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1965 Yamaha YDS3C Resto Project

Discussion in 'Your 250cc Projects' started by Scott Crawford, Oct 25, 2014.

  1. Scott Crawford

    Scott Crawford Member

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    I finally have some time to post a few more pics. Seems like I am constantly busy with this project but I'm not seeing results although I know I'm making progress.

    Got the fuel petcock taken apart and cleaned up nicely. It was pretty bad- just like the carbs.
    IMG_2186.jpg


    Here's a pic of the circlip I mentioned in a previous post. Not sure if I jacked it up or what. After cleaning the gears and shaft, I fit it all back together and the clip doesn't fit as snug as before I removed it.
    IMG_2263.jpg

    Rear shocks disassembled and struts cleaned. Look almost new but I think I'm going to need to change out the oil and check the piston seals.
    IMG_2290.jpg


    I've never taken one of these apart, so if you can give me some advice, I'd be grateful. There is a dimpled notch (circled in red) that I think is the key to finish taking this apart. I'm thinking I can punch the dimple outward and then unscrew the notched top plate. Thoughts?
    IMG_2291.jpg

    Another view of the strut and the dimple.
    IMG_2293.jpg


    Both exhaust pipes are about 90% excellent condition. Here is the not so good 10%. I'd like to hear your thoughts on what to do with this? I would really like to simply re-chrome the entire unit after cutting off the mating flange so I can remove the clamp nut. I need to find a local shop that does the chrome work. I have read on various forums that chrome shops are loathe to do ANY exhaust pipes that have been used. Supposedly fouls their vats. I have searched for a replacement online and have netted zip for my efforts. Maybe just clean it best that I can and keep my feelers out for a replacement pipe as I continue with the project. I'd like to hear your thoughts..
    IMG_2296.jpg


    Same as pic above. The metal is sound. The chrome is just gone.
    IMG_2297.jpg

    Here is the #2 jug. This is the area of pitting I mentioned in yesterday's post. Like I said, Im going to go with .025" over, initially. I'm thinking that will be enough. I will wait to buy the piston kits until after I determine how deep I needed to go.


    IMG_2301.jpg

    Another view of the pitting on #2.
    IMG_2302.jpg


    Here's a pic of the jet that I can't get out of the carb. I'm using the widest and thickest blade of screwdriver that will fit the slot. Between the brass being so soft and the jet being so darned stuck, you can see that the blade has been skipping and I haven't much to work with. Again, looking to hear your thoughts on this problem. EZ out?
    IMG_2306.jpg


    That's about all for now. Probably going to press the bearings out of the engine cases and get the crankshaft bearings and connecting rods disassembled tomorrow. As always, I appreciate your tips and comments. Best regards ~

    Scott
     
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    Last edited: Nov 8, 2014
  2. Murdo

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

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    Scott, give the circlip a squeeze in the vyse to make it a bit tighter on the shaft.
    The shock body is bent in to stop the nut undoing, so bend it out and undo the nut to remove. I made a tool from flat 1/8th steel bar to 'hook' into the small grooves to undo (one was very tight). I used 20wt hydraulic oil to refill them, used same quantity as came out.
    Shame about the rust in bore.
    Cannot help with the pipes, maybe some of that 'chrome' paint?
    Heat the carb body with hot air gun or similar before trying to remove the jet.
    Heating the engine cases also helps to remove the bearings.
     
  3. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    What about high temp powdercoating or ceramic for the headers?
     
  4. Scott Crawford

    Scott Crawford Member

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    @ Murdo- thank you for the tips. I will post the results. Glad I didn't attempt to remove the bearings today. great idea to heat the cases before removal. Also heating the carb. It's been soaking for over a week so hopefully a little heat may help that jet to cooperate.

    @ Grey- thanks. I will research this. I wasn't aware that you could powdercoat or ceramic a chrome color. That would certainly help.

    Appreciate the tips, Gents! Take care~

    Scott
     
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  5. Jo Verhelst

    Jo Verhelst Forty2 Contributing Member

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    i read in Classic Bike that the carb specialist use a watercooker to heat and clean the carbs, didn't try it myself yet but it might be helpfull?
     
  6. andy moulden

    andy moulden Member

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    picture of my yds3 circa 1973


    YDS3.JPG
     
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