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Track Gearing

12K views 9 replies 7 participants last post by  600RRacer 
#1 ·
I've just bought a 2005 600RR for track use. I want to lower the gearing and wonder what you would suggest? On my previous bike, a 675 Daytona, I dropped one tooth off the front sprocket and this seemed to be OK, so I'm thinking that would be a good start.

Most of the tracks I ride I don't get near to maxing out in top, except maybe for Aragon in Spain where I hit 152mph in top. That's a reliable figure from my GPS lap timer.
 
#2 ·
It's usually -1 front & +2 rear but in extremes it can even be +4 rear.
 
#3 · (Edited)
You don't get 152mph on the cbr600, at least not on stock gearing. See the attached top speed chart. I use this to figure out my gearing for each track. Generally, I want to gear it as low as possible (-x in the front, +x in the rear) but still tall enough that I hit top speed at the end of the longest straight. For most tracks around me, -1 front, +1 or +2 rear is a good general starting point. But COTA has a huge long back straight, so I'm still trying to figure it out - the closest I've come is full stock, but I want to try stock in the front, -1 in the back.
 
#7 ·
You misread the chart. The pre loaded chart stops at 13500 rpms. You have to adjust it. Rev limit is around 15000-15500 IIRC. Stock gearing is also 16/43 not 16/42.

Text Font Line Number Parallel



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2014 Triumph Daytona 675R 2/22/14 - 8/22/15

2016 Aprilia RSV4 RR 8/29/15 - ???

2006 Honda CBR 600RR Track Only 1/02/16 - ???
 
#6 ·
15/45 if you stick with a 180/55 rear is the most common. Can also do 14/43 if you want to run a 190/60 (like a Pirelli rain tire size).

I have the following. 14 and 15 front. Rear 42, 43, 44, 45, 46.

I'm running 15/45 right now with a 180/55. But once I switch to. 180/60 I'll more than likely have to play around with gearing


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2014 Triumph Daytona 675R 2/22/14 - 8/22/15

2016 Aprilia RSV4 RR 8/29/15 - ???

2006 Honda CBR 600RR Track Only 1/02/16 - ???
 
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