gearing my 426

[lcano]

I need some info on gearing my bike for a desert race that is coming in a couple of weeks. I have a yamaha 426 and I just bought a 15 tooth for the front and a 49 for the back. what is the top speed of that ratio?

[Woody_393]

Moved to the yamaha forum.

[Dirtbikindad393]

Originally posted by lcano
I need some info on gearing my bike for a desert race that is coming in a couple of weeks. I have a yamaha 426 and I just bought a 15 tooth for the front and a 49 for the back. what is the top speed of that ratio?

I can tell you this the stock sprockets are 14/49 with that I was clocked on my '02 yz426f at 80 mph. I too race desert here in So Calif in D-37. I also have gone to 15/49 and I feel like it was good for about 7mph but am not sure as I haven't been able to clock it yet with my injury. This weekend will be the first time back on my bike since Jan 25th and i am only using it as a pit bike to transport my rear from the staret line to the pits and out to the bomb to film some footage for the ATM video.

Welcome to ATM if I might suggest checking out the Knowledge Base archive for some good info and great reading.