14T sprocket is a big improvement!
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14T sprocket is a big improvement!

This is a discussion on 14T sprocket is a big improvement! within the Monkey Talk forums, part of the Honda Monkey 125 Forums category; Let me just say that this $9 sprocket upgrade works great! I'm 250 lbs and wow, what an improvement! I use to have issues pulling ...

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    14T sprocket is a big improvement!

    Let me just say that this $9 sprocket upgrade works great! I'm 250 lbs and wow, what an improvement! I use to have issues pulling hills and maintaining speeds on an incline but not no more. It actually pulls in 4th gear now! The gearing feels much better. It doesn't feel like it's over revving or any where near the redline either. I'd imagine that may happen to the lighter riders because it would go through the gears quicker. I recommend this upgrade for anyone 200+lbs. Here's the part # if anyone's interested JTF249 14

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    Danny Linguini's Avatar
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    I just ordered one for mine. I’m about 175 lbs, and I’m having the issues on the hills, too. I won’t be taking mine on the highway, so top end is not a concern. I just want a little more snap on take-off, and hopefully not have to downshift quite as much going up hills.

    Can anybody provide a link to the speedo correction thingie?
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    FluxCapacitor's Avatar
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    Hard Racing has one :


    Speedometer Correction Device
    Now You can easily adjust your speedometer so it's accurate
    Easily Compensate for tire size changes, and gearing Changes
    Slim Design / Simple to use
    PLUG-n-PLAY

    SRD H8 - Fits: '13-'19 Honda GROM / Grom SF / GROM ABS
    $70
    IN STOCK
    >> watch Installation video <<

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    Thanks for the link. I may also be interested in this as well.

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    I weigh in at 240lb's (don't tell my wife or doctor) and I'm finding around 51mph is about all Yellow Monkey wants to do
    on flat open roads no wind.
    53 if I sweet talk to it.

    So, would this allow me to see 60mph?

    Honestly these bikes really shouldn't be pushed much past 45 mph in my opinion.
    But, I'd like a bit more speed if possible at times.

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    No. A sprocket won't increase your top speed by 20%

    You need horsepower to do that.
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    Quote Originally Posted by Getbusylivin View Post
    Let me just say that this $9 sprocket upgrade works great! I'm 250 lbs and wow, what an improvement! I use to have issues pulling hills and maintaining speeds on an incline but not no more. It actually pulls in 4th gear now! The gearing feels much better. It doesn't feel like it's over revving or any where near the redline either. I'd imagine that may happen to the lighter riders because it would go through the gears quicker. I recommend this upgrade for anyone 200+lbs. Here's the part # if anyone's interested JTF249 14
    Do you have an intake an exhaust? I put a 14 tooth on and it was a moderate increase in speed but when i put the chimera intake and hindle exhaust on it was huge. In the process of getting the 143cc big bore kit and cam put on now. With the intake and exhaust I think you might gain 1 or 2 hp but the big bore kit you will have about 12 or 13 HP up from the stock 8. My friend runs a 13 tooth front sprocket and that works really well too.

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    Quote Originally Posted by Monkey Rider Ken View Post
    I weigh in at 240lb's (don't tell my wife or doctor) and I'm finding around 51mph is about all Yellow Monkey wants to do
    on flat open roads no wind.
    53 if I sweet talk to it.

    So, would this allow me to see 60mph?

    Honestly these bikes really shouldn't be pushed much past 45 mph in my opinion.
    But, I'd like a bit more speed if possible at times.
    From what I've read, in stock form these will shut down at 67mph....more likley down hill I'm sure. That's a little too fast for me so if I can put a 14T on it and have the capability of 60 then I'm good to go. I just needed more pull in the gears and that's exactly what it does. As long as I can travel somewhere in the low 50s and have control over it that's all I need. Before I had no control over acceleration when I needed it.

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    WV_Grom's Avatar
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    If you cannot hit the rev limiter on level ground in 4th gear (15T), a 14 toother will gain you top speed in comparison to the 15 toother under the same conditions..
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    Quote Originally Posted by WV_Grom View Post
    If you cannot hit the rev limiter on level ground in 4th gear (15T), a 14 toother will gain you top speed in comparison to the 15 toother under the same conditions..
    Well said. Gearing was just too tall for my weight. I still can't hit the rev limiter with a 14T but I'm a lot happier with it over the 15. I'm not interested in trying a 13T either.
    50-50 likes this.

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