Michael

  • Hi Doctorot,

    thank you for your interest in the engine tuning.

    Well, let me sort some of your questions:

    The major frame mod at the “Vienna” is to cut the rear frame off and also the rear cross-tube out of the frame. The cross-tube was in the place where the silencer is now. To gain stability of the frame again, I’ve welded angled cross-tube…[Read more]

  • Hi Doctorot,

    welcome back and congrats to your very nice Twin !

    I am sure it is a lot of fun in the mountains with it 😉

    Cheers, Michael

    PS: In regards to engine tuning I can support you with some information. On our german Z750Twin community website there is a portrait of a Twin I’ve bought just last week !
    Manfred built it and there is a lot…[Read more]

  • My son Nils welded two major parts of the exhaust system 😉

    Still a lot of work to do, but it is fun !

    Cheers, Michael

  • Hi Lonesome Twins,

    the stainless steel exhaust headers arrived and it is hard to cut half of them away. That is needed to find the right angle to the collector. Only three parts of the exhaust are missing now and a special exhaust part that separates the collected exhaust gases to the two mufflers is ordered in UK !

    Looks good to weld the…[Read more]

  • Hi guys,

    I will get a new fuel cap welded into this tank, so don’t need the mentioned cap anymore.

    Got a pair of chinese KOSO PWK 34mm flat slide carbs and larger intake boots to mount them. Fits quite well and I will see if this small engine will take “food” from these large carbs 😉

    Still a lot to do 😉

    BTW: These two carbs weight is 900…[Read more]

  • Well, little progress made. This bike gets upswept exhausts as well as the “Vienna” has it.

    Looking for a rare fuel cap of this tank:
    <p style=”font-weight: 400;”>Kawasaki KZ400-B1 KZ400-C1 KZ400-B2</p>
    <p style=”font-weight: 400;”>KZ440-B1 KZ440-B2 KZ650 KZ650-D1</p>
    <p style=”font-weight: 400;”>KZ650-D1A KZ650-D2 KZ650-E1</p>
    <p…[Read more]

  • Michael posted a new activity comment 1 month, 1 week ago

    Hi Andy,
    I’ve found this in the B manual. No idea what the # sign means in this combination.
    Numbers are for standard rims 1.85×19 front, 2.15Bx18 rear
    front left and right, inner
    #8 x #9 x 184,5 x 97°

    front left and right, outer
    #8 x #9 x 184,0 x 83,5°

    rear left inner
    #8 x #9 x 144,0 x 100,5°

    rear right inner
    #8 x #9 x 167,5 x 83°

    r…[Read more]

  • Hi Lonesome Twins,

    as the GPZ305 ended her race career after just one track event
    http://www.lonesometwin.com/forums/topic/michaels-gpz-ex-305-rebuilt-to-race/#post-25241
    I had to look after a replacement in the class below 55HP 😉
    It will not replace my “Vienna”, the Z750Twin race bike.

    I’ve found a massive modified Z440 and some of the mods…[Read more]

  • Hi Colin,

    welcome to the Lonesome Twins and thank you for your introduction.

    Looking forward to see pics of your Twin.

    Best regards, Michael

  • Hi Ed,

    there is Peter in Germany who is making down tubes from stainless steel.
    They can have different angles and diameters at the rear end to match your desired silencers.
    They do not have an interference/connector tube from left to right.

    Let me know if you are interested.

    An unpolished pair is around 280,- Euros, a polished pair is around…[Read more]

  • Hi Bob,

    even if there where only a few bikers and bikes, there were very nice people and bikes.

    Well done !

  • Well, I didn’t manage to fit the tuning engine into my racetwin by now, so I will do it this winter.
    Had the last track days last week and besides the GPZ 305 I rode my “Vienna”:


    Me on Kawa Z750Twin, #676 and my son Nils on Suzi SV650S, #650


    I’m behind my son, ready to overtake him and the driver in front of him at the inside 😉


    battling a…[Read more]

  • Hi Lonesome Twins,

    I had some fun on the track with this little GPZ. The girlfriend of my son loves this bike and she wants to make her bike driving license until spring 2020. So this will be her first bike and we will modify it to be roadlegal again.

    Here some pics:


    My son following me on a Suzuki SV650S

    so much fun


    full brake after…[Read more]

  • Hi Lonesome Twins,
    as I can’t start a thread in any other forum I do it here 😉
    Sure some of you know me and I’ve introduced some of my Z750Twins already.

    This time I just want to show you what I’ve did in the past two months.
    A friend of mine wanted to modify a 1983 GPZ305, also known as EX305.
    He lost the momentum and wanted to get rid of it,…[Read more]

  • Hi Bob,

    nice little Kawasaki you have !

    I would like to attend the DGR, but that Sunday is the last day to prepare three bikes – to have fun on a racetrack the days after.

    Wishing you and the Gentlemen and Gentlewomen all over the world a great day and many/much (?) donation(s) for a good purpose !

    Cheers, Michael

  • Hi TJ,

    Glemseck 101 2019 is this weekend !

    I’ve answered your question in regards to the Ignitech on the german http://www.z750twin.de website 😉

    If you need individual downtubes in stainless steel, one of our german members, Peter (ausreiter) is producing them on individual basis. Price is very reasonable with around 200,- Euros (plus p&p) for…[Read more]

  • Michael posted a new activity comment 3 months, 2 weeks ago

    Hi Andy,
    as long as we speak about the B models with spoked wheels, the hubs are all the same.
    The LTDs and the CSRs have different hubs, e.g. drum brakes in the rear wheel.
    LTDs have 48 spokes instead of 40 spokes with the Bs.

    Have you seen the Tracker made by the Wrenchmonkees:

    Wrenchmonkees Kawasaki Z970

    Cheers, Michael

    • Hi Michael,yes it is a B model that’s great makes life a lot easier

    • Hi Andy,
      I’ve found this in the B manual. No idea what the # sign means in this combination.
      Numbers are for standard rims 1.85×19 front, 2.15Bx18 rear
      front left and right, inner
      #8 x #9 x 184,5 x 97°

      front left and right, outer
      #8 x #9 x 184,0 x 83,5°

      rear left inner
      #8 x #9 x 144,0 x 100,5°

      rear right inner
      #8 x #9 x 167,5 x 83°

      r…[Read more]

  • As I am working on an engine upgrade with 906 ccm and didn’t finished it since 5 years now, a lucky moment happened at the “Built not bought”. The seller of my big-bore-kit was present and offered me his engine with 906 ccm, a lot of modifications and at least 2000 km used on the road !

    Adjustable camshaft sprockets, EX-cam as IN-cam, larger…[Read more]

  • Hi Kon,

    thank you !

    I’ve startet just 1,5 years ago, ok, close to 2 years now, to race on a track. Most instances were training, only a few races until now.

    As an experienced motorbike rider I said, that I can find the ideal line on the track myself and will learn proper riding by watching and copying other riders. Both is wrong. I would highly…[Read more]

  • Hi Kon,

    I own several of the Z750Twins (Bs and LTDs), some other bikes (Z1100ST, FZR1000EXUP, Z750E, RD80LC1).
    My spouse has an LTD and just sold her YZF600R “Thundercat” and has a Suzuki SV650S as her second bike now.
    My 20 yo son is riding a KTM RC125 on the road and a special built Aprilia AF1 (ex 125ccm, 2 stroke) but with a 650ccm, 4-stroke…[Read more]

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