center

  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. Formula390

    415 Sprockets

    415 Front Sprockets are rolling off the machining center constantly now. Stock for the rear sprockets should be here later this week and will have an array of offerings for rear sprocket sizes. Sprocket fitment is perfect! These front sprockets are made from hardened Chromoly 4140, and have cold...
    • Formula390
    • Thread
    • $80 center chromoly compare constantly contact delivery directly existing front gear inventory machining options price queue ratio rear rolling sprocket sprockets stock threads week worksheet
    • Replies: 9
    • Forum: Formula390
  3. N

    International motorcycle show USA. Is the 390 there?

    Thinking of heading to the show at the jacob javitz center in nyc this weekend to see the motorcycle show. Anyone know if the 390 will be there?
Top