pewpew
Scoot Enthusiast
Posts: 254
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Post by pewpew on Dec 2, 2020 16:34:08 GMT -5
Would it be worth to change the 2fast 86cc exhaust for a mxs gp90 exhaust? Another option would be the new stage6 90-100cc exhaust.
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pewpew
Scoot Enthusiast
Posts: 254
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Post by pewpew on Dec 13, 2020 11:34:27 GMT -5
I ordered the mxs gp exhaust, should be here this week. Next question is, how much longer gears could the bike use? Stock gears are 13/52 primary, 14/42 secondary. 12:1 gear ratio. I used stock primary gears and 15/39 secondary gears on my tpr, it was 10.4:1 gear ratio. Could 15/50 primary gears and 14/41 secondary gears work? The gear ratio would be 9.75:1.
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Post by Lucass2T on Dec 14, 2020 8:09:51 GMT -5
Why do you ask?
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pewpew
Scoot Enthusiast
Posts: 254
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Post by pewpew on Dec 14, 2020 8:51:53 GMT -5
So i know i dont buy too long gears? |
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Post by Lucass2T on Dec 14, 2020 8:57:48 GMT -5
Define 'too long'
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Post by 90GTVert on Dec 14, 2020 9:36:13 GMT -5
9.8:1 from 10.4:1 isn't a massive change. Definitely makes a difference, but considering how well the TPR pulled the 10.4:1 gearing, I'd think the 9.8:1 may be feasible. That or just try the 10.4 and see how it goes so you can use that info to decide how big of a step you think it can take. You can play with the calculators here to see potential changes. www.49ccscoot.com/calculators.htmlNumerically lower gear ratio. Gearing for higher top speed. |
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Post by Lucass2T on Dec 14, 2020 11:18:33 GMT -5
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pewpew
Scoot Enthusiast
Posts: 254
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Post by pewpew on Dec 14, 2020 11:44:22 GMT -5
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pewpew
Scoot Enthusiast
Posts: 254
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Post by pewpew on Dec 14, 2020 11:47:46 GMT -5
9.8:1 from 10.4:1 isn't a massive change. Definitely makes a difference, but considering how well the TPR pulled the 10.4:1 gearing, I'd think the 9.8:1 may be feasible. That or just try the 10.4 and see how it goes so you can use that info to decide how big of a step you think it can take. You can play with the calculators here to see potential changes. www.49ccscoot.com/calculators.htmlNumerically lower gear ratio. Gearing for higher top speed. Thank you. I already sold the old gears, but they were on the edge of being too long for the power. In the top speed video i posted on the forum, you can hear the cvt shifting and rpm dropping. The bidalot kit will have more power but i dont know how much of a difference the longer gears make. |
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Post by 90GTVert on Dec 14, 2020 12:03:07 GMT -5
~5MPH difference with that sort of change in ratio (0.6:1) based on a calculator. If you weren't overrevving to do 85MPH before, then there's probably more in those gears if both kits rev about the same.
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pewpew
Scoot Enthusiast
Posts: 254
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Post by pewpew on Dec 14, 2020 12:07:07 GMT -5
~5MPH difference with that sort of change in ratio (0.6:1) based on a calculator. If you weren't overrevving to do 85MPH before, then there's probably more in those gears if both kits rev about the same. What do you mean by over-revving? |
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Post by 808ministroke on Dec 14, 2020 15:54:45 GMT -5
I find it kind of strange how everyone on this forum seems to agree that around 10:1 is ideal for even high power setups. i find this strange because i see alot of set ups on honda elites and sym dd50s that run gearing as high as 7:1 with a ported polini corsa. i know that wheel sixe matters and elites are always 10inch but is there another difference possibly, is the pulley system on a af16 vs a minarelli or piaggio hold shorter ratios perhaps?
I am going up a massive amount on my ratio from 12:1 to 8.5:1 i understand that will require a overhaul on my cvt and i will still lose take off speed but i ran 9:1 gearing on a build with the standard stroke and it pulled fine.
pewpew is your build on 12" wheels and is that why your ideal ratio is around 10:1 instead of 8:1 ?
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pewpew
Scoot Enthusiast
Posts: 254
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Post by pewpew on Dec 14, 2020 16:29:14 GMT -5
I find it kind of strange how everyone on this forum seems to agree that around 10:1 is ideal for even high power setups. i find this strange because i see alot of set ups on honda elites and sym dd50s that run gearing as high as 7:1 with a ported polini corsa. i know that wheel sixe matters and elites are always 10inch but is there another difference possibly, is the pulley system on a af16 vs a minarelli or piaggio hold shorter ratios perhaps? I am going up a massive amount on my ratio from 12:1 to 8.5:1 i understand that will require a overhaul on my cvt and i will still lose take off speed but i ran 9:1 gearing on a build with the standard stroke and it pulled fine. pewpew is your build on 12" wheels and is that why your ideal ratio is around 10:1 instead of 8:1 ? It has 13" wheels |
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Post by captincvmn on Dec 14, 2020 17:43:25 GMT -5
13’s?
I’m a scoot noob but I’ve not seen 13’s. 10’s and 12’s I thought ruled the roost.
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pewpew
Scoot Enthusiast
Posts: 254
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Post by pewpew on Dec 14, 2020 17:58:19 GMT -5
13’s? I’m a scoot noob but I’ve not seen 13’s. 10’s and 12’s I thought ruled the roost.  |
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