Just installed a JD Jetting Kit in my '08 Dr-Z400 S. It starts, idles and runs great here around sea level when applying throttle up to about 50% - then hits a flat spot. If I open the throttle slowly all the way it will eventually rev up to something like I would expect.
Details:
FMF Full Exhaust, 3x3, charcoal cannister removed but all vent, vacuum and fuel lines rerun to spec and confirmed tight.
I live and run mostly at 0-1,000 ft but will be spending more time up to 4,000+ soon. I don't want to rejet frequently.
JD Jet Kit Installed as follows:
- 160 Main
- Red Needle @3 (anticipating the altitude - might be my problem with the big main ?)
- 25 Pilot
- TT Adjustable Fuel Screw @ 2x.
ps: I did have the TPS off at one point for the rebuild and it's back on now and connected.
Thanks !