I wouldn't suggest you change other than experimenting with the main jet. Factory racers look for what you have. It's up to you... The YZF uses a #162, the CRF a #175, and you're right in the middle. EMN is the same needle shifted a clip leaner. EKP is the other twin, splitting hairs on the needle diameter (.0004 inches)- leaner, 0-1/8 throttle range jetting. -What's with the "octopus removed"... you have a 2000WR?