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Thread: ESE's works engine tuner

  1. #32221
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    12th March 2010 - 16:56
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    Quote Originally Posted by jasonu View Post
    I think the bike you are referring to was called The Rat.
    yes the rat bike😆

  2. #32222
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    Quote Originally Posted by husaberg View Post
    What video engine was i watching what i seen looked like an opposed twin?
    Early lightweight cycle-car powered by opposed twin.....
    .

  3. #32223
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    Quote Originally Posted by Pursang View Post
    Early lightweight cycle-car powered by opposed twin.....
    .
    Nice------

  4. #32224
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    20th January 2010 - 14:41
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    Quote Originally Posted by Pursang View Post
    Early lightweight cycle-car powered by opposed twin.....
    .

    Quote Originally Posted by Flettner View Post
    Nice------
    Oh i see now the Chinese are doing Siamese exhausts as well



    Kinky is using a feather. Perverted is using the whole chicken

  5. #32225
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    7th October 2015 - 07:49
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    Quote Originally Posted by husaberg View Post
    Use a Vt250 gearbox nice ratios strong gears quite narrow, millions made available from any wrecker in any country. nice clutch, available in 5 or 6 speeds as well. also the same gearbox is used on the MVX250 an fthe CBR250
    they have an intersting gearshift set up though almost planetary. available either push or pull left or right clutch.

    Attachment 342385Attachment 342386
    Interesting article about VT250 Turbo version 53Hp and racing NR 250 oval, but looks like on the illustration some mistake about NR power, maybe it could be 103 hp 18000rpm., not 53hp, like on the street version.

    https://japan.young-machine.com/2018/10/14/10926/

  6. #32226
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    Quote Originally Posted by katinas View Post
    Interesting article about VT250 Turbo version 53Hp and racing NR 250 oval, but looks like on the illustration some mistake about NR power, maybe it could be 103 hp 18000rpm., not 53hp, like on the street version.

    https://japan.young-machine.com/2018/10/14/10926/
    Cheers i think this was where i first seen about it.
    https://cx500forum.com/forum/cx500-c...her-turbo.html



    Kinky is using a feather. Perverted is using the whole chicken

  7. #32227
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    Want to say thanks again to this forum.
    Boy show good result in today s MX65 World Cup qualification, with rounded piston in 4th place.
    Most modification on the engine was from this Kiwi thread.
    Thanks
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  8. #32228
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    Quote Originally Posted by katinas View Post
    Want to say thanks again to this forum.
    Boy show good result in today s MX65 World Cup qualification, with rounded piston in 4th place.
    Most modification on the engine was from this Kiwi thread.
    Thanks
    Thank you for the feedback Katinas .

  9. #32229
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    Quote Originally Posted by katinas View Post
    Boy show good result in today s MX65 World Cup qualification, with rounded piston in 4th place.
    ............. Brilliant....


  10. #32230
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    Click image for larger version. 

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    Very satisfying to see Blair on Team ESE's GP-NSR110 being total dominant in the prelim race and taking out a at Hampton Downs today.

    DNF'd later with a massive slide into the kitty litter.


  11. #32231
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    Looks a little wet there Rob
    I've been told. Dreaming`s free.
    Think I'll go, back to sleep.
    Everybody listen, voices in my head
    Everybody listen, do yours say, what mine says?

  12. #32232
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    Quote Originally Posted by F5 Dave View Post
    Looks a little wet there Rob
    Yep, raining cats and dogs at one point.


  13. #32233
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    Sunday warm up 6th place, but race with little drama.

    After first fall in race 1, boy cant start up engine too quickly and ended in 39th place.
    In race 2, after two falls, finished in 9th place.
    Nice experience and Italian fans was amazing.
    After two weeks time, final all European MX65 championship round.

    Just want to say that after dyno tests we stick to std KTM exhaust pipe and std reed cage.
    We tested HGS pipe and V force reed block, but both work in the same way.
    Max power was same like with std.
    Over revs with little higher power.
    But too much lost at mid range.
    Maybe with rounded piston ( 1mm and knife sharp at C ), HGS exhaust tailpipe is too small, but we didnt test HGS with std piston.

    We tried rounded piston (with other mod) on other three racers KTM engines, ( two 50, one 65, one 125) and they all were very happy. One
    SX65 engine goes to Ireland championship and after the first race was surprises how it goes so well with std pipe.
    I decide to try this on my sons Yamaha Why scooter, with intention not to change any original parts. Just modified head, rounded std piston, wider than crankcase intake to C on cast iron cylinder ( aprox 1.5 mm step on crankcase ) std exhaust and speed goes up from 60 to 75 kmh with much stronger acceleration.

    Thanks again Frits about this idea and many others about nice two stroke things.

  14. #32234
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    My pleasure Katinas .

  15. #32235
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    8th February 2007 - 20:42
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    Katinas - with 1mm radius how much did you drop the cylinder , and with no radius on the boost where does its timing end up
    compared to previously.
    I have tested 0.75 and 1,5 radius with lowering the cylinder 1/2 the radius.
    But have not tested the uncut boost port idea - want to copy what you have found to work already.
    Ive got a thing thats unique and new.To prove it I'll have the last laugh on you.Cause instead of one head I got two.And you know two heads are better than one.

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