Best sprocket gear ratio for racing?

[doodleface]

Hey guys I'm buying some stuff from rick-o and was gonna get some sprockets too. I'm not sure what this bike is running up front sprocket wise but for the race track does anyone have a recommendation.

Right now I "think" i'm running a 15/42. Seems ok. as it does need to wind out down the straight, but its a twisty ass track this year.

Just wondering if anyone had a recommendation.
Cheers.
James.

[Cammo]

IIRC you have an rvf right?

15/42 is already pretty low with an rvf gearbox but it really depends on the track. If it's 'really' tight and twisty you'll need at least a 14t front sprocket.

You can download a gearing calculator (excel file) here that's useful, you can get all the information you need to plug into it from the haynes manual: www.epicycle.com.au/images/gearing%20calculator.xls

[doodleface]

Cammo = Legend

[lukemillar]

I use:
http://www.gearingcommander.com/

I added the NC30, but not the 35. If you have a Haynes, then you can submit all the info and they'll add it to the DB.

[doodleface]

Thanks again, massive learning curve here but totally awesome. Love your work.
Cheers. I'm thinking 14 front and I already have a 42 and 45 tooth rear, might get a 38 tooth rear too which will cover me all tracks all conditions.