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Thread: One for Stewwie.

  1. #21
    Junior Member davedunsboro's Avatar
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    Jan 2016
    Location
    Dunsnorough SW of West OZ
    Posts
    25
    Davy , don't know if this is any help to you ?
    But I have in my possession for a few years & never likely to use
    A 90mm barrel & piston in reasonable nick (painted black)
    Got it in a SR500 deal when I bought a guy outright over here in the west
    Don't think its been even used , but I've been wrong before heh heh
    Unsure of the make of the piston
    Let me know if its of any use & I'll shoot up some pics
    Cheers Dave

  2. #22
    Thanks Dave, PM sent.
    Adding power makes you faster in the straights.... adding lightness makes you faster everywhere: Colin Chapman

    There is a quintessential elegance to riding a single cylinder machine: OCR

  3. #23
    Quote Originally Posted by stewross View Post
    Stew,

    I called the Qld mob but they only have the top two rings and have to order them from the states from a dealer and the cost is astronomical and I still have to source the oil ring.
    I'll probably end up just buying a new piston with rings.
    Pity as my piston is unmarked.


    I just sent an email to Deves Rings in the states to see if they can help as I have their rings in the old Daytona and they are superb, especially the oil rings

    davy
    Last edited by Old Cafe Racer; 06-19-2017 at 03:19 AM.
    Adding power makes you faster in the straights.... adding lightness makes you faster everywhere: Colin Chapman

    There is a quintessential elegance to riding a single cylinder machine: OCR

  4. #24
    I would have thought that J&E in the US would sell ring sets...E-mail them.

    I buy ring sets for the Wisecos from SERCO in Brisbane so I'd reckon they'd be available from J&E too.

    Postage would be OK on a ring set from the US.

    https://www.jepistons.com/Catalogs/P...xt-sr_500.aspx

    SR
    Last edited by stewross; 06-19-2017 at 03:54 AM.
    ...'Any unnecessary items on the bike, that it doesn't really need, shouldn't be there!'. (Café racers creed). SR..

  5. #25
    Quote Originally Posted by stewross View Post
    I would have thought that J&E in the US would sell ring sets...E-mail them.

    I buy ring sets for the Wisecos from SERCO in Brisbane so I'd reckon they'd be available from J&E too.

    Postage would be OK on a ring set from the US.

    https://www.jepistons.com/Catalogs/P...xt-sr_500.aspx

    SR
    Stew, I've checked the JE website but no match with these rings on a ring set, only individual rings but they are out of stock till October on one of the rings.
    I might give Serco a bell tomorrow as I do buy valves, guides and springs from them for the Triumph and they are good to deal with.
    Wouldn't be surprised if the Wiseco rings fit the JE piston.

    davy
    Adding power makes you faster in the straights.... adding lightness makes you faster everywhere: Colin Chapman

    There is a quintessential elegance to riding a single cylinder machine: OCR

  6. #26
    Good luck with it all...in one way it might be worth buying another piston and keeping that one as a spare...you could use the rings and buy the rings from the US for the new one over time...?

    SR
    ...'Any unnecessary items on the bike, that it doesn't really need, shouldn't be there!'. (Café racers creed). SR..

  7. #27
    Thanks Stew.

    Serco couldn't help and the Wiseco piston rings have a different radial depth....however I got lucky and found this mob here in Oz who do supply ring kits for my 90mm AE piston, via my local shop I had them in 24 hours (2 sets)
    This is the piston I have: https://www.jepistons.com/Products/130798.aspx and this is the ring kit: #02.JE-XC9000 for future reference.

    I've just completed the 3 thru bolt mod to the barrel and the case is being repaired in Brisbane by a specialist welder so maybe next week I'll have all the parts together again.
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    Adding power makes you faster in the straights.... adding lightness makes you faster everywhere: Colin Chapman

    There is a quintessential elegance to riding a single cylinder machine: OCR

  8. #28
    I had to make a long shank 6mm drill bit as I didn't have a jobber drill here and I made a simple drill die, guide from an M10 x 1.25 high tensile bolt drilled thru and cut to size which worked just fine.
    I turned 90mm long high tensile allen bolts down under the heads at 45 degrees to suit the countersunk holes in the base flange.and cut the threads longer so they screwed into the head studs to the right engagement.
    Picture also attached of the 3rd thru stud next to the spark plug.
    So with any luck this motor might have a chance iof staying together now.

    Question; I don't run a base gasket on the Old Daytona and my Ducati has steel shims between the barrel and crankcase to set the squish so do you reckon it will add rigidity if I build this motor metal to metal with no base gasket, just 3 bond?
    The base gasket is only 22 thou thick so I can't see an issue with compression or valve clearance I cant resolve there.
    Also any problem ditching the long alloy barrel base nuts and substituting high tensile M10 steel nuts there?
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    Adding power makes you faster in the straights.... adding lightness makes you faster everywhere: Colin Chapman

    There is a quintessential elegance to riding a single cylinder machine: OCR

  9. #29
    Which base gaskets do you use...the later Yam ones are metal composite and very good.

    No, there used to be kits available that provided high tensile steel replacements. So all good.

    SR
    ...'Any unnecessary items on the bike, that it doesn't really need, shouldn't be there!'. (Café racers creed). SR..

  10. #30
    I have a klingerite base gasket from Kedo.
    Just thinking something more solid there wouldn't hurt rigidity.
    Yes I'm more comfortable with hi tensile steel base nuts.
    Just wondering why the originals are alloy and so long when they could just have used std steel ones.
    Last edited by Old Cafe Racer; 07-07-2017 at 04:00 AM.
    Adding power makes you faster in the straights.... adding lightness makes you faster everywhere: Colin Chapman

    There is a quintessential elegance to riding a single cylinder machine: OCR

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