A misunderstanding not a gearing question

Discussion in 'General' started by Deoodles, Sep 27, 2018.

  1. kirrbby

    kirrbby Well-Known Member

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    So it's the splined washers that you are trying to buy..?

    They're ALL the same for our engines. You can use either or...both part numbers are correct.
     
  2. Deoodles

    Deoodles Active Member

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    That was my question. I don’t need any I just saw the use of 2 different washers in the diagram and wondered if 18 was different. Other diagrams for a 4 speed actually list 17 for 3 of them and 18 for the other location making me wonder if it was in fact not the same.
     
  3. wanrep

    wanrep Active Member

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    Both those part numbers are on Ebay. One is bigger diameter than the other. Doesn't look like they're a different thickness but it's hard to tell.
     
  4. Deoodles

    Deoodles Active Member

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    Thanks. I saw that. It’s pricy from Japan. It may buy peace of mind though
     
  5. kirrbby

    kirrbby Well-Known Member

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  6. kirrbby

    kirrbby Well-Known Member

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    I'm not sure which is what. The above fiche shows 3 different part #'s??
     
  7. Deoodles

    Deoodles Active Member

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    I took my secondary Shaft apart there is a difference between 17 and 18. Obviously they both fit the shaft but 18 has a larger diameter and it looks like it’s steel instead of brass. they are both 1.15mm thick. Still getting errors when adding pictures.

    I can see why the larger diameter washer is needed in that location the gear doesn’t fit the shaft so they use a bushing between the gear and the shaft. The larger diameter means the gear won’t slide off the bushing. Makes perfect sense if you could put it in your hands and see it
     
    #167 Deoodles, Dec 4, 2018
    Last edited: Dec 4, 2018
  8. Deoodles

    Deoodles Active Member

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    Stuff came in today. 54x69mm cyl and piston. 54mm stroker crank and ancillary parts to build my first 124cc motor. I will post that build in another thread I have for this bike. I’m really pumped to get started and see the results.
     
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  9. Roy Chambers

    Roy Chambers Member

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    Yes, That's why it's Bigger! It's made bigger to cover the bushing.
     
  10. racerx

    racerx Administrator
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    If this engine is similar to other 49cc-based horizontals, then you probably don't want to Loctite the cylinder studs. Once they've been torqued, they'll be tough to unscrew from the cases. If you're worried about the nuts becoming rusted to the threads, a little high-temp antiseize could be used, though I'd aim for the low end of the torque spec range if it's applied. If you ever want to R&R the rocker arms, without pulling the head, or get inside the cases without pulling the entire top end assembly, the case studs have to be removed first.

    I would use acorn nuts on all four corners...just like Honda began doing, in the 12v era. It's easy enough to find an M6 hex nut, or two, if you need a jamb nut setup to R&R a stud, or two.
     
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