[Im to PRO]

i have a 50 with pretty much stock gearing. have a 38 tooth in the back and i am running a 88 kit with race head. my problem is that my bike is topping out of its top speed way to quickly. i am racing at havasu and i heard their track is very fast. my question is what would be a good front sprocket? 15 tooth or 16 tooth? also, takagawa's sprocket has holes inside of it. Will this effect how it works compared to one with no holes?

 

[fiveho]

i would go with the 16. and have the 15 on standby just in case. the holes wont make a difference

 

[doopsx3]

go with the 15T ..good all around counter sprocket when you are using 37 or 38 rear...I have 15/37 on my kiddos bike ..it has an 88 and a 4spd...it friggin hauls with her or me and has plenty of grunt...the holes in the Tak are just to lighten it..the metal in the Tak sprocket is better than stock....in this reply I assume you now have a 13 or a 14 tooth counter......a 16 may be a bit much IDK

 

[Im to PRO]

ya. i think i may go with the 16. i have 2 main sprockets ( 34 tooth and a 38 so if the 16 is to large, will the 34 tooth basicly make it back to a 15 tooth?

 

[fiveho]

ya. i think i may go with the 16. i have 2 main sprockets ( 34 tooth and a 38 so if the 16 is to large, will the 34 tooth basicly make it back to a 15 tooth?

no, wrong way. if the 16/38 doesnt work, the 16/34 will be worse

 

[fiveho]

go with the 15T ..good all around counter sprocket when you are using 37 or 38 rear...I have 15/37 on my kiddos bike ..it has an 88 and a 4spd...it friggin hauls with her or me and has plenty of grunt...the holes in the Tak are just to lighten it..the metal in the Tak sprocket is better than stock....in this reply I assume you now have a 13 or a 14 tooth counter......a 16 may be a bit much IDK

cant really compare gearing from 4 speed to 3 speed, which im assuming he's running

 

[Im to PRO]

wait, so your saying that the 34 tooth will make it go faster in the long run but slower acceleration? so if thats right, i guess i will do the 15t and then just see what does better at the track. the 34 or the 38. does that sound right? also, how much of a difference will 1 tooth in the front make?

 

[doopsx3]

cant really compare gearing from 4 speed to 3 speed, which im assuming he's running

I think that the 3rd gear in a 3spd is close to the same final drive ratio as 4th in the 4spd........so if that is true it would not make a difference

 

[Im to PRO]

ok. so i guess i am going to order the takagawa 15t sprocket. thanks for input guys.

 

[fiveho]

wait, so your saying that the 34 tooth will make it go faster in the long run but slower acceleration? so if thats right, i guess i will do the 15t and then just see what does better at the track. the 34 or the 38. does that sound right? also, how much of a difference will 1 tooth in the front make?

yeah, since you have the 34 handy just do the 15/38. then if its too slow of top speed throw the 34 on. it will basically be like putting 16 on the front....and then some

 

[fiveho]

also, how much of a difference will 1 tooth in the front make?

going up a tooth in front is like going down 3 in the back

 

[ridetheblue14]

yup, 1 in the front 3 in the back

 

[ridetheblue14]

if I went from a 43 to a 39, I would get more low end right?

 

[doopsx3]

if I went from a 43 to a 39, I would get more low end right?

uhh no more top

 

[fiveho]

if I went from a 43 to a 39, I would get more low end right?

no, more speed

 

[doopsx3]

here is the deal



49 divided by 13 (13/49)=3.77 ur final drive ratio

43 divided by 13 (13/43)=3.30 ur final drive ratio





the smaller the final drive ratio the taller the gear (sounds backwards)more top

the larger the fnal drive ratio the lower the gear (i.e. more low end)

 

[Im to PRO]

ok. thanks guys​

 

[ridetheblue14]

what would be a good move for the gearing on a SDG107? with a 16/43 stock set-up.

 

[doopsx3]

16/43 is stock???? hmm I think I have 14/38 on mine

 

[dirtbkr188]

16/43 is stock???? hmm I think I have 14/38 on mine

Not a whole helluva lot of difference between those two ratios...



16/43 = 2.688:1

14/38 = 2.714:1