After months of planning - here is my first build

Discussion in 'Photos & Bicycle Builds' started by Critik, Jul 21, 2013.

  1. Critik

    Critik New Member

    Hey guys,

    I've been working on this project for a few months and have got'er running great!


    So here is the finished product - it is a 7 speed Macargi beach cruiser with a custom machined mount for the 49cc Grubee Skyhawk motor. I have replaced the stock spark plug with a NGK B6S which has increased the overall performance of the bike.

    I have a 4L fuel tank and a upgraded exhaust. Here are a few more pictures.

    1010903_10151679258251348_1002855766_n.jpg 1003962_10151679258136348_776405235_n.jpg 996716_10151679258206348_69923582_n.jpg 999893_10151679258036348_495624254_n.jpg 1005562_10151679258011348_1768121741_n.jpg

    My next upgrades will be to add [FONT=arial, helvetica, clean, sans-serif]a pannier (rear rack) as well as a retro head light. What do you guys think!?[/FONT]

  2. LR Jerry

    LR Jerry Well-Known Member

    Look up and read on how to reinforce fenders. It could literally save your life.
    Critik likes this.
  3. Fabian

    Fabian Well-Known Member

    You need to get rid of the single speed system and get yourself a SickBikeparts shift kit.
  4. Critik

    Critik New Member

    I did not even know this existed!!!! I am very excited to try this, thanks for the heads up!
  5. Fabian

    Fabian Well-Known Member

    and then you need to get a Jaguar CDI and a Rock Solid Engines Walbro carburettor and a Rock Solid Engines Reed Valve Intake that's compatible with the Walbro carburettor.
    Critik likes this.
  6. Fabian

    Fabian Well-Known Member

    Once you've done that, you'll need to get yourself a centrifugal clutch accessory attachment.
  7. Critik

    Critik New Member

    Fabian, you got me interested, now I gotta see your bike, would you post a link to it?
  8. wheelbender6

    wheelbender6 Well-Known Member

    Take your time and do you your research before spending your money on upgrades. Something that works well for one member may not work as well for you in your climate and terrain.
  9. Fabian

    Fabian Well-Known Member

    Do a Google search for,

    "Bike Build as of March 2012"


    "Walbro Style Carburettor for Rock Solid Engines Reed Valve Intake"


    "Multi Combination Bicycle Trailer Setup"
  10. BamaJNJ

    BamaJNJ New Member

    Nice looking ride Critik!!
  11. KCvale

    KCvale Motorized Bicycle Vendor

    Nice bike choice Citrik, I like the Macargi Pantera 7-S to build on too.

    You said you used a 49cc SKyhawk (they are 48cc) but it must be an old one as yours has an old NT carb and they have shipped with CNS carbs since 2010.
    That's OK with a 48, especially with an expansion chamber, and they are a solid motor.

    How did you do your handlebars?
    I move the shifter to the left side and put a dual-pull brake lever on the right.


    It looks like you have your rear sprocket cupped out, isn't that causing chain jump with both rag joints in? Or did you leave the outer rag out and cup out? I hope not.

    The sprocket fits over the rear hub and aligns perfect to the motor cupped in with both rags, you just have to trim the fender for the chain.

    One other note is the NGK BRP7HIX Iridium plug is a far better plug you will REALLY feel a difference with over the B6S.

    You mentioned a Panner, I just built this Pantera for an extremely short woman with a back rack and collapsible rear baskets. It is a bit tricky to get the rack rails around the fender but they work well and get out of your way when not in use.


    Someone mentioned a shift kit for these, yes, they work great on the Pantera too.


    You can even drop a 49cc 4-stroke shifter in them.


    Note that on 4-strokers I have the bike shop replace the 7-speed with a 3-speed internal so I can use fatter chain and 3 gears is plenty with a 4-stroke to go 0-20MPH in 4 seconds, 0-40MPH in ~8 seconds. The 7-speed works well with 2-strokers however and just got the parts in to start another 2-stroke shifter tomorrow.

    More details on how I do the Pantera's here as I build a lot of them.

    Again I commend your parts selection, now you have an idea what can be done with them for improvements ;-}