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Help Help with Yamaha YDS5

Discussion in 'Yamaha 250cc 2 Strokes' started by Yamaha YDS5, Oct 4, 2016.

  1. Yamaha YDS5

    Yamaha YDS5 Member

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    Couple of questions from a new member.
    1. I have a new set of pistons to fit. The rings are of two different appearances, I imagine one of them is the top ring, the other is the bottom ring. Two of the rings have a slightly lighter almost champherd edge. The other two are square. I can't figure out which is top and which is bottom. Anyone know? They are NOS Dixie manufactured from the 1970's which are good quality. Pistons are standard size.
    2. When I got the bike the wiring on the right hand side was disconnected that goes to the points etc. There is a fat green wire but I can't figure out where it goes. There is also a black earth, also can't work out where it connects. Can anyone please open their inspection cover and either tell me where they go or better still take a pic for me. Thanks to all who can help.
     
  2. risky

    risky risky

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    @Murdo ???????????????????????
     
  3. my67xr

    my67xr Bike Enthusiast Staff Member Premium Member Contributing Member

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    The square edge rings would be top (usually chromed) and the champhered/ tapered edge rings will be bottom.
    The wider side of the taper goes down.
    Is there any markings on them , they usually face up on the piston's
    @Murdo should be able to confirm this
     
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  4. risky

    risky risky

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    is the chamfer on the inside or outside?send me a pm with your phone number and i will get a person with a yds6 to ring you.
     
  5. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    The chamfered/chrome rings go to the top, with the black/cast ring below.
    Re the wire, risky has my book now so he may be able to look it up for you.
     
  6. risky

    risky risky

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    if the light coloured rings have the chamfer on the inside edge this faces up. as for wiering will have younger eyes look tmr.
     

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