1/2-Full Throttle Sputter/Bog (Re-visited)
Posted December 31, 2005 - 08:16 AM
02' WR 426
YZ ex. cam w/ YZ timing (Im pretty darn sure now )
Air box lid off
BK mod (0.5 secs)
Stock exhaust w/ Pro Moto insert
-Stock jetting (165MJ, 42PJ, Stock needle clips 2-7)
-Stock jetting w/ 168MJ, 170MJ, 175MJ. (All MJ's were tested w/ stock needle using clip positions 3-7)
-Complete cleaning of carb (twice)
-Baffle is clean and clear
-Air filter is not over oiled
-Fuel supply from tank is in order and the tank cap vent is clear.
-Plug is fresh and gapped to spec
Today I tried out the new OCEMP needle from Sudco and my bog at 1/2 throttle is still there. With stock needle my slow circuit was spot on and I couldnt ask for better 0-1/4 throttle response but now with the EMP needle Im pretty sure Im running lean down low. I will bump up the pilot for that.
As far as my top end sputter/bog I guess I'll check my electronics next. Cant see them going bad already, bike only has 200 soft miles on it.
Any other ideas?
Posted December 31, 2005 - 10:52 AM
Posted December 31, 2005 - 12:23 PM
Could my TPS be causing this?
Is the open air box causing the bog?
Im at my wits end here
Posted December 31, 2005 - 02:24 PM
Posted December 31, 2005 - 02:41 PM
Im wondering if when I first got the bike and did a carb cleaning, if my TPS is out of spec when replacing the carb in bike. Dont know if an out of spec TPS would cause such an issue though.
Im going back to stock needle today since I think adding another variable such as a YZ needle is clouding my data points.
I dont have an multi-meter so I'll be picking one up today to check what I can.
Other than that Im at a loss.