does anyone now what standard gearing for 2004 315r is

I believe it's 10/40 here's a link worth saving,http://montesacota315.com/en/

I had 99 and 02 315's the 99 had 10/40 sprockets and the 02 had 10/42, think rear size was changed with 01 model, same time as red tank appeared.

I had 99 and 02 315's the 99 had 10/40 sprockets and the 02 had 10/42, think rear size was changed with 01 model, same time as red tank appeared.

Yep, from what I recall the 01 upwards had a larger rear sprocket. My 98 defo had a 40 rear.

thanks for the help mine was on 10 42 moved it up to 10 44 find it suits me better