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Thread: Project: Vespa 300 SUPER (should end up living up that name)

  1. #46
    Honest always, feared often Micah / AF1 Racing's Avatar
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    I love the orange color...loud!

    Here is a fuel pump from a Vespa and more specifically the fuel pressure regulator to show it up close.



    This is the pump cartridge complete:

    Diminished expectations is the key to happiness in life.

    Micah Shoemaker
    AF1 Racing
    9900 IH35N
    Austin, TX 78753
    micah@af1racing.com
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  2. #47
    apriliaforum expert jrflanne's Avatar
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    That orange is nice. Stock?
    Bikes:
    2007.5 Tuono-Black, with 1102cc's of micah's badness!
    2012 Griso-Silver and black, Agostini pipe, some carbon bits.
    2006 Vespa GT200-bitubo suspension all around, Malossi big-bore, head and cam, Akrapovic pipe, all put together by Micah.

    gone 2002 Caponord-Oyster gray (as faithful as a hound dog)
    gone Futura-Red (on the AF1 showroom floor. Get some.)

    The more I learn about people, the more I appreciate rocks.

  3. #48
    Honest always, feared often Micah / AF1 Racing's Avatar
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    Yep, that was indeed a stock color for the EU market, not sure if we got them here, awesome color scooter however! Since mine got crashed for me on Thursday by a no parking moron at the bank it is something to consider for me, different decals might be appropriate for mine however.
    Diminished expectations is the key to happiness in life.

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

  4. #49
    apriliaforum expert jrflanne's Avatar
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    That orange in matte would be kickin'!
    Bikes:
    2007.5 Tuono-Black, with 1102cc's of micah's badness!
    2012 Griso-Silver and black, Agostini pipe, some carbon bits.
    2006 Vespa GT200-bitubo suspension all around, Malossi big-bore, head and cam, Akrapovic pipe, all put together by Micah.

    gone 2002 Caponord-Oyster gray (as faithful as a hound dog)
    gone Futura-Red (on the AF1 showroom floor. Get some.)

    The more I learn about people, the more I appreciate rocks.

  5. #50
    apriliaforum expert scooterman's Avatar
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    Gentlemen....please advise on what would be the general consensus for a reliable power upgrade; drop the V4 head on a) the stock 250cc (244cc) jug, b) the stock 300cc (278cc) or c) the Malossi 268cc? Also, which combo/s, beside the stock 250cc, would require piston modification?
    Many thanks, RW


    '09 SC 250
    V4 Malossi Head & Cylinder (ported & polished ; j )
    203cc Injector (Scarabeo 500)
    Akrapovic slip-on
    12g sliders w/ stiff clutch & contrast springs
    Michelin Power Pure

  6. #51
    Honest always, feared often Micah / AF1 Racing's Avatar
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    If you have a 250cc do the full Malossi kit, bore and head and if you use the right piston even the cam! All bolt on stuff and all works very well.
    Diminished expectations is the key to happiness in life.

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

  7. #52
    apriliaforum expert scooterman's Avatar
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    Quote Originally Posted by Micah / AF1 Racing View Post
    If you have a 250cc do the full Malossi kit, bore and head and if you use the right piston even the cam! All bolt on stuff and all works very well.
    Thanks for the tips, Micah...I'm looking for that little extra boost through the canyons, sounds like that's the ticket ; j


    '09 SC 250
    V4 Malossi Head & Cylinder (ported & polished ; j )
    203cc Injector (Scarabeo 500)
    Akrapovic slip-on
    12g sliders w/ stiff clutch & contrast springs
    Michelin Power Pure

  8. #53
    Honest always, feared often Micah / AF1 Racing's Avatar
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    If by little you want an extra 30+% then it is a perfect parts list. I am going to try mine out using the stock pipe once my head arrives. I am using the stock 300 Piaggio cylinder, machining valve cutouts into the stock piston if required because I need to keep compression ratio low and also need the steel liner cylinder for maximum cylinder strength under boost, no reason to give it a weak spot and the stock 300 piston looks plenty strong to take the additional heat and pressure of a modified motor. The Malossi piston for use with the Malossi V4 head is a very nice part and will definitely bring higher compression which for a naturally aspirated street motor is exactly what you want.

    This is the fairly rare stock alloy cylinder with piston from Piaggio, it costs no more really than the iron cylinder replacement kit from Piaggio but you definitely save some weight, 6-8 lbs if memory is serving me at this pre Red Bull hour!



    While this is a dead stock, oem Piaggio item it is pretty uncommon, I would guess that 99% of the motors shipped to the USA used the iron cylinder...but if ever you have to replace your stock cylinder due to some unforeseen disaster remember this little jewel. The piston is EXACTLY the same whether you get the iron or alloy bore, dished, low compression to survive decades of WFO highway riding!



