View Single Post
Old 11-04-2010, 11:37 PM   #43
tmex
Beastly Adventurer
 
tmex's Avatar
 
Joined: Apr 2006
Location: NorCal
Oddometer: 2,039
The main issue has nothing to do with the map. If it did, KTM would have fixed it long ago. There is no secondary air metering circuit for low speed operation which makes transitions from low RPM (idle) to mid throttle very lean and the bike stumbles. KTM controls idle air flow by keeping the primary butterflies cracked open. Simple calculus shows that the increase in airflow from a partially cracked condition to a more open position increases the area for air to flow very quickly. My speculation is that the injectors cannot respond rapidly enough to this condition and if they could the bike would react like a pogo stick.

BTW, I own four KTM's. So I am not bagging on the brand.
__________________
my favorite bike - R1200GS
tmex is offline   Reply With Quote