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Type: Posts; User: gbowie

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  1. Replies
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    This chamber turned out pretty well..after...

    This chamber turned out pretty well..after removing the dents there were olly the tar rash marks left.. I pumped the chamber to 28 PSI.
    http://i65.photobucket.com/albums/h221/bowieg/IMG_0405.jpg...
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    NSC Electroplating here in South Africa did the...

    NSC Electroplating here in South Africa did the plating www.cylinders.co.za . They left it in a cleaning solution too long, didnt chage me ,but I lost a cylinder.
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    This is what your threads can look like if they...

    This is what your threads can look like if they stuff up a replate !! http://i65.photobucket.com/albums/h221/bowieg/IMG_3861.jpg http://www.tz250racing.com/iB_html/non-cgi/emoticons/mad.gif
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    Had the same problem, helicoil didnt work for...

    Had the same problem, helicoil didnt work for me... you have to use two per hole.
    I tapped out to M8 and used stailess capscrews, looks neat too.
    ...
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    PM sent, but no reply yet. Are the front discs...

    PM sent, but no reply yet.
    Are the front discs stamped with "For closed circuit use only" ? as the TZR road bike discs are almost identical.
  6. Replies
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    I use expandable rubber bungs to block off the...

    I use expandable rubber bungs to block off the end of the chamers..The type they use for recreational boat bilges, they come in all sizes. The pressure is very low.
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    Pressurise the camber to 3 to7 PSI. (depending on...

    Pressurise the camber to 3 to7 PSI. (depending on wall thickness) Use heat, play the torch around the edge of the dent in a circular motion and it will move out.
    Reduce the circles until you get to...
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    PM sent.

    PM sent.
  9. Replies
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    I see you are in Spain, the 1200 you are asking,...

    I see you are in Spain, the 1200 you are asking, would it be US$ or Euros ?
  10. Replies
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    I have a 3YL converted to 4DP and blew the...

    I have a 3YL converted to 4DP and blew the gearbox big time last weekend... the new parts will cost more than the bike is worth. How much are you asking ??
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    A Lear jet would do the trick...you live in an...

    A Lear jet would do the trick...you live in an unfortunate time zone, great 250 race today at 12 noon, beer and barbeque...
    Then again you score at Laguna Seca....
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    Thanks Vince, So by that I take it that the TZ...

    Thanks Vince,
    So by that I take it that the TZ has full floating rotors
    and that a " reasonable amount " of play is normal ??
    Geoff.
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    My TZ 250B rotors have a (measured) 3.1mm...

    My TZ 250B rotors have a (measured) 3.1mm sideways play at the rim and around 1-2mm radial play.
    I do have a couple of TZR 250 3XV bikes in my collection and the rotors appear identical in every...
  14. Thread: tz head layout

    by gbowie
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    Not sure on that, But someone else out here will...

    Not sure on that, But someone else out here will know.!
    I only measure the squish with solder on the inner bit.
  15. Thread: tz head layout

    by gbowie
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    4,456

    The TZ has a bevel ( Chamfer ) around the edge of...

    The TZ has a bevel ( Chamfer ) around the edge of the piston which appears to tie in with the outer squish band in the combustion chamber.

    ...
  16. Thread: Head blown off

    by gbowie
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    3,934

    You weren't supposed to see that green stuff. I...

    You weren't supposed to see that green stuff. I was using a track day for running in, so there was no formal scrutineering.
    Our rules are the same regarding glycol....
  17. Thread: Head blown off

    by gbowie
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    Vinny probably has the answer, I removed the head...

    Vinny probably has the answer, I removed the head today and the bolts had pulled the thread right out on 4 bolts, the head is now actually slightly bent.
    The cylinder was being run in after...
  18. Thread: Head blown off

    by gbowie
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    Somewhere in this forum, I read of a guy who...

    Somewhere in this forum, I read of a guy who found his cylnder head in his belly-pan..
    This happened to me today.. A loud bang, lost a cylinder and coolant pouring out....
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    Ok. Got the message....left myself wide open...

    Ok. Got the message....left myself wide open there.
    I now also replace the gudgeon ( wrist ) pin regularly after this !! Cost a a cylinder and complete crank rebuild, not to mention the head etc.
    ...
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    The hone marks are still visible on most of the...

    The hone marks are still visible on most of the cylinder, I guess I should inspect the pistons after every race and cut the replacement interval down..... changing pistons after only 3 race meetings...
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    This topic may end up saving me a lot of money....

    This topic may end up saving me a lot of money.
    I run 4DP-00 barrels graded "C" with 4DP-02-C pistons, and have had one major blow up with the skirt dropping off, and been lucky enough to find...
  22. Thread: dyno runs

    by gbowie
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    Dale, maybe you could help by explaining some of...

    Dale, maybe you could help by explaining some of your American expressions.. I know about Squish band and squish clearance, but an expression that increasingly crops up is " Deck Height" which going...
  23. Thread: powerjet jets

    by gbowie
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    I will send you some info tomorrow, Jools !...

    I will send you some info tomorrow, Jools ! http://www.tz250racing.com/iB_html/non-cgi/emoticons/biggrin.gif
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    Was that perhaps a ZX 6 you were doing battle...

    Was that perhaps a ZX 6 you were doing battle with ? If so you didn't shame yourself !!
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    Thanks for the info guys, Unable to test the bike...

    Thanks for the info guys, Unable to test the bike until the next race 16/17 June...Dale, on checking the plug caps I found the bike fitted with shortened Bougicord supressor cables and caps off a...
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