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Thread: New two stroke Aprilia to follow?

  1. #16
    apriliaforum Junkie
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    Aprilia / Piaggio should launch a new 50cc 2t FI scooter based on this innovation.
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  2. #17
    apriliaforum expert K-Style's Avatar
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    Quote Originally Posted by Ärräksä View Post
    Aprilia / Piaggio should launch a new 50cc 2t FI scooter based on this innovation.
    I always thought the problem was that while it worked on the Aprilia 50cc scooters it didn't work on bigger motors - at least until now. A new RS250 would be neat though.

  3. #18
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    I'd like to see that engine design in a 250/300cc version, especially as a V twin. Perhaps it could be stuffed in my '09 RS125. Big elevation changes would be no problem. R3~

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  4. #19
    Honest always, feared often Micah / AF1 Racing's Avatar
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    The bigger the cylinders and really the longer the stroke/transfer-open period there is the better this or any for of mostly homogeneous efi is going to work. DFI or GDI works well in cars because there is a lot of physical time between the injection event (starts as exhaust valves close) and has all the time of the intake stroke and compression stroke to atomize the fuel charge. KTM has already had to go to dual injector strategy most likely alternating between T1 ports to minimize injector duty cycle in what is likely only a 10k rpm motor, but that is two stroke 10k, equal to 20k rpm in a 4T.

    What I would love to see is a 500-600cc 90 degree twin crank V-Twin version...this would have serious advantages in a street/track package.
    Diminished expectations is the key to happiness in life.

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  5. #20
    apriliaforum newb Tripledij's Avatar
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    Go to 8:45 in this video to see a 2 stroke. Anyone know what this is? Looks like a 2 stroke DD

    https://www.youtube.com/watch?v=wZ2BTGo2Tmc
    Mike

  6. #21
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  7. #22
    apriliaforum newb Tripledij's Avatar
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    Bummer, too bad it wasn't a 350. Thanks for posting that.
    Mike

  8. #23
    Honest always, feared often Micah / AF1 Racing's Avatar
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    It's too bad Aprilia quit bringing the 50cc two strokes here, they actually sold pretty well, a lot of people bought them for novelty factor alone, they were way fun on go kart tracks too!
    Diminished expectations is the key to happiness in life.

    Micah Shoemaker
    AF1 Racing
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  9. #24
    apriliaforum expert Rj_666's Avatar
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    Amen - I have three RS50s, and I LOVE 'em !!

  10. #25
    apriliaforum expert RossGuzzi's Avatar
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    Quote Originally Posted by Micah / AF1 Racing View Post
    The bigger the cylinders and really the longer the stroke/transfer-open period there is the better this or any for of mostly homogeneous efi is going to work. DFI or GDI works well in cars because there is a lot of physical time between the injection event (starts as exhaust valves close) and has all the time of the intake stroke and compression stroke to atomize the fuel charge. KTM has already had to go to dual injector strategy most likely alternating between T1 ports to minimize injector duty cycle in what is likely only a 10k rpm motor, but that is two stroke 10k, equal to 20k rpm in a 4T.

    What I would love to see is a 500-600cc 90 degree twin crank V-Twin version...this would have serious advantages in a street/track package.
    I have long thought that a v twin 2 smoke of 5-600 cc would be awesome. I mentioned it a few times in another forum I haunt (Advrider) as loads of people want a powerful duel sport adventure bike with far less weight than what is offered.
    I guess one down side is how big the expansion chambers would have to be.
    Tuono Racing + KTM 990 Adventure =

  11. #26
    Honest always, feared often Micah / AF1 Racing's Avatar
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    At large displacements "resonant chambers" are not really needed in the conventional sense, the exhaust would still be pretty specialized but a 2:1 option going into catalyzer then muffler could provide arrow straight power delivery and flat torque curve, missing would be the exciting hit of "coming on the pipe" or resonant supercharging.
    Diminished expectations is the key to happiness in life.

    Micah Shoemaker
    AF1 Racing
    9900 IH35N
    Austin, TX 78753
    micah@af1racing.com
    @ShoemakerMicah
    @AF1Racingaustin

  12. #27
    apriliaforum Junkie
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    Lets see what the next EICMA has to offer. November 9.-12. Don think they will show anything at Tokyo Motor Show (starting at october 27.).
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  13. #28
    Honest always, feared often Micah / AF1 Racing's Avatar
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    If you know something I should, please feel free to PM me, will not share if not supposed to. I know of nothing new or groundbreaking upcoming?
    Diminished expectations is the key to happiness in life.

    Micah Shoemaker
    AF1 Racing
    9900 IH35N
    Austin, TX 78753
    micah@af1racing.com
    @ShoemakerMicah
    @AF1Racingaustin

  14. #29
    apriliaforum expert 2nd Childhood's Avatar
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    Anyone know much about this outfit?

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  15. #30
    Honest always, feared often Micah / AF1 Racing's Avatar
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    I tried but could not find any information of substance. As many times as I have said that if I had lotto bucks I would be balls-deep in two stroke R&D I do wonder how far a go-fund-me or kickstarter campaign might get.
    Diminished expectations is the key to happiness in life.

    Micah Shoemaker
    AF1 Racing
    9900 IH35N
    Austin, TX 78753
    micah@af1racing.com
    @ShoemakerMicah
    @AF1Racingaustin

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