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Discussion Starter · #1 ·
I know this has been talked about many times over and over but I keep hearing mixed answers. I just ordered 14T/42T sprockets for my 848 EVO per the recommendation from a vendor. After doing some research I have mixed feelings about my decision, seems like too aggressive of a jump from the stock 15/39. I’ve also heard that 14T is not good for the bike due to the chain hitting the swing arm. Should I have gone 15/40-42 instead or maybe 14/40? My primary use of the bike is commuting and street with an occasional track day like once or twice a year.


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I know this has been talked about many times over and over but I keep hearing mixed answers. I just ordered 14T/42T sprockets for my 848 EVO per the recommendation from a vendor. After doing some research I have mixed feelings about my decision, seems like too aggressive of a jump from the stock 15/39. I’ve also heard that 14T is not good for the bike due to the chain hitting the swing arm. Should I have gone 15/40-42 instead or maybe 14/40? My primary use of the bike is commuting and street with an occasional track day like once or twice a year.


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I run 14 41/42/43 depending on the track and never had the chain hit the swing arm.


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Probably to much for the street. The 14 alone will be a big improvement imo for daily riding.


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Discussion Starter · #6 ·
http://gearingcommander.com/

Takes a little to figure out how to use it if you've never seen it before. Have fun.

Personally, I would have gone with 15/43.


I’ve seen it already.
May I ask why?
Is there a difference (pro/con) to going down one in the front and staying 39 in the rear vs 15 and rear going up to match the 14 setup (15/42 or so)?


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A 43 rear you’d probably have to change your chain length.


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I’ve seen it already.
May I ask why?
Is there a difference (pro/con) to going down one in the front and staying 39 in the rear vs 15 and rear going up to match the 14 setup (15/42 or so)?


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I would rather keep the 15 front so that the chain isn't going around a smaller radius. Less bend. Same goes for the rear. The kicker is that with the 15/43 combo instead of the somewhat similar 14/42, it has the advantage of not hitting the same places on the chain and sprockets as often which should mean longer life in theory. The required chain length is the same according to gearing commander.
 

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I know this has been talked about many times over and over but I keep hearing mixed answers. I just ordered 14T/42T sprockets for my 848 EVO per the recommendation from a vendor. After doing some research I have mixed feelings about my decision, seems like too aggressive of a jump from the stock 15/39. I’ve also heard that 14T is not good for the bike due to the chain hitting the swing arm. Should I have gone 15/40-42 instead or maybe 14/40? My primary use of the bike is commuting and street with an occasional track day like once or twice a year.


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Hi I have just put new chain and sprockets on changing from 14/39 to 15/42 which I think will be fine for road and track 👍
 

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I run 14 41/42/43 depending on the track and never had the chain hit the swing arm.


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Hi!
I’m about to install 14/42 sprockets on my 848 2008, do I have to use 100 links chain?
When I was putting on the 14/40 with 98 links, the rear wheel is touching the swingarm and with 100 links I can’t get enough chain tension.
I use a Michelin power slick 190/55 rear rubber.
Regards
Tomas in Sweden
 

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Hi!
I’m about to install 14/42 sprockets on my 848 2008, do I have to use 100 links chain?
When I was putting on the 14/40 with 98 links, the rear wheel is touching the swingarm and with 100 links I can’t get enough chain tension.
I use a Michelin power slick 190/55 rear rubber.
Regards
Tomas in Sweden
I installed new everything at that point and switched to a 520. I also move the eccentric to the back position so I can run a bigger tire.



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