Originally Posted by Atomic Wedgie
Am I the only one not thrilled with the 500 EXC? So far I've had two ruptured fuel ines (ended up replacing the stock FI line with Gates FI line and a Golan filter). And I'll be damned if I can't keep the bike from flaming out and stalling, so far I've removed all of the smog equipment, put an FMF Q silencer on, and have added a JD Jetting 6X tuner...and this bike refuses to run right at low RPM's. I've had a couple of near get offs when approaching gnarly g-outs, crack the throttle and the bike bogs or just plain flames out. I've ridden Yamaha WR's for the past ten years and those didn't take near the work to get them to run right.
Do a search for "Throttle Position Sensor". It could be set wrong which will affect the flameout issue.
You can leave the JD Tuner in even with the new map. I use the unrestricted euro map. Put the stock silencer back on and see if that helps.That is what it is tuned for.