly it turned out that the plane bearings were worn out I need to replace it

            Thanks on advance.
            Reg.
            rds
            Tom
            Who told you or why do you think the front cylinder works harder than the rear? No truth to that at all. Both cylinders on a proper running engine work the same. they are both on the same crank , they both have the same fuel/air supply, timing and the same everything else..

            Comment


            • Tom_WSR
              Tom_WSR commented
              Editing a comment
              yesterday I opened engine and I feel difference between front and rear cylinders... so question was about marks, dimensions, descripion on the parts - I can understand in You experience this things are not happend...
              for the moment I ordered bearing ... so in the few weeks I should give You movie with nice soud of V-engine after fixing problems
              regards

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