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#1 |
Join Date: Oct 2020
Posts: 29
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Hawk 250 gearing. Want more top end but good low end
Looking for advise on changing gearing. I already did the 17/45 or whatever ot was (can't remember) it does decent at about 64. Ide like to squeeze a little more top end speed out but still have decent low end torque. What gearing should I do? Can I keep the 17 front and drop the rear a size?
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#2 |
Moderator
Join Date: Oct 2016
Location: Houma, La.
Posts: 11,657
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I was running a 17/40 combo on my hawk. Good for the street but will kill low end for off road. Maybe a 42 or 43 rear.
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#3 |
Join Date: Oct 2018
Posts: 25
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I just pulled off the cover on mine and discovered I'm running a 17/54 and top out at 100 kph at 9500 rpm or so. I'm thinking I want to drop down to a 42 in the back. The BCD is 90mm x 4 for the rear sprocket, and it's .3" thick. I'm guessing the chain is 428, but am not 100% sure.
Would something like this work? https://www.ebay.com/itm/JT-Sprocket...QAAOSw53dgF50- |
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#4 | |
Join Date: Oct 2020
Posts: 29
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Quote:
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#5 |
Join Date: Aug 2020
Location: Australia
Posts: 1,360
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handy ratio chart
using this chart I went with 16f 45r as my first ratio test.
I personally didn't want to commit to 17t front as I don't plan on doing much highway distance and where I live is steep hills and twisties. So I went mid range. hindsight, 44rear might be easier to come by but the seller had a 45 at the time and offered it... They say 3 teeth in the rear sprocket = a 1 tooth change in the front or so. Also smaller sprockets wear out faster than larger sprockets and are harder on the chain, but larger sprockets result in a longer chain therefore larger reciprocating mass and friction loss... so something to consider. my Xl185 runs a 21f 18r wheel. Last edited by XLsior; 04-19-2021 at 07:32 PM. |
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#7 |
Join Date: Oct 2020
Posts: 29
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