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Thread: How to install an air cooled big bore kit! Step by step w/pics!!!

  1. #31
    apriliaforum newb
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    Great guide! But isn't it easier to NOT split the moped into two parts? I think it's too much work to split it when it's rather easy to change the cylinder... Or am I wrong?

  2. #32
    apriliaforum Junkie damnfunkyhabana's Avatar
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    its not that its difficult, its just that there's not much room to manuver on the habana/mojito

  3. #33
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    anything else i can do?

    Hi i have an aprilia rally 50cc

    I Have derestricted my variator and have a deresticted leovince ZX exhaust. it currently does 55 is there anything else i can do to make its top end faster?

  4. #34
    apriliaforum Junkie damnfunkyhabana's Avatar
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    70cc and gear up kit


    R.I.P

    Taken out by a Tesco's Extra delivery van 13/02/06

  5. #35
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    Oiltank

    Well that was very helpful. One thing: Oil tank. Is it OK to disconnect oil tank from oil pump? I heard somwhere it should be bleed afterwards because air is not healthy into the system.

  6. #36
    apriliaforum newb baglien's Avatar
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    Mojito big bore setup

    Looks like this thread has run it's course, but I just got my 2004 Mojito. I swapped out the cylinder, head, piston with the Malossi 42mm kit (70cc), put in the Malossi 19mm carb kit, a Leo Vince pipe, the malossi variator / spring and a Malossi clutch. After doing all this, the performance hasn't really gone up - at least no where near what others are indicating. I've double checked the installation of the big bore it - it looks good. I have the needle in the carb at the 2nd position from the top. It starts great and runs fine, but going uphill it maxes out at 25 mph - down hill max speed is 40.

    Any suggestions are appreciated (if any of you are still out there).

  7. #37
    apriliaforum newb
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    Cool Avoid piston seizure

    Sorry to hear about your luck Baglien,
    I'm an old 2-stroke mx racer/ engine builder and I just wanted to put in my 2 cents worth. Before you go WOT (wide open throttle) down the road on your new engine mods, make SURE you do a sparkplug reading to insure your not running too lean or rich. Check the color of the ceramic on the plug tip. It shoud be a nice chocolate milk color. If its white, its running lean and you could have a piston seizure on your hands in a matter of minutes (even on your first test run!) Also make sure you have no air leaks and she's idling smooth. Excessive high idle can idicate an air leak which can also cause lean conditions ie engine failures. A final bit of my humble opinion...run the best damn 2 stroke oil you can buy. BRRAAAAAAAAAAP!:

  8. #38
    apriliaforum newb
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    how fast does it go with a 70 kit on?

  9. #39
    apriliaforum newb
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    Sue neil

  10. #40
    apriliaforum prov-nov
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    Quote Originally Posted by scootnfast View Post
    Now you have to remove the piston. There are ring clips located on each side of the connection pin. I used a very small screw driver and snapped it out. Then push the pin out from the other side, being careful not to damage the roller bearing cage.
    how many miles had this bike covered ?
    also
    how many mile is it before a rebuild is recommended ?
    thans

  11. #41
    apriliaforum newb
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    Good tutorial helped me alot
    Piaggio zip 50 4t

    Polini variator
    Polini kevlar belt
    Polini 2g race clutch
    K&N style air filter
    ngk iridium spark plug
    Size 62 main jet.

  12. #42
    apriliaforum newb
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    Hey piaggiomat, How close is the zip to the fly 4t?

  13. #43
    apriliaforum expert Snugg's Avatar
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    Quote Originally Posted by ampb5rider View Post
    Hey piaggiomat, How close is the zip to the fly 4t?
    You're replying to somebodies comment that is 3 years old and Piaggiomat hasn't been on this forum for 2 years... You might have better luck PMing him

  14. #44
    apriliaforum newb
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    Opps! What a dope! Thanks

  15. #45
    apriliaforum prov-nov Lynch's Avatar
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    hello, Would i have to change anything like fuel/air ratio if I were to remove just the closed off pipes (the ones that were cut off and folded over) ?
    Thanks
    Aprilia SR50 R carb 2009 - De-restricted variator - All stock parts - 6,000 miles - Near perfect condition

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