Carb Question 99 WR400
Posted August 23, 2004 - 01:29 PM
Posted August 23, 2004 - 02:24 PM
I have a '99 WR400 with this problem also. If you have cleaned the routine crud buildup out of accelerator pump bowl, then try searcing for the "Taffy RC collar accelerator pump mod" in the TT archives. This mod involves mounting a tiny radio-controlled model wheel collar onto the acc. pump shaft. Set the shaft movement for 0.32 (+ -) and tighten the little allen key down. This will restrict the amount of "acc pump squirt" into the engine on initial throttling.
I would also HIGHLY SUGGEST replacing the timing chain on the bike. As the chain wears and stretches, your timing gets worse and worse. This timing error may be a significant part of the bog problem.
Hope this helps.
Posted August 23, 2004 - 06:57 PM
Posted October 04, 2004 - 12:21 AM