[mighty max]

What is the best set up for track used...16/43 or 15/42...currently i'm running 16/42.... & my fren running 15/41(Rc51 rider also) We just tested at the track..Upon exit out the corner..both of us gas hard...seem dat he just passed me on the straight..

 

[JonnyUK]

I think generally -1 on the front is the same as +2 on the back. Also by going down on the front you wont have any problems with the chain being too short.

That is the limit of my knowledge though.

 

[jgos929]

I think 15/42 is spot on for track use.

 

[jhiiidoc]

Ratio

Actually, about every one tooth you go down in the front = 3 on the back. Your friend is pulling you because he has gone the equivalent of 5 teeth in the back and you have gone up 3.

Your ratio of 16/43 = 2.6875:1
Your bud"s is 15/42 = 2.8

Generally, the higher the ratio, the "quicker" the acceleration.

From what I understand, do not go below 15 on the front and no higher than 42-43 on the rear unless you like wheelies and violent engine breaking.

Gurus, chime in at anytime....

 

[Gipper]

For the track, you are supposed to gear for the front straight, aiming for max revs in the highest gear attainable (some straights aren't very long).

As for the RC, I just went to 15/43 and it works very well. Take-offs are very easy, but I still have to do some clutch slippage to maneuver around in parking lots. Acceleration is excellent. Engine braking is increased, but I use it to my advantage to set the bike for corners. RPMs on the highway at around 72-75 MPH is 4500, which is right in the sweet spot for the engine. And, the stock-length chain will accomodate the 15/43.

That being said, the most popular combination is 15/42. I went a little higher as my goal was to have the top end of 1st gear be 60 MPH.

Eric

 

[mighty max]

Tks bros,...at least i know where to start....i will set 15/42 1st..the track used by Motogp back in 1998 in Malaysia...& the other one is Sepang..dats the nearsest track to Singapore..