not2hi
06-09-2009, 08:05 AM
Just bought a stock 400ex carb to throw on our 300ex...148 main 38 pilot 2-1/2 turns on the bottom screw...
FYI, wiseco 11:1 .040 over, webcam, titanium valves and springs, FMF megamax system, no limit CDI, Uni fiter and holed airbox with lid
when we first put it on, it fired right up, ran a minute or two then died...wouldn't restart. Yesteday had the plug out for a while, popped it back in, fired right up and then died.
after further review, its fouling the plug, and gas is even the airbox, so its flooding...
guy I bought the carb from was using in his 300 an said it worked fine.
So i'm not even sure where to start - most jetting instructions start at idle, whereas i can't even get this one going for any length of time.
So I'm looking for advice on what to do first...
also, I'm going to buy some main and pilot jets for tuning, but not sure what sizes to buy (couple sizes smaller and couple sizes bigger for both?) and i guess a bunch of new plugs.
thanks
-mark-
FYI, wiseco 11:1 .040 over, webcam, titanium valves and springs, FMF megamax system, no limit CDI, Uni fiter and holed airbox with lid
when we first put it on, it fired right up, ran a minute or two then died...wouldn't restart. Yesteday had the plug out for a while, popped it back in, fired right up and then died.
after further review, its fouling the plug, and gas is even the airbox, so its flooding...
guy I bought the carb from was using in his 300 an said it worked fine.
So i'm not even sure where to start - most jetting instructions start at idle, whereas i can't even get this one going for any length of time.
So I'm looking for advice on what to do first...
also, I'm going to buy some main and pilot jets for tuning, but not sure what sizes to buy (couple sizes smaller and couple sizes bigger for both?) and i guess a bunch of new plugs.
thanks
-mark-