Hi Harry,
Could you please assist me with this:
I'm using motorcycle and I have set-up gears ration as per specyfication provided by BMW.
But i can see that corrdct values and gears indication depends on Drive ratio.
I can't find anywhere Drive ratio for my bike but can find Primary ratio (is it the same ?).
If I use this value provided by BMW for my bike 1.652 then calculation is completly wrong like on picture below:
And then indication of the gears on the screen is always 1st gear
When I set-up Drive ratio to 5.35 then i can see max speed on the gears correct but ger indication is wrong again and is showing me gear 2 on gear one etc.
Then when i set-up Drive ratio 4.45 max speed on the gears is incorrect but - gears indication is very close to work perfect (not on high RPM).
Coul You please help me understand Drive Ration set-up for motorcycles ?
Best regards:
Seba
Gears indication and Drive ratio
Gears indication and Drive ratio
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- dsk.jpg (201.39 KiB) Viewed 1151 times
Re: Gears indication and Drive ratio
Gears and drive ratios multiplied need to be the inverse of engine and wheel revs. Or as a formula
- Harry
- engine rev = gear ratio * drive ratio * (rear) wheel rev
- Harry
Re: Gears indication and Drive ratio
Hi Harry,
I thought that i will find out correct settings by myself, but now I gave up.
Please help:
My bike is: BMW S1000R 2017
I can't find full spec for my 2017 bike but have for previous model - which is/should be almost no difference.
Please help with Drive ratio.
Thank You in advance
I thought that i will find out correct settings by myself, but now I gave up.
Please help:
My bike is: BMW S1000R 2017
I can't find full spec for my 2017 bike but have for previous model - which is/should be almost no difference.
Please help with Drive ratio.
Thank You in advance
- Attachments
-
- s1000r.JPG (160.83 KiB) Viewed 1015 times
Re: Gears indication and Drive ratio
I‘d suggest 45/17*1.652, i.e. 4.37
In case this doesn’t work, please post any precise speed readout for a known gear and a known rpm value. This allows inverse calculation of the missing value.
- Harry
In case this doesn’t work, please post any precise speed readout for a known gear and a known rpm value. This allows inverse calculation of the missing value.
- Harry