    For comparisons sake, here is the more common steel or iron cylinder as delivered stock.




    This pic compares the Malossinpiston for use with the stock cam (medium compression) with the stock piston!



    Now...to find the pic of the high comp piston for use with the 300 Super cam or the optional Malossi V4 race camshaft which is about the same spec wise as the stock 300 camshaft!




    Ready to run after removing ALL sharp edges! I did not end up using this piston but rather a stock one due to plans for eventual boost on my motor!

    Diminished expectations is the key to happiness in life.

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

  9. #54
    apriliaforum expert scooterman's Avatar
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    Yes, exactly, 30% up should be about right ...and I had planned to keep the stock exhaust and throttle body. My stock cylinder is steel and initially considered machining the stock piston but you've convinced me otherwise; as it stands I'm already starting to annoy the sportbike crowd by tailgating them through the twisties smoking a hand rolled. I'd like to really get under their skin by doing the same but uphill, assuring they'll never look at scooters the same way again ; j


    '09 SC 250
    V4 Malossi Head & Cylinder (ported & polished ; j )
    203cc Injector (Scarabeo 500)
    Akrapovic slip-on
    12g sliders w/ stiff clutch & contrast springs
    Michelin Power Pure

  10. #55
    Honest always, feared often Micah / AF1 Racing's Avatar
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    A wet shot of nitrous at 10bhp on the rich side should be able to really help on the straights...and god that would be fun if system was totally hidden! A pipe with a longer header like used on the PM Tuning or the little length trick Leo Vince uses to add header length are good for the Vespa motors....especially with the head replaced so the pipe becomes an actual restriction, on a stock motor you only gain about 1.5bhp from the Akro or Leo pipes, the bike I had in with the PM Tuning pipe ran so poorly due to a host of other owner installed mods it never saw the dyno...free rebuilds are not my thing.

    Anyone know the ideal header length for say 8-9k rpm?


    Meant to post this earlier...the as-delivered Malossi high comp/big cam piston with deep valve pockets and high crown.

    Diminished expectations is the key to happiness in life.

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

  11. #56
    apriliaforum expert scooterman's Avatar
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    LOL...Yes!, that's exactly what's needed for those uphill straights behind an R6, and totally hidden, it's brilliant.

    What about extending the header length with a shorty Akro slip on... just sayin'...


    '09 SC 250
    V4 Malossi Head & Cylinder (ported & polished ; j )
    203cc Injector (Scarabeo 500)
    Akrapovic slip-on
    12g sliders w/ stiff clutch & contrast springs
    Michelin Power Pure

  12. #57
    Honest always, feared often Micah / AF1 Racing's Avatar
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    I am guessing the reason Akro uses suck a large diameter tapered link pipe is to slow down exhaust velocity to "trick" the header into acting like it is longer, similar to the asymmetries used in the Ducati 999 exhaust when looking at the diameter of the rear header versus the front header. We need pipes that show benefit from 6-9.5k rpm, much lower in the rpm range than most sportbike motors...our header length needs to be somewhere between cruiser and sportbike lengths...just do not know the real formula for pipe length. I helped a customer design and build a custom 4T race pipe for a single cylinder on the dyno once. He built a test exhaust which simply came out the side of the chassis and made it way too long, we then chopped off about an inch at a time until it made good power...that sorted header length and he was then able to build his actual pipe to fit the bike in the correct length. It was an interesting experiment and I have yet to see a 4T scooter pipe that really looks right based on that experience.
    Diminished expectations is the key to happiness in life.

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

  13. #58
    apriliaforum expert scooterman's Avatar
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    Hmmm...would the KTM Moto 3 250 GPR reveal any clues as to header length? ...even though it's a short stroke, 14000 rpm, 180lb, 50hp beast.


    '09 SC 250
    V4 Malossi Head & Cylinder (ported & polished ; j )
    203cc Injector (Scarabeo 500)
    Akrapovic slip-on
    12g sliders w/ stiff clutch & contrast springs
    Michelin Power Pure

  14. #59
    Honest always, feared often Micah / AF1 Racing's Avatar
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    Nope, we need to find a truly optimized header intended for peak power in the 7-9k range...Ducati HM1100 may be closer to right. Where did you find the moto 3 pic...can you link to it or post pics, I am interested to see it.
    Diminished expectations is the key to happiness in life.

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

  15. #60
    apriliaforum expert redratbike's Avatar
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    Quote Originally Posted by scooterman View Post
    Hmmm...would the KTM Moto 3 250 GPR reveal any clues as to header length? ...even though it's a short stroke, 14000 rpm, 180lb, 50hp beast.
    heres the only pics i can find
    Name:  resizedimage600400-KTM-chassis-1.jpg
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Size:  50.3 KB
    Last edited by redratbike; 10-20-2012 at 04:42 PM.

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