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Mini Dirt Bikes & Pit Bikes Forum

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  1. M

    Build Your Own Pitty

    1. Engine http://cgi.ebay.com.au/Super-125cc-4ST-engine-ideal-thumpstar-and-pocketbike_W0QQitemZ230014986605QQihZ013QQcategoryZ29705QQrdZ1QQcmdZViewItem 2. Frame...
  2. M

    Sprocket Ratios

    I've been playing with a few numbers that a few of you might find interesting or helpful. Count your front and rear sprocket teeth and check it on the quick reference table. Then find that ratio on the sliding scale and you'll get and idea if your bike is geared for top or bottom end. It is...
  3. M

    My 2 cents worth...

    I entered the world of mini dirt bikes with the purchase of two bikes for my sons. One is an Atomik running a Ducar 125cc and the other is a 70cc with no case bages (Can anyone help identify the serial DJ139FMB - I'm just trying to identifty it now) It's a CRF copy with 'Monster' decals (which...
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