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carb problem ktm 450

5.8K views 6 replies 2 participants last post by  DW  
#1 · (Edited)
i have made multiple posts on this problem
2001 ktm 400 turned into 453cc porting high compression
jetting 45 pilot 170 main ocemn needle 4th clip r&d powerbowl dual spray venturi jet
carb was rebuilt multiple times accelerator pump works
carb is from 2004 exc-g 450 rest of carb
air jet settings are stock
1.5 turn out on fuel screw

still has stuttering and bogging above 1/4 throttle cannot get this bike to work have spent months trying to fix this and im about to just give up and get rid of this thing
 
Discussion starter · #4 ·
okay so i took the bike on a ride ocemn needle 4th clip 160 main jet and 45 pilot if im slow on the throttle it works very good but if i punch the throttle below half throttle it bogs down for a second then accelerates good if im going too slow then it will bog and die im thinking accelerator timing is off or main jet is still too big
 
Discussion starter · #6 ·
so i went ahead and put a 155 main in it 45 pilot and the ocemn on 4th clip and it still has this issue when its at low rpm the bike will bog down and then accelerate normally i feel as if there is one little thing i am missing everything in the carb works valves are adjusted good spark no vacuum leaks im 100 percent sure at this point its simply just getting the right jets in the carb and to get rid of the bog