Advice about gearing

[CoolvetteTopic starterBerichten: 107]

I need some advice about which gearing to chose.

My intention is to build a short track sprintbike, the distance is as short as 75 meters.

I have counted the present gearing in my back wheel variator (or whatever it´s called) and I count to
about 14,5 laps on the incoming axle before the wheel axle have completed a full revolution.

As you may have seen my setup is a Dr Evo, a side intake, a Malossi variator and I will run with 16 inch wheels.

My question is if this gearing is too low to be useful on a track that short?
I don´t mind top speed a bit, the goal is to run the distance as fast as possible.

In my perspective it could be good but I don´t want it to reach full rpm´s after half the distance either.

By the way, what kind of RPM´s can be expected from the 43 mm Dr Evo?

[ritzeBijdragerBerichten: 3421]

this one is with a malossi reedvalve case
but wont be much different with your setup

the cilinder was LC but un-tuned and peak power wil be around 8500 10.000 rpm on a handmade axhaust

De budget beun tjoener: geen geld is te duur of het werkt nog niet
Link naar Mijn collectie / Projecten.

[CoolvetteTopic starterBerichten: 107]

ritze :

this one is with a malossi reedvalve case
but wont be much different with your setup

the cilinder was LC but un-tuned

OK, not bad.
Then I now a bit more what to expect.

[ritzeBijdragerBerichten: 3421]

14.5 turns is pretty good for fast accel. i think youre sittin golden with that gearbox

De budget beun tjoener: geen geld is te duur of het werkt nog niet
Link naar Mijn collectie / Projecten.

[CoolvetteTopic starterBerichten: 107]

ritze :
14.5 turns is pretty good for fast accel. i think youre sittin golden with that gearbox

Yes, I figure that it should work but we will see when I get to do some tests.

By the way, what kind of rpm meter do you have?
Where can I get one?

[ritzeBijdragerBerichten: 3421]

that is a oppoma pet 2000 dx pulse rev counter.

but they are pricy, the cheapest i found was 120 dollar, but they also cost 260 dollar.
stage 6 has got also some of those counters so many options to choose from

De budget beun tjoener: geen geld is te duur of het werkt nog niet
Link naar Mijn collectie / Projecten.

[Gebruiker]

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