banshee won't stay running help!

[badboyzracing187]

I need help with my banshee. Problem is it won't stay running on its own. Also at about 1/4 throttle it doesn't respond good. I recently did the top end and it's starts right away and runs excellent at 1/2 & full throttle. Any help would be appreciated.  Thanks

 

97 banshee

.20 wiseco pistons

Trinity mx ported cylinder jugs

Hot Rod crank (stock size)

+4 advanced timing

V force 4 reeds

310 main jets

Needle clip middle position

25 pilot jets

Carbs rebuilt

Fmf sst pipes

Unknown silencers just all chrome but are fmf

Cool head with 20cc domes

 

Elevation 3780 ft 

 

Any questions please let me know

Edited July 8, 2014 by badboyzracing187

[badboyzracing187]

I forgot to mention tors have been removed. Previous owner put the eliminator kit but no idle screws were installed. I'm assuming it doesn't need them since my friends banshee doesn't have the idle screws and it runs with no problems.

Edited July 8, 2014 by badboyzracing187

[oldskool]

If tors were removed from carbs, you will need Idle screws. maybe clean carbs paying special attention to pilot circuit.  are you running airbox with lid?

[sheerider11]

Won't stay running, dosent have idle screws. Are you seeing the connection?

Pilots to small. Get a 30 between the pipes porting and vf4 you need 30s. Your probably lean on the bottom causing the bog.

 

You may get away with a 27.5 with your elevation but a 30 is safe.

[badboyzracing187]

Thanks oldskool & sheerider11 for the response. I have a uni air filter with no lid. 

I also thought about putting 30 pilot jets. Should I mess around with needle as well or not. Maybe lower the clip one down to richen up a little

[WINDYCITYJOHN400]

One thing at a time.

Your pilot was stock on a built motor.

You need a 27.5 minimum

More likely 30's

 

Get slides sync'd and idle adjusted, then work on airscrew adjustments.

[badboyzracing187]

Thanks for the help. I'll do that and let u guys now the results.