Gear ratio's

FREE tuning and maintenance info, plus links to our original tuning pages that started it all off.
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kevspeed
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Fri Apr 02, 2021 12:38 pm

Hi,bit of an odd one this,but one for the mathematically competent.
Most of us have read the Webster tuning manual,a great source of information,but i cant for the life of me work out how to calculate the % rise from 3rd gear to 4th gear as he does in his gearing charts.
These days there are more gearsets available,so i would like to be able to calculate the jump between gears.
Im thinking in particular of the Vijay Mk 2 gearbox that uses the Li150 3rd and the SX200 4th.
Hopefully there is a mathematician out there that doesnt have to use his fingers,then his toes to count!

nick b
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Sat Apr 03, 2021 6:24 pm

Vijay 150 is rated the worst gearbox alongside sx 150 aND GP 150 from my sources go for a pacemaker or if yout can spend the money an afternoon 5 speed

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drunkmunkey6969
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Sun Apr 04, 2021 10:36 am

See our YouTube scooter channel for Tech-help: https://www.youtube.com/c/TheScooterFactory/videos

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kevspeed
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Sun Apr 04, 2021 12:49 pm

drunkmunkey6969 wrote:
Sun Apr 04, 2021 10:36 am
Use this: https://avantone.wordpress.com/
Fab stuff,not seen that before,very useful,thank you.....Kev

holty
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Mon Apr 05, 2021 3:05 pm

the early vijay 150 box is actually a good gearbox as the jump between 3rd and 4th is even smaller than the indian gp200 gearbox, as said the mk2 box is dire as its got a massive jump between 3rd and 4th and is not good if you have a narrow powerband. i use the gearbox calculator on here look down the index to the bottom, sadly vijay is not on it.

YAMLAM
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Sat Apr 10, 2021 4:54 pm

holty wrote:
Mon Apr 05, 2021 3:05 pm
the early vijay 150 box is actually a good gearbox as the jump between 3rd and 4th is even smaller than the indian gp200 gearbox, as said the mk2 box is dire as its got a massive jump between 3rd and 4th and is not good if you have a narrow powerband. i use the gearbox calculator on here look down the index to the bottom, sadly vijay is not on it.
according to the Avatone gear box visulizer , vijay mk1 % rise between gears is 43,47,29
Indian GP200 43,47,19
italian 43,35,30.
win or lose have a booze

YAMLAM
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Sat Apr 10, 2021 4:56 pm

Just realized your talking about the 150 box. soz
win or lose have a booze

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