Originally Posted by peter650
In Australia most dirt bikes are geared for 140 to 150klm flat out. On open tar roads most people sit on 120 klms which puts you on the main jet.
I live in australia
just out of curiosity ... if you are on the main at 120 ... what do you do to get to 140 - 150 ?
... surely it couldn't be open the throttle to raise the needle out of the needle jet to fully expose it