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Post by gy6808 on May 14, 2013 21:42:06 GMT -5
So stock is 15/51... 13-1 ratio... stupid low... I'm not looking for 80mph but at least faster than stock... I'm running a bbk 100cc with 26mm carb n a UNI filter... it has good power n tops off too fast... im doing 51mph says my gps... can't trust the chinometer... so I want some suggestions on gears... three choices... 17-41, 16-42, or 18-46???
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Post by chihuahuas on May 14, 2013 22:58:28 GMT -5
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Post by alleyoop on May 14, 2013 23:03:01 GMT -5
If you have 15/51 go with 18/46
Alleyoop
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Post by justbuggin2 on May 14, 2013 23:24:07 GMT -5
DX
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Post by millsc on May 15, 2013 0:02:55 GMT -5
18/46 is 2.61 ratio for me would be too sluggish on hills and take off if you are on flat ground mainly id do it but i have too many hills
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Post by gy6808 on May 15, 2013 17:43:33 GMT -5
Figures don't lie but,, Lie-rs can Figure  Man u got to do the numbers, No fun if you don't. If I did the numbers... I wont be here asking now would I??? I figure someone here would of already done it... I'm just looking for better top speed where my engine isn't whining out... only reason I got 51mph with down wind cuz of the bigger variant or... stock variant or got me 45mph.  If you have 15/51 go with 18/46 Alleyoop Is that the biggest top end??? Might be too much... I'm only looking for milder top end... so what are the 17-41 n 16-42??.. |
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Post by carasdad on May 15, 2013 17:52:06 GMT -5
So stock is 15/51... 13-1 ratio... stupid low... I'm not looking for 80mph but at least faster than stock... I'm running a bbk 100cc with 26mm carb n a UNI filter... it has good power n tops off too fast... im doing 51mph says my gps... can't trust the chinometer... so I want some suggestions on gears... three choices... 17-41, 16-42, or 18-46??? So is that 15/51 your primary or secondary gears? Btw..I know what you mean..my 2 stroke came with 13.5:1 Nice I suppose if I want to drag race...cause the rpm's get up there fast. The 18/46 would give that set of gears a 2.55:1 ratio...so for over all ration you would need to know what your other gears are...then do some math. But if alleyoop suggests 18/46...he is a very wise man on the GY6 Scoots and has done gear swaps. |
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Post by alleyoop on May 15, 2013 17:53:59 GMT -5
Figure it this way, and you decide, for every TOOTH UP AND 1 DOWN REALISTICALLY you will gain 3-4 mph and figure on the 3mph that way if you will be pleasantly surprised and pleased if you get a little better. So with the 18/46 you should get anywhere from 8-10 mph it all depends on your rpms.
Alleyoop
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Post by hank on May 15, 2013 17:59:03 GMT -5
Hi
Out of your three choices i would go with the 18/46 also, once they are installed your going to have to fine tune your roller weights
I went with 17/49 with 8.5 gram sliders on my 4t bbk scoot, topend 54 to 55mph at 8,500 rpms
Take care and ride safely my friend
Yours Hank
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Post by millsc on May 15, 2013 20:21:05 GMT -5
As long as you have the power to push the gears you'll be fine im gonna do another 16/50 set on my new one on the way i can't sacrifice too much low end torque or hill climbing power, too many hills and stop and go where i drive
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Post by geh3333 on May 16, 2013 6:23:40 GMT -5
What size rollers r u running and what are your rpms at top speed? Umay gain top end with a heavier roller weight. And just like millsc said you may not have the power to push the bigger gears
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..BAD TO THE BONE..
