bike runs better when the choke is on

[peterlocal22]

bike runs great when the choke is all the way out.

when i pushed the choke in the idle went down and when i tried to give it alittle throttle it bogged down and died. when i turned the air screws to the right so the screw was going in the throttle got better when the choke was in. adventually the screws were maxxed out to the right however the first bit of throttle was much better. i think this means my pilot jet needs to be adjusted right? if so do i go up or down? if this is not the case can some one direct me to the correction?

thanks

[Chris64]

bike runs great when the choke is all the way out.

when i pushed the choke in the idle went down and when i tried to give it alittle throttle it bogged down and died. when i turned the air screws to the right so the screw was going in the throttle got better when the choke was in. adventually the screws were maxxed out to the right however the first bit of throttle was much better. i think this means my pilot jet needs to be adjusted right? if so do i go up or down? if this is not the case can some one direct me to the correction?

thanks

 

If it works better with the choke on, then you're pretty lean. Also the choke is only for one cylinder so don't run it long like that...very dangerous state to be in (lean burns hot and will destroy your motor quickly).

 

Air screw will make allow some adjustment but it sounds like your problem may need more. The needle position is easy and will help mid range (move needle down). If you don't have power at full open then your mains need to be bigger. The air screw affects everything (I don't remember whether in is less air or less fule...I think less air). Usually the measure those by turning it all the way in and backing it out around 2 1/2 turns. (refer to the manual - or the web)

 

It's better to get your main dialed in first but as a precaution I'd move the needle clip too. it's easy to do. Remove the carb cap, coil the spring up (out of the slide) and hold it upside down and the needle retainer will drop out. Then you can disconnect the cable and adjust it.

 

Also, check your plugs. They'll tell you for sure if the mixture is good. Have fun. Jetting Banshee's is a drag.

[fastbanshee8]

bike runs great when the choke is all the way out.

when i pushed the choke in the idle went down and when i tried to give it alittle throttle it bogged down and died. when i turned the air screws to the right so the screw was going in the throttle got better when the choke was in. adventually the screws were maxxed out to the right however the first bit of throttle was much better. i think this means my pilot jet needs to be adjusted right? if so do i go up or down? if this is not the case can some one direct me to the correction?

thanks

 

You need to go to a bigger size pilot jet. What size, I don't know, because I have very little experience with Keihin carbs. One or two sizes bigger on the pilot will usually fix the problem, and then adjust the air mixture screws.

[peterlocal22]

You need to go to a bigger size pilot jet. What size, I don't know, because I have very little experience with Keihin carbs. One or two sizes bigger on the pilot will usually fix the problem, and then adjust the air mixture screws.

 

actually it for my brothers bike. he has stock dual carbs. thats why im alittle unsure i have very little exp. w the the dual stockers.

[sheerider1026]

clean the carbs!!!!! has it sat for a long time?? it takes almost nothing to stop up a pilot jet.. take out the jets and clean and blow them out.. clean the carbs completely.. your air screw should be 1 1/2 turns out from closed .. make sure u get the choke tube hooked back up also(tube between the carbs) hope this helps