Missing/sputtering @ WOT

[hotrodbanshee]

When I run my shee, say 2nd or 3rd gear and hold it at wide open throttle, it starts missing and cutting out. Is this a lean condition? It runs really good up untill I hit WOT. Please help?????????

[2003LimitedBanshee]

If it acts as though it is loading up, then it sounds like your main is too big. Does it sputter and Pop, or will it not "clean" out? If it is a popping type sputter, then you likely need to go up on the main.

[hotrodbanshee]

It's a popping type sputter and as long as you hold it @WOT it keeps doing it. I am running 330 mains in it right now.

[2003LimitedBanshee]

Well based on your location and my guess of your elevation/air temp. I can't imagine you should be lean due to the main jet size. Are you running without a lid on the airbox? Even with that I would guess that you would be close, but probably a bit fat with 330's. Fatter still if you are running a lid or modded lid on the airbox. If it truly is a popping condition you're likely running lean. But with that jetting, it would lead me to believe that you may have an airleak somewhere. Have you tried the carb cleaner trick to search for air leaks? Something obviously isn't right, but it makes it a little more odd since it runs great up to WOT.

[hotrodbanshee]

I run without the air lid, proflow K/N outerware. I have sprayed carb cleaner arouind the carb boots and no change in rpm. It's really stressing me out. I guess I'll try different size mains and see what happens. If I was running rich it would bog as if I was running the choke half way out right?

[race-a-holic]

My friend's banshee was lean when he first got it.It would sound like a .22 going off.Really loud.Try at least a 350 main jet.If it's too rich,it will bog on top end like it doesn't want to rev like it should.Make sure to let it warm up before driving it really hard.

[2003LimitedBanshee]

Sorry, should have read your sig. and I could have seen that you weren't running a lid... Well, with all that said, I guess I would say if it wants more main, give it to it. Are your plugs light? With your head, it shouldn't affect the jetting, but likely octane requirement only. Like I said, if it wants it, give it some more. You're right to want to get rid of the popping, as it sounds lean, and they don't like that too long.

[wesw]

what needle clip is it on.

 

if 3rd raise it to the 4th and see how it acts

[hotrodbanshee]

I am on the 4th clip down from top dynojet needle's. Still have the stock needle's, should I try them? I was running it around 1/4-3/4 throttle for a while and the plugs were very dark tan/black, looked rich to me. I took it out on the road and held it at WOT for 5-10 sec and the plugs got lighter in color.

Edited March 5, 2006 by hotrodbanshee

[2003LimitedBanshee]

Not your fault but this should be a can of worms, with the stock vs. Dynojet needle. I run the Dynojet needles, with no problem and prefer them to stock. Some people will likely tell you to ditch the Dynojet's and switch back to stock. You should be pretty close at the 4th clip. It's standard for the plugs to be darker when running part throttle. How light were the plugs after you ran it WOT for 5-10 seconds? You should be shooting for a light chocolate milk color (tan-ish). Grey/brown is a little light, dark chocolate is too rich...

[hotrodbanshee]

They were starting to turn light brown tan. They were pretty dark from running part throttle. I will need to run her some more a WOT to make sure. If I put my air cleaner lid back and test her that should be enough to test and see if I need to go up on my mains? If it still misses out with the lid on something else is wrong huh? I will try and run her this week.

[g-force]

this may sound stupid, but have you tried a new set of plugs? everytime i've had popping its been the plugs! unless your way lean, but it dosen't sound like it to me.i run a 330 main and i'm ported.

Edited March 8, 2006 by g-force

[FIRST BANSHEE]

I agree a new set of plugs before you rejet. if you still have the same problem, try the lid like you sugested. 330's sound rich to me but every bike is different. what pilot are you running? maybe try your stock needls also. if you ride alot 1/4-3/4 throttle and your fat in the middle and foul your plugs your going to pop up top.

[hotrodbanshee]

I am running stock pilots

I agree a new set of plugs before you rejet. if you still have the same problem, try the lid like you sugested. 330's sound rich to me but every bike is different. what pilot are you running? maybe try your stock needls also.  if you ride alot 1/4-3/4 throttle and your fat in the middle and foul your plugs your going to pop up top. 

483834[/snapback]

[banshdog]

When was your last rebuild? Have you checked compression?