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Very Active Member
 larger sprocket and belt
Hey all !!
2019 F3L
Has anyone changed their sprocket and belt to the larger one without ECM flash ??
Tommy J.
 F3L SE5 Black -- F4 windshield w/wings, Reggie LED headlights, driving lights & Cyclops LED, Ultimate seat, Fox shocks, BajaRon swaybar, Lamont highway centerline pegs & 3rd peg, Lamont belt tensioner, K&N air filter, Baker air wings & cup holder, CanAm hitch.
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Tommy, I don't think anyone has done it successfully, with or without a ECM flash.
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The Limited comes with 28/79 final drive ratio.
The F3-S and Base model F3 comes with 28/ 89 final drive ratio.
This is true for North American sales models.
I don't know for sure, but it might be possible to install the pulleys and belt from a stock F3-S on the Limited.
It is also possible the different fenders, belt guards, etc would interfere with the larger rear pulley. It might require some modifications to do the swap.
Speedometer would be wrong. Might also run into some other, more serious problems.
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the computer does not like the different gear ratio!
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The sprockets and belt can be physically installed with out much trouble. The nanny does not approve and the settings in megatech BUDS are as yet unknown. There is a setting for the rear sprocket size but changing this alone does not fix things.
The short answer is that no one, even with an aftermarket tune, as been able to make it work. If you want the large rear sprocket, buy an F3S.
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Very Active Member
 Originally Posted by jcthorne
The sprockets and belt can be physically installed with out much trouble. The nanny does not approve and the settings in megatech BUDS are as yet unknown. There is a setting for the rear sprocket size but changing this alone does not fix things.
The short answer is that no one, even with an aftermarket tune, as been able to make it work. If you want the large rear sprocket, buy an F3S.
My 2016 T has the 89 tooth listed also 2017
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Originally Posted by Rattlebars
My 2016 T has the 89 tooth listed also 2017
2017 was the last year for the 89 tooth on the F3-T. From 2018 on, the F3-S is the only one with the larger 89 tooth sprocket.
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to see my 2016 F3-T and many how to's
