Road sprockets; 41 or 42 rear?

Discussion in 'Crazy-Awesome almost Dakar racers (950/990cc)' started by Cycletech, Apr 1, 2013.

  1. Cycletech

    Cycletech Been here awhile

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    Sold my FJR so my 950 is going to be my do-it-all bike this season. She's well passed due for chain and sprockets; any reason not to drop to a 41 rear from the stock 42? Maybe 200 rpm difference on the highway? I see more tarmac in my future than dirt. :cry
    #1
  2. Strokizator

    Strokizator Been here awhile

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    Dropping one tooth from from 42 to 41 is only a 2.3% change, so you'll need to rev it up to over 8500 rpm to see a 200 rpm drop.

    17/42 is about all you need for the highway and then only if you like to hypermile at high speeds. I've run a 16/42 and now a 17/45 and much prefer it even though most of my miles are on pavement.
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  3. Deviant666

    Deviant666 Present

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    17/42 is great for cruising with 6th at about 85-90 mph with only 5600-6000rpm. The giveaway is that your top speed will be attainable with your 5th since our 6th becomes too tall. Best of both worlds I believe is the 16/42 and 17/45. The difference between the two is the longest possible wheelbase for the former vs the shortest possible wheelbase for the later. Longer for high speed stability shorter for flickability....hope it helps...
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  4. Cycletech

    Cycletech Been here awhile

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    Location:
    North Side RVA
    I need to pull the sprocket cover and verify I still have a 17 on the front. If so, maybe I'll try a 16/42. Next question... what 525 chain is a good one to get? I'm leaning towards the EK MVXZ. TIA
    #4