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    TZ250.com...

    TZ250.com
    http://www.tz250.com/forums/showthread.php?6141-How-Many-3YLs-were-Made/page14
    9/25/16

    1RK - 000002 / 000215
    2KM - 000470
    3AK - 000152 / 000573
    3LC - 000231 / 000728 (manual...
  2. Thread: gear oil

    by TZmb
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    gear oil

    With Motul Gear 300 oil apparently no longer available, what gear oil do you recommend?
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    re-sleeving cylinders

    Does anyone (among the few who still visit here) have any experience with re-sleeving cylinders? We see an ad in a recent Classic Racer magazine from Fahron Engineering that offers "re-sleeving" but...
  4. Thread: NATS down?

    by TZmb
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    I am sorry to report the demise of the NATS...

    I am sorry to report the demise of the NATS forum. Thanks to Bob's referral above, Don did reply to my enquiry and confirmed that NATS is fatally damaged and will not resume. This only adds to my...
  5. Thread: NATS down?

    by TZmb
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    NATS down?

    Is the North American Two-Strokes forum (http://www.natsforum.net/) down? The last post I can see was April 8th and I get only computer jibberish when I try to log in. Is there a problem with Tee...
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    base gasket suppliers

    Among our several sets of cylinders we occasionally need 0.4mm base gaskets. We used to get these from Gasket Guru in the UK but now find his business winding down. The question is, can anyone refer...
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    You may want to check with Walter Degener. He has...

    You may want to check with Walter Degener. He has had one of the 3rd/4th gears replicated but I can't remember if it was the pinion or wheel- flydeg@yahoo.it
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    AHRMA Barber 2021

    Great field of 21 entries and 18 starters at Barber this year; a bit long-winded report of an eventful weekend-
    We knew engine #1 in the Â’93 was not ready to go with a suspected air leak at the...
  9. Thread: oil in exhaust

    by TZmb
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    Thank you; makes sense. Would that oil leakage...

    Thank you; makes sense. Would that oil leakage have contributed to the seizure of that cylinder? ...oil and air --> dangerously lean?
  10. Thread: oil in exhaust

    by TZmb
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    oil in exhaust

    Okay, we seized the right/lower cylinder on the first up-hill pull on the first break-in lap after 3 successful heat cycles. While I replaced the cylinder and piston and the pipe hung in the shop a...
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    We have had a wonderful time campaigning our pair...

    We have had a wonderful time campaigning our pair of 4DP bikes in the Open 2-Stroke class with AHRMA traveling to 7 events in 4 of the last 5 years. We even made 4 events in 2020. We typically see...
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    You may want to check with Walter Degener,...

    You may want to check with Walter Degener, flydeg@yahoo.it. He has many replica parts.
    Also, Francesco Bignardi, franzbz.323@gmail.com. He has had many power valves parts reproduced.
  13. Thread: TZ 350 Manual.

    by TZmb
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    If not already, try North American Two Strokes- ...

    If not already, try North American Two Strokes-
    http://www.natsforum.net/
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    nice Open 2-Stroke field

    There are at least 23 pre-entries in AHRMA Open 2-Stroke this weekend at Laguna Seca including long-time TZ250.com contributor Vince Rollieri. There is also a small purse on offer.
    ...
  15. Thread: leaded heads

    by TZmb
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    Progress. We sent our unleaded heads to Jeff...

    Progress. We sent our unleaded heads to Jeff Henise in San Francisco with a Roland Cushway modified unleaded head that we have used successfully. Roland had reduced the volume of a set of unleaded...
  16. Thread: leaded heads

    by TZmb
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    Thank you for the response. We are in the process...

    Thank you for the response. We are in the process of specifying exactly what we want to make out of our several sets. We will end up with 4 matched sets of the same volume produced relatively...
  17. Thread: leaded heads

    by TZmb
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    leaded heads

    After melting part of a piston onto one of our heads it is time to take an inventory of the TZ heads that we have accumulated over the years. I was surprised to find that we have 14 sets of heads. At...
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    egt and temperature gauges

    We campaign 2 4DP's with AHRMA where we have done about 7 events each of the previous 6 years and managed 4 this goofy season.
    On each bike we have had Westech dual egt gauges that use hose clamp...
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    We have both a '92 and a '93 4DP bikes. The tanks...

    We have both a '92 and a '93 4DP bikes. The tanks are a bit different and take different damper blocks. We discovered this the hard way when we swapped tanks and spent one weekend with the tank...
  20. Thread: engine #3

    by TZmb
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    engine #3

    So, with our season interrupted abruptly after our one outing to Roebling in February, I looked around the shop and realized that we had "most" of what we needed to create engine #3 from our...
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    Here is the youtube link to video of Mark hanging...

    Here is the youtube link to video of Mark hanging with Greg on Saturday- https://www.youtube.com/watch?v=D275FCqi6vI
    Greg could not catch Mark on Sunday.
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    Last year we saw a couple of reverse cylinder...

    Last year we saw a couple of reverse cylinder bikes well ridden, several 3YL's, and reliably 2 or 3 5KE's though seldom all at once. Over the years we have beaten, and been beaten by, a particular...
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    Earlier this year we made it out to the AHRMA...

    Earlier this year we made it out to the AHRMA races at Roebling to start what we expected to be our 7th substantial season. There was a decent Open 2-Stroke field featuring several TZ's and at least...
  24. Thread: Chain Sliders

    by TZmb
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    Tony Edwards over at North American 2-Strokes has...

    Tony Edwards over at North American 2-Strokes has pointed out that 4TW/5KE sliders are available at St. Neot's in the UK-
    ...
  25. Thread: Chain Sliders

    by TZmb
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    Ricky, Yes we would buy one set hoping that it...

    Ricky,
    Yes we would buy one set hoping that it includes the swingarm pivot protector in addition to the pieces for the top and bottom of the swingarm.
    bootes1947@gmail.com
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