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Offline englishrob

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Chain and sprocket time
« on: August 07, 2020, 07:29:19 AM »
2011 XC - used 70% on road 30% sand/trail.... :465: its time to replace the original chain and sprockets - what is the optimal configuration that would drop the revs a little on the longer rides without compromising the off-road torque.....thanks

Offline crispey

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Re: Chain and sprocket time
« Reply #1 on: August 07, 2020, 10:34:36 AM »
Have a look on  https://www.gearingcommander.com/ it might help you

Online Tallpaul

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Re: Chain and sprocket time
« Reply #2 on: August 07, 2020, 11:18:17 AM »
First gear is quite high anyway and won't help you off road if you raise it.

Offline KildareMan

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Re: Chain and sprocket time
« Reply #3 on: August 07, 2020, 12:10:01 PM »
Personally I'd leave well enough alone.
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Offline taff

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Re: Chain and sprocket time
« Reply #4 on: August 07, 2020, 03:40:47 PM »
*Originally Posted by englishrob [+]
2011 XC - used 70% on road 30% sand/trail.... :465: its time to replace the original chain and sprockets - what is the optimal configuration that would drop the revs a little on the longer rides without compromising the off-road torque.....thanks

I've gone +1 tooth on the front sprocket. Done about 50k miles in that configuration with no problem at all. It still accelerates like a scalded cat when you drop a couple of gears and nail it   :028:

Offline chuckxc

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Re: Chain and sprocket time
« Reply #5 on: August 07, 2020, 11:20:25 PM »
Professional mechanical engineers  and highly experienced motorcycle test riders at the Triumph factory, after extensive track/road testing and analysis,  decided that the OEM sprocket selection was the optimum configuration for this model.  Unless you have a compelling reason to change it, and know better than them, I'd leave it as is and just enjoy the ride.
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Offline K1W1

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Re: Chain and sprocket time
« Reply #6 on: August 08, 2020, 02:41:15 AM »
*Originally Posted by englishrob [+]
2011 XC - used 70% on road 30% sand/trail.... :465: its time to replace the original chain and sprockets - what is the optimal configuration that would drop the revs a little on the longer rides without compromising the off-road torque.....thanks

None.
Anything that drops the revs on the highway will make the tall first gear even taller and almost unusable off road.

Offline taff

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Re: Chain and sprocket time
« Reply #7 on: August 08, 2020, 09:52:05 AM »
*Originally Posted by chuckxc [+]
Professional mechanical engineers  and highly experienced motorcycle test riders at the Triumph factory, after extensive track/road testing and analysis,  decided that the OEM sprocket selection was the optimum configuration for this model.  Unless you have a compelling reason to change it, and know better than them, I'd leave it as is and just enjoy the ride.

Professional mechanical engineers and highly experienced motorcycle test riders at the Triumph factory, after extensive track / road testing and analysis agreed on the compromise that we see on the production models. This includes engine power output, suspension set up and gear ratio.

This doesn't mean that the ratio is the best for all users as everyone uses their motorcycle differently, changing the front sprocket +/- 1 tooth makes a difference of about 4mph at 5k revs in 6th. You are not changing the world.

Offline taff

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Re: Chain and sprocket time
« Reply #8 on: August 08, 2020, 09:54:05 AM »
*Originally Posted by K1W1 [+]
None.
Anything that drops the revs on the highway will make the tall first gear even taller and almost unusable off road.


really?   :087:

 :492: :492: :492:

Offline NORTY

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Re: Chain and sprocket time
« Reply #9 on: August 12, 2020, 05:09:39 PM »
OP~
With your "70/30" use, you might as well leave it stock.

If you were "99/1,"  then I might suggest +1 CS.

Conversely, if you were "1/99," I'd say "GET A HUSKY 701!"

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