produced

  1. Formula390

    520 16T Fronts

    To add to the mix, I'm now also producing a Chromoly 4140 Hardened Rockwell 36C front sprocket for the stock 520 chain. These sprockets are hard clear through, not case hardened as most front sprockets are. This means it'll last a LOT longer. Going up to a 16T front is basically about the same...
    • Formula390
    • Thread
    • 16t 36c center chain chromoly configurations dropping formula390 front gear hard hardened lengths link machining means produced ratio ratios sprocket sprockets steel stock usa vertical
    • Replies: 3
    • Forum: Formula390
  2. A

    My first RC390 :) Ongoing review..

    **Side note I am probably like most of you guys and been riding for 30+ years with far too many bikes come and gone. But this is my smallest bike ever owned and I'm looking forward to it more so than many others that have passed through the shed :) Took my little beast up my local hills to...
  3. S

    New to the forums

    Howdy. Stumbled across the RC390 while researching bikes and instantly fell in love, I've always been attracted to smaller displacement bikes with an emphasis on handling unfortunately it seems like most of the great stuff was never available in the US. A little history, my first bike was an...
    • Storz
    • Thread
    • bike bikes love produced rc-390
    • Replies: 0
    • Forum: Introductions
Top